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
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
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
ip 192.168.0.101 255.255.255.0 192.168.0.1 save
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
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
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
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)
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
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
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
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
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
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
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
ip 172.16.1.101 255.255.255.0 172.16.1.1 save
ip 172.16.5.102 255.255.255.0 172.16.5.2 save
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
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
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
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
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
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
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
ip 192.168.0.101 255.255.255.0 192.168.0.1 save
ip 192.168.3.102 255.255.255.0 192.168.3.3 save
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
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
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
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
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
ip 172.16.20.101 255.255.255.0 172.16.20.1 save
ip 172.16.30.102 255.255.255.0 172.16.30.1 save
ip 172.16.40.103 255.255.255.0 172.16.40.1 save
ip 172.16.50.104 255.255.255.0 172.16.50.2 save
ip 172.16.60.105 255.255.255.0 172.16.60.2 save
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
)