tech:network:cisco:ospf:ospf:ospf-basic:ospf-basic
Table of Contents
OSPF Fundamental Configuration
GNS3 Virtual Lab.
Basic IP Configuration
- R1
en conf t ! hostname R1 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 1.1.1.1 255.255.255.255 no shut exit int gig0/0 ip address 192.168.0.1 255.255.255.0 no shut exit int gig0/1 ip address 192.168.1.1 255.255.255.0 no shut exit ! end wr
- R2
en conf t ! hostname R2 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 2.2.2.2 255.255.255.255 no shut exit int gig0/0 ip address 192.168.1.2 255.255.255.0 no shut exit int gig0/1 ip address 192.168.2.2 255.255.255.0 no shut exit ! end wr
- R3
en conf t ! hostname R3 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 3.3.3.3 255.255.255.255 no shut exit int gig0/0 ip address 192.168.2.3 255.255.255.0 no shut exit int gig0/1 ip address 192.168.3.3 255.255.255.0 no shut exit ! end wr
- PC1
ip 192.168.0.101 255.255.255.0 192.168.0.1 save
- PC2
ip 192.168.3.102 255.255.255.0 192.168.3.3 save
R1#sh ip int b Interface IP-Address OK? Method Status Protocol GigabitEthernet0/0 192.168.0.1 YES manual up up GigabitEthernet0/1 192.168.1.1 YES manual up up GigabitEthernet0/2 unassigned YES NVRAM administratively down down GigabitEthernet0/3 unassigned YES NVRAM administratively down down Loopback0 1.1.1.1 YES manual up up R1#ping 192.168.1.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 3/3/4 ms R1#192.168.1.2 Trying 192.168.1.2 ... % Connection refused by remote host R1#ping 192.168.1.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 3/3/4 ms
R2#sh ip int b Interface IP-Address OK? Method Status Protocol GigabitEthernet0/0 192.168.1.2 YES manual up up GigabitEthernet0/1 192.168.2.2 YES manual up up GigabitEthernet0/2 unassigned YES NVRAM administratively down down GigabitEthernet0/3 unassigned YES NVRAM administratively down down Loopback0 2.2.2.2 YES manual up up
R3#sh ip int b Interface IP-Address OK? Method Status Protocol GigabitEthernet0/0 192.168.2.3 YES manual up up GigabitEthernet0/1 192.168.3.3 YES manual up up GigabitEthernet0/2 unassigned YES NVRAM administratively down down GigabitEthernet0/3 unassigned YES NVRAM administratively down down Loopback0 3.3.3.3 YES manual up up R3#ping 192.168.2.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.2.2, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 4/4/5 ms R3#ping 192.168.2.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.2.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 3/4/5 ms
Single Area OSPF
- R1
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.0.1 0.0.0.0 area 0 network 192.168.1.1 0.0.0.0 area 0 exit ! end
- R2
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.1.2 0.0.0.0 area 0 network 192.168.2.2 0.0.0.0 area 0 exit ! end
- R3
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.2.3 0.0.0.0 area 0 network 192.168.3.3 0.0.0.0 area 0 ! end
PC-1> ping 192.168.3.102 -t *192.168.0.1 icmp_seq=1 ttl=255 time=2.358 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=2 ttl=255 time=2.523 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=3 ttl=255 time=2.912 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=4 ttl=255 time=2.403 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=5 ttl=255 time=2.447 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=6 ttl=255 time=2.501 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=7 ttl=255 time=2.216 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=8 ttl=255 time=2.493 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=9 ttl=255 time=2.516 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=10 ttl=255 time=2.423 ms (ICMP type:3, code:1, Destination host unreachable) (snip) *192.168.0.1 icmp_seq=181 ttl=255 time=4.858 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=182 ttl=255 time=2.566 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=183 ttl=255 time=3.617 ms (ICMP type:3, code:1, Destination host unreachable) *192.168.0.1 icmp_seq=184 ttl=255 time=2.432 ms (ICMP type:3, code:1, Destination host unreachable) 192.168.3.102 icmp_seq=185 timeout 192.168.3.102 icmp_seq=186 timeout 84 bytes from 192.168.3.102 icmp_seq=187 ttl=61 time=4.044 ms 84 bytes from 192.168.3.102 icmp_seq=188 ttl=61 time=3.752 ms 84 bytes from 192.168.3.102 icmp_seq=189 ttl=61 time=4.087 ms 84 bytes from 192.168.3.102 icmp_seq=190 ttl=61 time=3.921 ms 84 bytes from 192.168.3.102 icmp_seq=191 ttl=61 time=5.257 ms 84 bytes from 192.168.3.102 icmp_seq=192 ttl=61 time=3.963 ms 84 bytes from 192.168.3.102 icmp_seq=193 ttl=61 time=4.287 ms 84 bytes from 192.168.3.102 icmp_seq=194 ttl=61 time=3.521 ms 84 bytes from 192.168.3.102 icmp_seq=195 ttl=61 time=4.125 ms 84 bytes from 192.168.3.102 icmp_seq=196 ttl=61 time=7.499 ms 84 bytes from 192.168.3.102 icmp_seq=197 ttl=61 time=4.742 ms 84 bytes from 192.168.3.102 icmp_seq=198 ttl=61 time=4.168 ms 84 bytes from 192.168.3.102 icmp_seq=199 ttl=61 time=4.230 ms 84 bytes from 192.168.3.102 icmp_seq=200 ttl=61 time=5.549 ms 84 bytes from 192.168.3.102 icmp_seq=201 ttl=61 time=3.950 ms 84 bytes from 192.168.3.102 icmp_seq=202 ttl=61 time=5.529 ms 84 bytes from 192.168.3.102 icmp_seq=203 ttl=61 time=4.080 ms 84 bytes from 192.168.3.102 icmp_seq=204 ttl=61 time=7.923 ms 192.168.3.102 icmp_seq=205 timeout 192.168.3.102 icmp_seq=206 timeout 192.168.3.102 icmp_seq=207 timeout 192.168.3.102 icmp_seq=208 timeout 84 bytes from 192.168.3.102 icmp_seq=209 ttl=61 time=4.162 ms 84 bytes from 192.168.3.102 icmp_seq=210 ttl=61 time=5.211 ms 84 bytes from 192.168.3.102 icmp_seq=211 ttl=61 time=4.354 ms 84 bytes from 192.168.3.102 icmp_seq=212 ttl=61 time=5.367 ms 84 bytes from 192.168.3.102 icmp_seq=213 ttl=61 time=4.065 ms 84 bytes from 192.168.3.102 icmp_seq=214 ttl=61 time=4.243 ms 84 bytes from 192.168.3.102 icmp_seq=215 ttl=61 time=4.045 ms ^C
PC-2> ping 192.168.0.101 192.168.0.101 icmp_seq=1 timeout 192.168.0.101 icmp_seq=2 timeout 84 bytes from 192.168.0.101 icmp_seq=3 ttl=61 time=9.200 ms 84 bytes from 192.168.0.101 icmp_seq=4 ttl=61 time=4.381 ms 84 bytes from 192.168.0.101 icmp_seq=5 ttl=61 time=6.712 ms
R1#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.0.0/24 is directly connected, GigabitEthernet0/0
L 192.168.0.1/32 is directly connected, GigabitEthernet0/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, GigabitEthernet0/1
L 192.168.1.1/32 is directly connected, GigabitEthernet0/1
O 192.168.2.0/24 [110/2] via 192.168.1.2, 00:01:07, GigabitEthernet0/1
O 192.168.3.0/24 [110/3] via 192.168.1.2, 00:00:57, GigabitEthernet0/1
R1#sh ip ospf database
OSPF Router with ID (1.1.1.1) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 1744 0x80000003 0x00973F 2
2.2.2.2 2.2.2.2 1687 0x80000004 0x000C4F 2
3.3.3.3 3.3.3.3 1687 0x80000003 0x00B30B 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.1.2 2.2.2.2 1745 0x80000001 0x0009B0
192.168.2.3 3.3.3.3 1688 0x80000001 0x002A81
R1#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 1.1.1.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.0.1 0.0.0.0 area 0
192.168.1.1 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
3.3.3.3 110 00:29:53
2.2.2.2 110 00:31:02
Distance: (default is 110)
R2#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback0
O 192.168.0.0/24 [110/2] via 192.168.1.1, 00:02:10, GigabitEthernet0/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, GigabitEthernet0/0
L 192.168.1.2/32 is directly connected, GigabitEthernet0/0
192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.2.0/24 is directly connected, GigabitEthernet0/1
L 192.168.2.2/32 is directly connected, GigabitEthernet0/1
O 192.168.3.0/24 [110/2] via 192.168.2.3, 00:01:11, GigabitEthernet0/1
R2#sh ip ospf database
OSPF Router with ID (2.2.2.2) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 1790 0x80000003 0x00973F 2
2.2.2.2 2.2.2.2 1730 0x80000004 0x000C4F 2
3.3.3.3 3.3.3.3 1731 0x80000003 0x00B30B 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.1.2 2.2.2.2 1789 0x80000001 0x0009B0
192.168.2.3 3.3.3.3 1731 0x80000001 0x002A81
R2#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 2.2.2.2
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.1.2 0.0.0.0 area 0
192.168.2.2 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
3.3.3.3 110 00:30:14
1.1.1.1 110 00:31:13
Distance: (default is 110)
R2#
R3#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
O 192.168.0.0/24 [110/3] via 192.168.2.2, 00:01:16, GigabitEthernet0/0
O 192.168.1.0/24 [110/2] via 192.168.2.2, 00:01:16, GigabitEthernet0/0
192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.2.0/24 is directly connected, GigabitEthernet0/0
L 192.168.2.3/32 is directly connected, GigabitEthernet0/0
192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.3.0/24 is directly connected, GigabitEthernet0/1
L 192.168.3.3/32 is directly connected, GigabitEthernet0/1
R3#sh ip ospf database
OSPF Router with ID (3.3.3.3) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 1796 0x80000003 0x00973F 2
2.2.2.2 2.2.2.2 1737 0x80000004 0x000C4F 2
3.3.3.3 3.3.3.3 1736 0x80000003 0x00B30B 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.1.2 2.2.2.2 1795 0x80000001 0x0009B0
192.168.2.3 3.3.3.3 1736 0x80000001 0x002A81
R3#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 3.3.3.3
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.2.3 0.0.0.0 area 0
192.168.3.3 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
2.2.2.2 110 00:30:28
1.1.1.1 110 00:30:28
Distance: (default is 110)
Multi-Area OSPF
- R1
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.0.1 0.0.0.0 area 1 network 192.168.1.1 0.0.0.0 area 1 exit ! end
- R2
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.1.2 0.0.0.0 area 1 network 192.168.2.2 0.0.0.0 area 0 exit ! end
- R3
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.2.3 0.0.0.0 area 0 network 192.168.3.3 0.0.0.0 area 0 ! end
R1#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.0.0/24 is directly connected, GigabitEthernet0/0
L 192.168.0.1/32 is directly connected, GigabitEthernet0/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, GigabitEthernet0/1
L 192.168.1.1/32 is directly connected, GigabitEthernet0/1
O 192.168.2.0/24 [110/2] via 192.168.1.2, 00:01:07, GigabitEthernet0/1
O 192.168.3.0/24 [110/3] via 192.168.1.2, 00:00:57, GigabitEthernet0/1
R1#sh ip proto
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 1.1.1.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.0.1 0.0.0.0 area 1
192.168.1.1 0.0.0.0 area 1
Routing Information Sources:
Gateway Distance Last Update
2.2.2.2 110 00:06:21
Distance: (default is 110)
R1#sh ip ospf database
OSPF Router with ID (1.1.1.1) (Process ID 1)
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 894 0x80000003 0x008D4A 2
2.2.2.2 2.2.2.2 873 0x80000003 0x0049FE 1
Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
192.168.1.1 1.1.1.1 894 0x80000001 0x00417D
Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
192.168.2.0 2.2.2.2 868 0x80000001 0x008F39
192.168.3.0 2.2.2.2 805 0x80000001 0x008E38
R1#sh ip ospf int
GigabitEthernet0/1 is up, line protocol is up
Internet Address 192.168.1.1/24, Area 1, Attached via Network Statement
Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 1.1.1.1, Interface address 192.168.1.1
Backup Designated router (ID) 2.2.2.2, Interface address 192.168.1.2
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:06
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/2/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 2, maximum is 2
Last flood scan time is 0 msec, maximum is 1 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 2.2.2.2 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
GigabitEthernet0/0 is up, line protocol is up
Internet Address 192.168.0.1/24, Area 1, Attached via Network Statement
Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 1.1.1.1, Interface address 192.168.0.1
No backup designated router on this network
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:03
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/1/1, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 0, maximum is 0
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 0, Adjacent neighbor count is 0
Suppress hello for 0 neighbor(s)
R2 is ABR.
R2#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback0
O 192.168.0.0/24 [110/2] via 192.168.1.1, 00:01:22, GigabitEthernet0/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, GigabitEthernet0/0
L 192.168.1.2/32 is directly connected, GigabitEthernet0/0
192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.2.0/24 is directly connected, GigabitEthernet0/1
L 192.168.2.2/32 is directly connected, GigabitEthernet0/1
O 192.168.3.0/24 [110/2] via 192.168.2.3, 00:00:14, GigabitEthernet0/1
R2#sh ip proto
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 2.2.2.2
It is an area border router
Number of areas in this router is 2. 2 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.1.2 0.0.0.0 area 1
192.168.2.2 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
3.3.3.3 110 00:06:26
1.1.1.1 110 00:07:34
Distance: (default is 110)
R2#sh ip ospf database
OSPF Router with ID (2.2.2.2) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
2.2.2.2 2.2.2.2 841 0x80000002 0x0075CF 1
3.3.3.3 3.3.3.3 842 0x80000003 0x00B30B 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.2.3 3.3.3.3 842 0x80000001 0x002A81
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.0.0 2.2.2.2 904 0x80000001 0x00AF1A
192.168.1.0 2.2.2.2 904 0x80000001 0x009A2F
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 927 0x80000003 0x008D4A 2
2.2.2.2 2.2.2.2 904 0x80000003 0x0049FE 1
Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
192.168.1.1 1.1.1.1 927 0x80000001 0x00417D
Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
192.168.2.0 2.2.2.2 899 0x80000001 0x008F39
192.168.3.0 2.2.2.2 836 0x80000001 0x008E38
R2#sh ip ospf interface
GigabitEthernet0/1 is up, line protocol is up
Internet Address 192.168.2.2/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 2.2.2.2, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 3.3.3.3, Interface address 192.168.2.3
Backup Designated router (ID) 2.2.2.2, Interface address 192.168.2.2
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:00
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/1/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 3, maximum is 3
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 3.3.3.3 (Designated Router)
Suppress hello for 0 neighbor(s)
GigabitEthernet0/0 is up, line protocol is up
Internet Address 192.168.1.2/24, Area 1, Attached via Network Statement
Process ID 1, Router ID 2.2.2.2, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 1.1.1.1, Interface address 192.168.1.1
Backup Designated router (ID) 2.2.2.2, Interface address 192.168.1.2
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:07
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/1/1, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 3, maximum is 3
Last flood scan time is 0 msec, maximum is 1 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 1.1.1.1 (Designated Router)
Suppress hello for 0 neighbor(s)
R3#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
O IA 192.168.0.0/24 [110/3] via 192.168.2.2, 00:00:27, GigabitEthernet0/0
O IA 192.168.1.0/24 [110/2] via 192.168.2.2, 00:00:27, GigabitEthernet0/0
192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.2.0/24 is directly connected, GigabitEthernet0/0
L 192.168.2.3/32 is directly connected, GigabitEthernet0/0
192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.3.0/24 is directly connected, GigabitEthernet0/1
L 192.168.3.3/32 is directly connected, GigabitEthernet0/1
R3#sh ip proto
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 3.3.3.3
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.2.3 0.0.0.0 area 0
192.168.3.3 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
2.2.2.2 110 00:07:37
Distance: (default is 110)
R3#sh ip ospf database
OSPF Router with ID (3.3.3.3) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
2.2.2.2 2.2.2.2 857 0x80000002 0x0075CF 1
3.3.3.3 3.3.3.3 856 0x80000003 0x00B30B 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.2.3 3.3.3.3 856 0x80000001 0x002A81
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.0.0 2.2.2.2 921 0x80000001 0x00AF1A
192.168.1.0 2.2.2.2 921 0x80000001 0x009A2F
PC-1> ping 192.168.3.102 84 bytes from 192.168.3.102 icmp_seq=1 ttl=61 time=4.962 ms 84 bytes from 192.168.3.102 icmp_seq=2 ttl=61 time=4.245 ms 84 bytes from 192.168.3.102 icmp_seq=3 ttl=61 time=5.150 ms 84 bytes from 192.168.3.102 icmp_seq=4 ttl=61 time=4.067 ms 84 bytes from 192.168.3.102 icmp_seq=5 ttl=61 time=4.166 ms
PC-2> ping 192.168.0.101
84 bytes from 192.168.0.101 icmp_seq=1 ttl=61 time=4.128 ms
84 bytes from 192.168.0.101 icmp_seq=2 ttl=61 time=4.026 ms
84 bytes from 192.168.0.101 icmp_seq=3 ttl=61 time=3.976 ms
84 bytes from 192.168.0.101 icmp_seq=4 ttl=61 time=4.827 ms
84 bytes from 192.168.0.101 icmp_seq=5 ttl=61 time=4.019 ms
R3#sh ip ospf interface
GigabitEthernet0/1 is up, line protocol is up
Internet Address 192.168.3.3/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 3.3.3.3, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 3.3.3.3, Interface address 192.168.3.3
No backup designated router on this network
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:01
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/2/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 0, maximum is 0
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 0, Adjacent neighbor count is 0
Suppress hello for 0 neighbor(s)
GigabitEthernet0/0 is up, line protocol is up
Internet Address 192.168.2.3/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 3.3.3.3, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 3.3.3.3, Interface address 192.168.2.3
Backup Designated router (ID) 2.2.2.2, Interface address 192.168.2.2
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:07
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/1/1, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 2, maximum is 2
Last flood scan time is 1 msec, maximum is 1 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 2.2.2.2 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
R1#debug ip ospf adj OSPF adjacency debugging is on R1#clea R1#clear ip R1#clear ip os R1#clear ip ospf pro R1#clear ip ospf process ? <cr> R1#clear ip ospf process Reset ALL OSPF processes? [no]: yes
Same cost load balancing
- R1
en conf t ! hostname R1 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 1.1.1.1 255.255.255.255 no shut exit int gig0/0 ip address 172.16.1.1 255.255.255.0 no shut exit int gig0/1 ip address 172.16.2.1 255.255.255.0 no shut int gig0/2 ip address 172.16.3.1 255.255.255.0 no shut int gig0/3 ip address 172.16.4.1 255.255.255.0 no shut exit ! end wr
- R2
en conf t ! hostname R2 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 2.2.2.2 255.255.255.255 no shut exit int gig0/0 ip address 172.16.2.2 255.255.255.0 no shut exit int gig0/1 ip address 172.16.5.2 255.255.255.0 no shut exit ! end wr
- R3
en conf t ! hostname R3 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 3.3.3.3 255.255.255.255 no shut exit int gig0/0 ip address 172.16.3.3 255.255.255.0 no shut exit int gig0/1 ip address 172.16.5.3 255.255.255.0 no shut exit ! end wr
- R4
en conf t ! hostname R4 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 4.4.4.4 255.255.255.255 no shut exit int gig0/0 ip address 172.16.4.4 255.255.255.0 no shut exit int gig0/1 ip address 172.16.5.4 255.255.255.0 no shut exit ! end wr
- PC1
ip 172.16.1.101 255.255.255.0 172.16.1.1 save
- PC2
ip 172.16.5.102 255.255.255.0 172.16.5.2 save
- R1
en conf t ! ! OSPF Configuration router ospf 1 network 172.16.1.1 0.0.0.0 area 0 network 172.16.2.1 0.0.0.0 area 0 network 172.16.3.1 0.0.0.0 area 0 network 172.16.4.1 0.0.0.0 area 0 exit ! end
- R2
en conf t ! ! OSPF Configuration router ospf 1 network 172.16.2.2 0.0.0.0 area 0 network 172.16.5.2 0.0.0.0 area 0 exit ! end
- R3
en conf t ! ! OSPF Configuration router ospf 1 network 172.16.3.3 0.0.0.0 area 0 network 172.16.5.3 0.0.0.0 area 0 ! end
- R4
en conf t ! ! OSPF Configuration router ospf 1 network 172.16.4.4 0.0.0.0 area 0 network 172.16.5.4 0.0.0.0 area 0 ! end
R1#sh ip ro ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 9 subnets, 2 masks
O 172.16.5.0/24 [110/2] via 172.16.4.4, 00:08:39, GigabitEthernet0/3
[110/2] via 172.16.3.3, 00:08:39, GigabitEthernet0/2
[110/2] via 172.16.2.2, 00:08:39, GigabitEthernet0/1
R2#sh ip ro ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 7 subnets, 2 masks
O 172.16.1.0/24 [110/2] via 172.16.2.1, 00:12:20, GigabitEthernet0/0
O 172.16.3.0/24 [110/2] via 172.16.5.3, 00:12:10, GigabitEthernet0/1
[110/2] via 172.16.2.1, 00:12:10, GigabitEthernet0/0
O 172.16.4.0/24 [110/2] via 172.16.5.4, 00:12:10, GigabitEthernet0/1
[110/2] via 172.16.2.1, 00:12:10, GigabitEthernet0/0
R3#sh ip ro ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 7 subnets, 2 masks
O 172.16.1.0/24 [110/2] via 172.16.3.1, 00:12:28, GigabitEthernet0/0
O 172.16.2.0/24 [110/2] via 172.16.5.2, 00:12:18, GigabitEthernet0/1
[110/2] via 172.16.3.1, 00:12:28, GigabitEthernet0/0
O 172.16.4.0/24 [110/2] via 172.16.5.4, 00:12:18, GigabitEthernet0/1
[110/2] via 172.16.3.1, 00:12:18, GigabitEthernet0/0
R4#sh ip ro ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 7 subnets, 2 masks
O 172.16.1.0/24 [110/2] via 172.16.4.1, 00:13:43, GigabitEthernet0/0
O 172.16.2.0/24 [110/2] via 172.16.5.2, 00:13:43, GigabitEthernet0/1
[110/2] via 172.16.4.1, 00:13:43, GigabitEthernet0/0
O 172.16.3.0/24 [110/2] via 172.16.5.3, 00:13:43, GigabitEthernet0/1
[110/2] via 172.16.4.1, 00:13:43, GigabitEthernet0/0
conf t ! router ospf 1 maximum-paths 2 ! end
R1#sh run | section router ospf 1 router ospf 1 network 172.16.1.1 0.0.0.0 area 0 network 172.16.2.1 0.0.0.0 area 0 network 172.16.3.1 0.0.0.0 area 0 network 172.16.4.1 0.0.0.0 area 0 maximum-paths 2
R1#sh ip ro ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 9 subnets, 2 masks
O 172.16.5.0/24 [110/2] via 172.16.4.4, 00:01:30, GigabitEthernet0/3
[110/2] via 172.16.3.3, 00:01:30, GigabitEthernet0/2
PC-1> ping 172.16.5.102 84 bytes from 172.16.5.102 icmp_seq=1 ttl=62 time=2.812 ms 84 bytes from 172.16.5.102 icmp_seq=2 ttl=62 time=2.823 ms 84 bytes from 172.16.5.102 icmp_seq=3 ttl=62 time=2.974 ms 84 bytes from 172.16.5.102 icmp_seq=4 ttl=62 time=3.375 ms 84 bytes from 172.16.5.102 icmp_seq=5 ttl=62 time=2.981 ms
passive-interface
- R1
en conf t ! hostname R1 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 1.1.1.1 255.255.255.255 no shut exit int gig0/0 ip address 192.168.0.1 255.255.255.0 no shut exit int gig0/1 ip address 192.168.1.1 255.255.255.0 no shut exit ! end wr
- R2
en conf t ! hostname R2 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 2.2.2.2 255.255.255.255 no shut exit int gig0/0 ip address 192.168.1.2 255.255.255.0 no shut exit int gig0/1 ip address 192.168.2.2 255.255.255.0 no shut exit ! end wr
- R3
en conf t ! hostname R3 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! int lo0 ip address 3.3.3.3 255.255.255.255 no shut exit int gig0/0 ip address 192.168.2.3 255.255.255.0 no shut exit int gig0/1 ip address 192.168.3.3 255.255.255.0 no shut exit ! end wr
- PC1
ip 192.168.0.101 255.255.255.0 192.168.0.1 save
- PC2
ip 192.168.3.102 255.255.255.0 192.168.3.3 save
- R1
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.0.1 0.0.0.0 area 0 network 192.168.1.1 0.0.0.0 area 0 exit ! end
- R2
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.1.2 0.0.0.0 area 0 network 192.168.2.2 0.0.0.0 area 0 exit ! end
- R3
en conf t ! ! OSPF Configuration router ospf 1 network 192.168.2.3 0.0.0.0 area 0 network 192.168.3.3 0.0.0.0 area 0 ! end
R1#debug ip ospf packet OSPF packet debugging is on R1# *Oct 2 22:48:51.971: OSPF-1 PAK : Gi0/1: IN: 192.168.1.2->224.0.0.5: ver:2 type:1 len:48 rid:2.2.2.2 area:0.0.0.0 chksum:6340 auth:0 R1# *Oct 2 22:48:53.949: OSPF-1 PAK : Gi0/0: OUT: 192.168.0.1->224.0.0.5: ver:2 type:1 len:44 rid:1.1.1.1 area:0.0.0.0 chksum:29F3 auth:0 *Oct 2 22:48:54.874: OSPF-1 PAK : Gi0/1: OUT: 192.168.1.1->224.0.0.5: ver:2 type:1 len:48 rid:1.1.1.1 area:0.0.0.0 chksum:6340 auth:0 R1# *Oct 2 22:49:01.046: OSPF-1 PAK : Gi0/1: IN: 192.168.1.2->224.0.0.5: ver:2 type:1 len:48 rid:2.2.2.2 area:0.0.0.0 chksum:6340 auth:0 R1# *Oct 2 22:49:03.852: OSPF-1 PAK : Gi0/0: OUT: 192.168.0.1->224.0.0.5: ver:2 type:1 len:44 rid:1.1.1.1 area:0.0.0.0 chksum:29F3 auth:0 *Oct 2 22:49:03.961: OSPF-1 PAK : Gi0/1: OUT: 192.168.1.1->224.0.0.5: ver:2 type:1 len:48 rid:1.1.1.1 area:0.0.0.0 chksum:6340 auth:0
R3#debug ip ospf packet OSPF packet debugging is on R3# *Oct 2 22:48:49.181: OSPF-1 PAK : Gi0/0: IN: 192.168.2.2->224.0.0.5: ver:2 type:1 len:48 rid:2.2.2.2 area:0.0.0.0 chksum:5D3A auth:0 R3# *Oct 2 22:48:52.958: OSPF-1 PAK : Gi0/0: OUT: 192.168.2.3->224.0.0.5: ver:2 type:1 len:48 rid:3.3.3.3 area:0.0.0.0 chksum:5D3A auth:0 *Oct 2 22:48:53.489: OSPF-1 PAK : Gi0/1: OUT: 192.168.3.3->224.0.0.5: ver:2 type:1 len:44 rid:3.3.3.3 area:0.0.0.0 chksum:22ED auth:0 R3# *Oct 2 22:48:58.525: OSPF-1 PAK : Gi0/0: IN: 192.168.2.2->224.0.0.5: ver:2 type:1 len:48 rid:2.2.2.2 area:0.0.0.0 chksum:5D3A auth:0 R3# *Oct 2 22:49:02.309: OSPF-1 PAK : Gi0/0: OUT: 192.168.2.3->224.0.0.5: ver:2 type:1 len:48 rid:3.3.3.3 area:0.0.0.0 chksum:5D3A auth:0 *Oct 2 22:49:02.809: OSPF-1 PAK : Gi0/1: OUT: 192.168.3.3->224.0.0.5: ver:2 type:1 len:44 rid:3.3.3.3 area:0.0.0.0 chksum:22ED auth:0 R3# *Oct 2 22:49:07.637: OSPF-1 PAK : Gi0/0: IN: 192.168.2.2->224.0.0.5: ver:2 type:1 len:48 rid:2.2.2.2 area:0.0.0.0 chksum:5D3A auth:0 R3# *Oct 2 22:49:11.746: OSPF-1 PAK : Gi0/0: OUT: 192.168.2.3->224.0.0.5: ver:2 type:1 len:48 rid:3.3.3.3 area:0.0.0.0 chksum:5D3A auth:0 *Oct 2 22:49:12.264: OSPF-1 PAK : Gi0/1: OUT: 192.168.3.3->224.0.0.5: ver:2 type:1 len:44 rid:3.3.3.3 area:0.0.0.0 chksum:22ED auth:0 R3#
R1#debug ip ospf hello OSPF hello debugging is on R1# R1# *Oct 6 02:47:40.551: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.0.1 *Oct 6 02:47:41.013: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1# *Oct 6 02:47:46.608: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1# *Oct 6 02:47:50.214: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 *Oct 6 02:47:50.265: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.0.1 R1# *Oct 6 02:47:55.625: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1# *Oct 6 02:47:59.557: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.0.1 *Oct 6 02:47:59.740: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1# *Oct 6 02:48:05.175: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1# *Oct 6 02:48:08.865: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.0.1 *Oct 6 02:48:08.893: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1# *Oct 6 02:48:14.841: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1# *Oct 6 02:48:17.981: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 *Oct 6 02:48:18.185: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.0.1 R1# *Oct 6 02:48:24.836: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1# *Oct 6 02:48:27.307: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 *Oct 6 02:48:27.426: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.0.1 R1# *Oct 6 02:48:34.410: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1# *Oct 6 02:48:37.138: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.0.1 *Oct 6 02:48:37.264: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1# *Oct 6 02:48:44.360: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1# *Oct 6 02:48:46.178: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.0.1 *Oct 6 02:48:46.600: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1# *Oct 6 02:48:53.524: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1
R2#debug ip ospf hello OSPF hello debugging is on R2# R2# *Oct 6 02:48:47.310: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.1.2 R2# *Oct 6 02:48:51.068: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.2.2 R2# *Oct 6 02:48:54.237: OSPF-1 HELLO Gi0/0: Rcv hello from 1.1.1.1 area 0 192.168.1.1 R2# *Oct 6 02:48:55.734: OSPF-1 HELLO Gi0/1: Rcv hello from 3.3.3.3 area 0 192.168.2.3 R2# *Oct 6 02:48:56.744: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.1.2 R2# *Oct 6 02:49:00.369: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.2.2 R2# *Oct 6 02:49:04.133: OSPF-1 HELLO Gi0/0: Rcv hello from 1.1.1.1 area 0 192.168.1.1 *Oct 6 02:49:04.903: OSPF-1 HELLO Gi0/1: Rcv hello from 3.3.3.3 area 0 192.168.2.3 R2# *Oct 6 02:49:06.742: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.1.2 R2# *Oct 6 02:49:09.744: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.2.2 R2# *Oct 6 02:49:13.856: OSPF-1 HELLO Gi0/0: Rcv hello from 1.1.1.1 area 0 192.168.1.1 *Oct 6 02:49:13.919: OSPF-1 HELLO Gi0/1: Rcv hello from 3.3.3.3 area 0 192.168.2.3 R2# *Oct 6 02:49:16.597: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.1.2 R2# *Oct 6 02:49:19.069: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.2.2 R2# *Oct 6 02:49:23.252: OSPF-1 HELLO Gi0/0: Rcv hello from 1.1.1.1 area 0 192.168.1.1 *Oct 6 02:49:23.871: OSPF-1 HELLO Gi0/1: Rcv hello from 3.3.3.3 area 0 192.168.2.3 R2# *Oct 6 02:49:26.106: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.1.2 R2#
R3#debug ip ospf hello OSPF hello debugging is on R3# R3# *Oct 6 02:48:22.292: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3# *Oct 6 02:48:26.166: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.3.3 R3# *Oct 6 02:48:28.043: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3# *Oct 6 02:48:31.853: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3# *Oct 6 02:48:35.651: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.3.3 R3# *Oct 6 02:48:37.571: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3# *Oct 6 02:48:41.674: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3# *Oct 6 02:48:44.689: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.3.3 R3# *Oct 6 02:48:46.762: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3# *Oct 6 02:48:51.534: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3# *Oct 6 02:48:54.162: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.3.3 R3# *Oct 6 02:48:56.184: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3# *Oct 6 02:49:00.814: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3# *Oct 6 02:49:04.136: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.3.3 R3# *Oct 6 02:49:05.288: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3# *Oct 6 02:49:10.134: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3# *Oct 6 02:49:13.700: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.3.3 *Oct 6 02:49:14.311: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3# *Oct 6 02:49:19.456: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3# *Oct 6 02:49:23.223: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.3.3 R3# *Oct 6 02:49:24.251: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3# *Oct 6 02:49:28.561: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3# *Oct 6 02:49:33.040: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.3.3 *Oct 6 02:49:33.914: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3# *Oct 6 02:49:37.592: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3#
conf t router ospf 1 passive-interface gig0/0
R1(config-router)#passive-interface gig0/0 R1(config-router)# *Oct 6 02:52:12.500: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1(config-router)# *Oct 6 02:52:15.642: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1(config-router)# *Oct 6 02:52:21.996: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1(config-router)# *Oct 6 02:52:25.324: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1(config-router)# *Oct 6 02:52:31.200: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1(config-router)# *Oct 6 02:52:34.571: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1(config-router)# *Oct 6 02:52:40.490: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1(config-router)# *Oct 6 02:52:43.943: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1(config-router)# *Oct 6 02:52:50.482: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1(config-router)# *Oct 6 02:52:53.229: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1(config-router)# *Oct 6 02:52:59.672: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1(config-router)# *Oct 6 02:53:02.836: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2 R1(config-router)# *Oct 6 02:53:09.513: OSPF-1 HELLO Gi0/1: Send hello to 224.0.0.5 area 0 from 192.168.1.1 R1(config-router)# *Oct 6 02:53:12.209: OSPF-1 HELLO Gi0/1: Rcv hello from 2.2.2.2 area 0 192.168.1.2
R3(config-router)#passive-interface gig0/1 R3(config-router)# *Oct 6 02:52:20.908: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3(config-router)# *Oct 6 02:52:24.139: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3(config-router)# *Oct 6 02:52:30.457: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3(config-router)# *Oct 6 02:52:33.335: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3(config-router)# *Oct 6 02:52:40.209: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3(config-router)# *Oct 6 02:52:43.061: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3(config-router)# *Oct 6 02:52:49.420: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3(config-router)# *Oct 6 02:52:52.949: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3(config-router)# *Oct 6 02:52:58.719: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3(config-router)# *Oct 6 02:53:02.763: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3(config-router)# *Oct 6 02:53:07.911: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3(config-router)# *Oct 6 02:53:12.469: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3(config-router)# *Oct 6 02:53:17.580: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2 R3(config-router)# *Oct 6 02:53:21.996: OSPF-1 HELLO Gi0/0: Send hello to 224.0.0.5 area 0 from 192.168.2.3 R3(config-router)# *Oct 6 02:53:26.985: OSPF-1 HELLO Gi0/0: Rcv hello from 2.2.2.2 area 0 192.168.2.2
R1#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 1.1.1.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.0.1 0.0.0.0 area 0
192.168.1.1 0.0.0.0 area 0
Passive Interface(s):
Passive Interface(s):
GigabitEthernet0/0
Routing Information Sources:
Gateway Distance Last Update
3.3.3.3 110 01:45:33
Distance: (default is 110)
R1#sh ip ro ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
O 192.168.2.0/24 [110/2] via 192.168.1.2, 01:47:18, GigabitEthernet0/1
O 192.168.3.0/24 [110/3] via 192.168.1.2, 01:47:08, GigabitEthernet0/1
R3#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 3.3.3.3
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.2.3 0.0.0.0 area 0
192.168.3.3 0.0.0.0 area 0
Passive Interface(s):
GigabitEthernet0/1
Routing Information Sources:
Gateway Distance Last Update
2.2.2.2 110 01:45:54
1.1.1.1 110 01:45:54
Distance: (default is 110)
R3#sh ip ro ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
O 192.168.0.0/24 [110/3] via 192.168.2.2, 01:47:26, GigabitEthernet0/0
O 192.168.1.0/24 [110/2] via 192.168.2.2, 01:47:26, GigabitEthernet0/0
passive-interface default for Layer 3 switch
- SW1
en conf t ! hostname SW1 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! ip routing ! vlan 10,20,30,40 exit ! int vlan 10 ip address 172.16.10.1 255.255.255.0 no shut exit int vlan 20 ip address 172.16.20.1 255.255.255.0 no shut exit int vlan 30 ip address 172.16.30.1 255.255.255.0 no shut exit int vlan 40 ip address 172.16.40.1 255.255.255.0 no shut exit ! int gig0/0 switchport mode access switchport access vlan 10 exit int gig0/1 switchport mode access switchport access vlan 20 exit int gig0/2 switchport mode access switchport access vlan 30 exit int gig0/3 switchport mode access switchport access vlan 40 exit ! router ospf 1 network 172.16.10.1 0.0.0.0 area 0 network 172.16.20.1 0.0.0.0 area 0 network 172.16.30.1 0.0.0.0 area 0 network 172.16.40.1 0.0.0.0 area 0 exit ! end wr
- SW2
en conf t ! hostname SW2 no ip domain-lookup line console 0 exec-timeout 0 0 logging synchronous ! ip routing ! vlan 10,50,60,70 exit ! int vlan 10 ip address 172.16.10.2 255.255.255.0 no shut exit int vlan 50 ip address 172.16.50.2 255.255.255.0 no shut exit int vlan 60 ip address 172.16.60.2 255.255.255.0 no shut exit int vlan 70 ip address 172.16.70.2 255.255.255.0 no shut exit ! int gig0/0 switchport mode access switchport access vlan 10 exit int gig0/1 switchport mode access switchport access vlan 50 exit int gig0/2 switchport mode access switchport access vlan 60 exit int gig0/3 switchport mode access switchport access vlan 70 exit ! router ospf 1 network 172.16.10.2 0.0.0.0 area 0 network 172.16.50.2 0.0.0.0 area 0 network 172.16.60.2 0.0.0.0 area 0 network 172.16.70.2 0.0.0.0 area 0 exit ! end wr
- PC1
ip 172.16.20.101 255.255.255.0 172.16.20.1 save
- PC2
ip 172.16.30.102 255.255.255.0 172.16.30.1 save
- PC3
ip 172.16.40.103 255.255.255.0 172.16.40.1 save
- PC4
ip 172.16.50.104 255.255.255.0 172.16.50.2 save
- PC5
ip 172.16.60.105 255.255.255.0 172.16.60.2 save
- PC6
ip 172.16.70.106 255.255.255.0 172.16.70.2 save
SW1#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 11 subnets, 2 masks
C 172.16.10.0/24 is directly connected, Vlan10
L 172.16.10.1/32 is directly connected, Vlan10
C 172.16.20.0/24 is directly connected, Vlan20
L 172.16.20.1/32 is directly connected, Vlan20
C 172.16.30.0/24 is directly connected, Vlan30
L 172.16.30.1/32 is directly connected, Vlan30
C 172.16.40.0/24 is directly connected, Vlan40
L 172.16.40.1/32 is directly connected, Vlan40
O 172.16.50.0/24 [110/2] via 172.16.10.2, 00:00:31, Vlan10
O 172.16.60.0/24 [110/2] via 172.16.10.2, 00:00:31, Vlan10
O 172.16.70.0/24 [110/2] via 172.16.10.2, 00:00:31, Vlan10
SW1#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 172.16.10.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
172.16.10.1 0.0.0.0 area 0
172.16.20.1 0.0.0.0 area 0
172.16.30.1 0.0.0.0 area 0
172.16.40.1 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
172.16.10.2 110 00:01:13
Distance: (default is 110)
SW2#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 11 subnets, 2 masks
C 172.16.10.0/24 is directly connected, Vlan10
L 172.16.10.2/32 is directly connected, Vlan10
O 172.16.20.0/24 [110/2] via 172.16.10.1, 00:00:49, Vlan10
O 172.16.30.0/24 [110/2] via 172.16.10.1, 00:00:49, Vlan10
O 172.16.40.0/24 [110/2] via 172.16.10.1, 00:00:49, Vlan10
C 172.16.50.0/24 is directly connected, Vlan50
L 172.16.50.2/32 is directly connected, Vlan50
C 172.16.60.0/24 is directly connected, Vlan60
L 172.16.60.2/32 is directly connected, Vlan60
C 172.16.70.0/24 is directly connected, Vlan70
L 172.16.70.2/32 is directly connected, Vlan70
SW2#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 172.16.10.2
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
172.16.10.2 0.0.0.0 area 0
172.16.50.2 0.0.0.0 area 0
172.16.60.2 0.0.0.0 area 0
172.16.70.2 0.0.0.0 area 0
Routing Information Sources:
Gateway Distance Last Update
172.16.10.1 110 00:01:18
Distance: (default is 110)
PC-1> ping 172.16.70.106 172.16.70.106 icmp_seq=1 timeout 84 bytes from 172.16.70.106 icmp_seq=2 ttl=62 time=10.786 ms 84 bytes from 172.16.70.106 icmp_seq=3 ttl=62 time=5.702 ms 84 bytes from 172.16.70.106 icmp_seq=4 ttl=62 time=6.371 ms 84 bytes from 172.16.70.106 icmp_seq=5 ttl=62 time=5.389 ms
debug ip ospf hello undebug all
SW1#debug ip ospf hello OSPF hello debugging is on SW1# *Oct 6 03:43:40.501: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2 SW1# *Oct 6 03:43:45.567: OSPF-1 HELLO Vl40: Send hello to 224.0.0.5 area 0 from 172.16.40.1 *Oct 6 03:43:45.666: OSPF-1 HELLO Vl30: Send hello to 224.0.0.5 area 0 from 172.16.30.1 *Oct 6 03:43:45.720: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1 SW1# *Oct 6 03:43:47.735: OSPF-1 HELLO Vl20: Send hello to 224.0.0.5 area 0 from 172.16.20.1 SW1# *Oct 6 03:43:50.428: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2 SW1# *Oct 6 03:43:54.781: OSPF-1 HELLO Vl40: Send hello to 224.0.0.5 area 0 from 172.16.40.1 *Oct 6 03:43:55.108: OSPF-1 HELLO Vl30: Send hello to 224.0.0.5 area 0 from 172.16.30.1 *Oct 6 03:43:55.717: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1 SW1# *Oct 6 03:43:56.898: OSPF-1 HELLO Vl20: Send hello to 224.0.0.5 area 0 from 172.16.20.1 SW1# *Oct 6 03:44:00.194: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2 SW1# *Oct 6 03:44:04.421: OSPF-1 HELLO Vl40: Send hello to 224.0.0.5 area 0 from 172.16.40.1 *Oct 6 03:44:04.437: OSPF-1 HELLO Vl30: Send hello to 224.0.0.5 area 0 from 172.16.30.1 *Oct 6 03:44:05.313: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1 SW1# *Oct 6 03:44:06.497: OSPF-1 HELLO Vl20: Send hello to 224.0.0.5 area 0 from 172.16.20.1 SW1# *Oct 6 03:44:09.985: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
SW2#debug ip ospf hello OSPF hello debugging is on SW2# *Oct 6 03:43:43.024: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2 SW2# *Oct 6 03:43:44.030: OSPF-1 HELLO Vl70: Send hello to 224.0.0.5 area 0 from 172.16.70.2 *Oct 6 03:43:44.087: OSPF-1 HELLO Vl60: Send hello to 224.0.0.5 area 0 from 172.16.60.2 *Oct 6 03:43:44.303: OSPF-1 HELLO Vl50: Send hello to 224.0.0.5 area 0 from 172.16.50.2 SW2# *Oct 6 03:43:48.219: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1 SW2# *Oct 6 03:43:52.995: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2 *Oct 6 03:43:53.339: OSPF-1 HELLO Vl70: Send hello to 224.0.0.5 area 0 from 172.16.70.2 *Oct 6 03:43:53.392: OSPF-1 HELLO Vl60: Send hello to 224.0.0.5 area 0 from 172.16.60.2 *Oct 6 03:43:53.590: OSPF-1 HELLO Vl50: Send hello to 224.0.0.5 area 0 from 172.16.50.2 SW2# *Oct 6 03:43:58.266: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1 SW2# *Oct 6 03:44:02.600: OSPF-1 HELLO Vl70: Send hello to 224.0.0.5 area 0 from 172.16.70.2 *Oct 6 03:44:02.768: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2 *Oct 6 03:44:02.841: OSPF-1 HELLO Vl60: Send hello to 224.0.0.5 area 0 from 172.16.60.2 *Oct 6 03:44:02.873: OSPF-1 HELLO Vl50: Send hello to 224.0.0.5 area 0 from 172.16.50.2 SW2# *Oct 6 03:44:07.893: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
there is no passive interface configured, then so noisy.
conf t router ospf 1 passive-interface default no passive-interface gig0/0
SW1(config-router)#passive-interface default
SW1(config-router)#
*Oct 6 03:46:26.532: OSPF-1 HELLO Vl40: Send hello to 224.0.0.5 area 0 from 172.16.40.1
*Oct 6 03:46:26.973: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
*Oct 6 03:46:27.667: OSPF-1 HELLO Vl30: Send hello to 224.0.0.5 area 0 from 172.16.30.1
SW1(config-router)#
*Oct 6 03:46:27.867: %OSPF-5-ADJCHG: Process 1, Nbr 172.16.10.2 on Vlan10 from FULL to DOWN, Neighbor Down: Interface down or detached
SW1(config-router)#no pass
SW1(config-router)#no passive-interface gig0/0
SW1(config-router)#^Z
SW1#
*Oct 6 03:47:17.161: %SYS-5-CONFIG_I: Configured from console by console
SW1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SW1(config)#do sh run | s ospf
router ospf 1
passive-interface default
no passive-interface GigabitEthernet0/0
network 172.16.10.1 0.0.0.0 area 0
network 172.16.20.1 0.0.0.0 area 0
network 172.16.30.1 0.0.0.0 area 0
network 172.16.40.1 0.0.0.0 area 0
SW1(config)#passive-interface gig0/0
^
% Invalid input detected at '^' marker.
SW1(config)#router
SW1(config)#router ospf 1
SW1(config-router)#passive-interface gig0/0
SW1(config-router)#pass
SW1(config-router)#passive-interface vla
SW1(config-router)#passive-interface vlan 10
SW1(config-router)#no passive-interface vlan 10
SW1(config-router)#
*Oct 6 03:48:37.867: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1(config-router)#
*Oct 6 03:48:47.552: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1(config-router)#
*Oct 6 03:48:54.363: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
*Oct 6 03:48:54.364: OSPF-1 HELLO Vl10: Send immediate hello to nbr 172.16.10.2, src address 172.16.10.2
*Oct 6 03:48:54.364: OSPF-1 HELLO Vl10: Send hello to 172.16.10.2 area 0 from 172.16.10.1
*Oct 6 03:48:54.378: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
SW1(config-router)#
*Oct 6 03:48:57.176: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1(config-router)#^Z
SW1#
*Oct 6 03:49:02.080: %SYS-5-CONFIG_I: Configured from console by console
SW1#
*Oct 6 03:49:03.543: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
SW1#sh ip os
SW1#sh ip ospf
*Oct 6 03:49:06.409: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1#sh run
*Oct 6 03:49:13.458: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2s
SW1#sh run s
*Oct 6 03:49:15.512: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.
SW1#sh run | sec ip osfp
*Oct 6 03:49:23.119: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
SW1#sh run | sec ro
*Oct 6 03:49:25.003: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1#sh run | sec router ospf 1
*Oct 6 03:49:32.804: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2router ospf 1
passive-interface default
no passive-interface Vlan10
network 172.16.10.1 0.0.0.0 area 0
network 172.16.20.1 0.0.0.0 area 0
network 172.16.30.1 0.0.0.0 area 0
network 172.16.40.1 0.0.0.0 area 0
SW1#
*Oct 6 03:49:34.189: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
*Oct 6 03:49:34.342: %OSPF-5-ADJCHG: Process 1, Nbr 172.16.10.2 on Vlan10 from LOADING to FULL, Loading Done
SW1#
*Oct 6 03:49:42.561: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
SW1#
*Oct 6 03:49:43.592: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1#
*Oct 6 03:49:51.554: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
SW1#
*Oct 6 03:49:52.750: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1#
*Oct 6 03:50:01.342: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
*Oct 6 03:50:01.922: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1#
*Oct 6 03:50:10.665: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
*Oct 6 03:50:11.291: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1#
*Oct 6 03:50:19.772: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
SW1#
*Oct 6 03:50:21.056: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1#u all
*Oct 6 03:50:29.157: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.2 area 0 172.16.10.2
SW1#u all
*Oct 6 03:50:30.904: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.1
SW1#u all
All possible debugging has been turned off
SW2(config-router)#passive-interface default
SW2(config-router)#
*Oct 6 03:46:32.389: %OSPF-5-ADJCHG: Process 1, Nbr 172.16.10.1 on Vlan10 from FULL to DOWN, Neighbor Down: Interface down or detached
SW2(config-router)#no passive-interface gig0/0
SW2(config-router)#^Z
SW2#
*Oct 6 03:47:20.726: %SYS-5-CONFIG_I: Configured from console by console
SW2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SW2(config)#no passive-interface vlan 10
^
% Invalid input detected at '^' marker.
SW2(config)#router ospf 1
SW2(config-router)#no pass
SW2(config-router)#no passive-interface vlan 10
SW2(config-router)#
*Oct 6 03:48:57.598: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
*Oct 6 03:48:57.613: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
*Oct 6 03:48:57.614: OSPF-1 HELLO Vl10: Send immediate hello to nbr 172.16.10.1, src address 172.16.10.1
*Oct 6 03:48:57.614: OSPF-1 HELLO Vl10: Send hello to 172.16.10.1 area 0 from 172.16.10.2
SW2(config-router)#
*Oct 6 03:49:00.459: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2(config-router)#^Z
SW2#
*Oct 6 03:49:05.827: %SYS-5-CONFIG_I: Configured from console by console
SW2#
*Oct 6 03:49:06.803: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
SW2#
*Oct 6 03:49:09.694: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:49:16.788: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
SW2#
*Oct 6 03:49:18.865: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:49:26.494: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
SW2#
*Oct 6 03:49:28.389: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:49:36.220: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
SW2#
*Oct 6 03:49:37.628: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#sh run | sec router ospf 1
*Oct 6 03:49:37.720: %OSPF-5-ADJCHG: Process 1, Nbr 172.16.10.1 on Vlan10 from LOADING to FULL, Loading Done
SW2#sh run | sec router ospf 1
router ospf 1
passive-interface default
no passive-interface GigabitEthernet0/0
no passive-interface Vlan10
network 172.16.10.2 0.0.0.0 area 0
network 172.16.50.2 0.0.0.0 area 0
network 172.16.60.2 0.0.0.0 area 0
network 172.16.70.2 0.0.0.0 area 0
SW2#
*Oct 6 03:49:46.043: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
SW2#
*Oct 6 03:49:47.107: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:49:55.062: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
SW2#
*Oct 6 03:49:56.262: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:50:04.864: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
*Oct 6 03:50:05.458: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:50:14.175: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
*Oct 6 03:50:14.820: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:50:23.307: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
SW2#
*Oct 6 03:50:24.564: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:50:32.663: OSPF-1 HELLO Vl10: Send hello to 224.0.0.5 area 0 from 172.16.10.2
SW2#u all
All possible debugging has been turned off
SW2#
*Oct 6 03:50:34.414: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#
*Oct 6 03:50:34.414: OSPF-1 HELLO Vl10: Rcv hello from 172.16.10.1 area 0 172.16.10.1
SW2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SW2(config)#router ospf 1
SW2(config-router)#pas
SW2(config-router)#passive-interface gig
SW2(config-router)#passive-interface gigabitEthernet 0/0
SW2(config-router)#^Z
SW2#
*Oct 6 03:52:57.061: %SYS-5-CONFIG_I: Configured from console by console
SW2#sh run | sec router ospf 1
router ospf 1
passive-interface default
no passive-interface Vlan10
network 172.16.10.2 0.0.0.0 area 0
network 172.16.50.2 0.0.0.0 area 0
network 172.16.60.2 0.0.0.0 area 0
network 172.16.70.2 0.0.0.0 area 0
Traffic Black hole…
PC-1> ping 172.16.70.106 172.16.70.106 icmp_seq=1 timeout 172.16.70.106 icmp_seq=2 timeout 172.16.70.106 icmp_seq=3 timeout 172.16.70.106 icmp_seq=4 timeout 172.16.70.106 icmp_seq=5 timeout
another side subnet ping successful.
PC-1> ping 172.16.60.105 84 bytes from 172.16.60.105 icmp_seq=1 ttl=62 time=22.581 ms 84 bytes from 172.16.60.105 icmp_seq=2 ttl=62 time=5.663 ms 84 bytes from 172.16.60.105 icmp_seq=3 ttl=62 time=5.912 ms 84 bytes from 172.16.60.105 icmp_seq=4 ttl=62 time=10.730 ms 84 bytes from 172.16.60.105 icmp_seq=5 ttl=62 time=5.658 ms
reconfigure PC-6 now works.
172.16.70.106 icmp_seq=58 timeout 84 bytes from 172.16.70.106 icmp_seq=59 ttl=62 time=9.127 ms 84 bytes from 172.16.70.106 icmp_seq=60 ttl=62 time=13.600 ms 84 bytes from 172.16.70.106 icmp_seq=61 ttl=62 time=5.408 ms 172.16.70.106 icmp_seq=62 timeout 172.16.70.106 icmp_seq=63 timeout 84 bytes from 172.16.70.106 icmp_seq=64 ttl=62 time=9.775 ms 84 bytes from 172.16.70.106 icmp_seq=65 ttl=62 time=6.708 ms 84 bytes from 172.16.70.106 icmp_seq=66 ttl=62 time=10.058 ms 84 bytes from 172.16.70.106 icmp_seq=67 ttl=62 time=5.520 ms ^C
SW1#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 172.16.10.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
172.16.10.1 0.0.0.0 area 0
172.16.20.1 0.0.0.0 area 0
172.16.30.1 0.0.0.0 area 0
172.16.40.1 0.0.0.0 area 0
Passive Interface(s):
Vlan20
Vlan30
Vlan40
Routing Information Sources:
Gateway Distance Last Update
172.16.10.2 110 00:02:29
Distance: (default is 110)
SW1#sh ip ospf int vlan 10
Vlan10 is up, line protocol is up
Internet Address 172.16.10.1/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 172.16.10.1, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 172.16.10.2, Interface address 172.16.10.2
Backup Designated router (ID) 172.16.10.1, Interface address 172.16.10.1
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:08
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 172.16.10.2 (Designated Router)
Suppress hello for 0 neighbor(s)
SW2#sh ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 172.16.10.2
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
172.16.10.2 0.0.0.0 area 0
172.16.50.2 0.0.0.0 area 0
172.16.60.2 0.0.0.0 area 0
172.16.70.2 0.0.0.0 area 0
Passive Interface(s):
Vlan50
Vlan60
Vlan70
Routing Information Sources:
Gateway Distance Last Update
172.16.10.1 110 00:09:56
Distance: (default is 110)
SW2#sh ip ospf int vlan 10
Vlan10 is up, line protocol is up
Internet Address 172.16.10.2/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 172.16.10.2, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 172.16.10.2, Interface address 172.16.10.2
Backup Designated router (ID) 172.16.10.1, Interface address 172.16.10.1
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:03
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 1 msec, maximum is 1 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 172.16.10.1 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
SW2#sh ip ospf int vlan 20
^
% Invalid input detected at '^' marker.
SW2#sh ip ospf int vlan 50
Vlan50 is up, line protocol is up
Internet Address 172.16.50.2/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 172.16.10.2, Network Type BROADCAST, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 172.16.10.2, Interface address 172.16.50.2
No backup designated router on this network
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
No Hellos (Passive interface)
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 2/2, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 0, maximum is 0
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 0, Adjacent neighbor count is 0
Suppress hello for 0 neighbor(s)
no router ospf 1
command deletes all subsequent configuration!!(e.g. network)
References
tech/network/cisco/ospf/ospf/ospf-basic/ospf-basic.txt · Last modified: 2018/10/07 16:09 by wnoguchi
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