tech:network:cisco:stp:mstp:inter-region-mstp:inter-region-mstp
Table of Contents
Inter Region MSTP
Topology
Base Configuration
- SW1
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 1/0/1-2 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! end
- SW2
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 1/0/1-2 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! interface FastEthernet 1/0/5 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! interface FastEthernet 1/0/7 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! end
- SW3
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 1/0/1-2 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! interface FastEthernet 1/0/8 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! end
- SW5
configure terminal ! vlan 1-18 exit ! interface FastEthernet 1/0/6 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! end
- SW6
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 0/1-2 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate exit ! interface FastEthernet 0/7 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! end
- SW7
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 0/1-2 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate exit ! interface FastEthernet 0/8 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! end
- SW8
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 0/1-2 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate ! end
- SW9
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 0/1-2 switchport mode trunk switchport nonegotiate ! interface FastEthernet 0/8 switchport mode trunk switchport nonegotiate ! end
- SW10
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 0/1-2 switchport mode trunk switchport nonegotiate ! end
- SW11
configure terminal ! vlan 1-18 exit ! interface range FastEthernet 0/1-2 switchport mode trunk switchport nonegotiate ! interface FastEthernet 0/7 switchport mode trunk switchport nonegotiate ! end
show vlan brief
MSTP 802.1s Configuration
- SW1
configure terminal ! spanning-tree mst configuration instance 1 vlan 1-3 instance 2 vlan 4-6 name RegionA revision 1 show pending exit ! spanning-tree mode mst ! spanning-tree mst 0 priority 0 spanning-tree mst 1 priority 0 spanning-tree mst 2 priority 0 ! end
- SW2, 3
configure terminal ! spanning-tree mst configuration instance 1 vlan 1-3 instance 2 vlan 4-6 name RegionA revision 1 show pending exit ! spanning-tree mode mst ! end
- SW6
configure terminal ! spanning-tree mst configuration instance 1 vlan 7-9 instance 2 vlan 10-12 name RegionB revision 1 show pending exit ! spanning-tree mode mst ! spanning-tree mst 0 priority 1 spanning-tree mst 1 priority 0 spanning-tree mst 2 priority 0 ! end
- SW7, 8
configure terminal ! spanning-tree mst configuration instance 1 vlan 7-9 instance 2 vlan 10-12 name RegionB revision 1 show pending exit ! spanning-tree mode mst ! end
- SW9
configure terminal ! spanning-tree mst configuration instance 1 vlan 13-15 instance 2 vlan 16-18 name RegionC revision 1 show pending exit ! spanning-tree mode mst ! spanning-tree mst 0 priority 2 spanning-tree mst 1 priority 0 spanning-tree mst 2 priority 0 ! end
- SW10, 11
configure terminal ! spanning-tree mst configuration instance 1 vlan 13-15 instance 2 vlan 16-18 name RegionC revision 1 show pending exit ! spanning-tree mode mst ! end
- SW5
configure terminal ! spanning-tree mode pvst ! end
- SW1-3, 6-11
clear spanning-tree detected-protocols
show spanning-tree mst
- ASW1
ping 172.16.1.2 source 172.16.1.1 repeat 100000000
- ASW2
ping 172.16.4.1 source 172.16.4.2 repeat 100000000
debug spanning-tree events
External Region
Catalyst 2960 series switch say cannnot create vlans 1-180.
SW9#conf t Enter configuration commands, one per line. End with CNTL/Z. SW9(config)#vlan 1-18 Insufficient core memory to allocate new VLAN(s) 503 - 600 SW9(config-vlan)#exit Proposed configuration has too many VLANs for this device's core memory resources. Either reduce the number of VLANs proposed or use another VTP device to configure database. (The latter will cause this device to enter TRANSPARENT mode automatically if propagated to it.) APPLY VLAN changes failed. SW9(config)#
vlan 1 over 18 creation is successful.
SW11(config)#do sh vlan brief
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4
Fa0/5, Fa0/6, Fa0/7, Fa0/8
Gi0/1
2 VLAN0002 active
3 VLAN0003 active
4 VLAN0004 active
5 VLAN0005 active
6 VLAN0006 active
7 VLAN0007 active
8 VLAN0008 active
9 VLAN0009 active
10 VLAN0010 active
11 VLAN0011 active
12 VLAN0012 active
13 VLAN0013 active
14 VLAN0014 active
15 VLAN0015 active
16 VLAN0016 active
17 VLAN0017 active
18 VLAN0018 active
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
following output is IST 0 priority misconfiguration version.
SW11#sh spanning-tree mst
##### MST0 vlans mapped: 1-12,19-4094
Bridge address 0026.ca6b.e980 priority 32768 (32768 sysid 0)
Root address 0017.9549.5480 priority 0 (0 sysid 0)
port Fa0/7 path cost 200000
Regional Root this switch
Operational hello time 2 , forward delay 15, max age 20, txholdcount 6
Configured hello time 2 , forward delay 15, max age 20, max hops 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1 Desg FWD 200000 128.1 P2p
Fa0/2 Desg FWD 200000 128.2 P2p
Fa0/7 Root FWD 200000 128.7 P2p Bound(RSTP)
##### MST1 vlans mapped: 13-15
Bridge address 0026.ca6b.e980 priority 32769 (32768 sysid 1)
Root address 001a.a10c.d380 priority 1 (0 sysid 1)
port Fa0/1 cost 200000 rem hops 19
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1 Root FWD 200000 128.1 P2p
Fa0/2 Altn BLK 200000 128.2 P2p
Fa0/7 Mstr FWD 200000 128.7 P2p Bound(RSTP)
##### MST2 vlans mapped: 16-18
Bridge address 0026.ca6b.e980 priority 32770 (32768 sysid 2)
Root address 001a.a10c.d380 priority 2 (0 sysid 2)
port Fa0/1 cost 200000 rem hops 19
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1 Root FWD 200000 128.1 P2p
Fa0/2 Altn BLK 200000 128.2 P2p
Fa0/7 Mstr FWD 200000 128.7 P2p Bound(RSTP)
SW2#sh spanning-tree mst 0
##### MST0 vlans mapped: 7-4094
Bridge address c08c.6045.5200 priority 32768 (32768 sysid 0)
Root address 0017.9549.5480 priority 0 (0 sysid 0)
port Fa1/0/1 path cost 200000
Regional Root address dc7b.948d.f700 priority 32768 (32768 sysid 0)
internal cost 200000 rem hops 19
Operational hello time 2 , forward delay 15, max age 20, txholdcount 6
Configured hello time 2 , forward delay 15, max age 20, max hops 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa1/0/1 Root FWD 200000 128.3 P2p
Fa1/0/2 Altn BLK 200000 128.4 P2p
Fa1/0/5 Desg FWD 200000 128.7 P2p Bound(PVST)
Fa1/0/7 Altn BLK 200000 128.9 P2p Bound(RSTP)
SW5#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 0
Address 0017.9549.5480
Cost 200019
Port 8 (FastEthernet1/0/6)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0064.404b.6e00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa1/0/6 Root FWD 19 128.8 P2p
VLAN0002
Spanning tree enabled protocol ieee
Root ID Priority 0
Address 0017.9549.5480
Cost 200019
Port 8 (FastEthernet1/0/6)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32770 (priority 32768 sys-id-ext 2)
Address 0064.404b.6e00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa1/0/6 Root FWD 19 128.8 P2p
SW1#sh spanning-tree mst 0
##### MST0 vlans mapped: 7-4094
Bridge address e8ed.f315.9380 priority 0 (0 sysid 0)
Root address 0017.9549.5480 priority 0 (0 sysid 0)
port Fa1/0/2 path cost 200000
Regional Root address dc7b.948d.f700 priority 32768 (32768 sysid 0)
internal cost 200000 rem hops 19
Operational hello time 2 , forward delay 15, max age 20, txholdcount 6
Configured hello time 2 , forward delay 15, max age 20, max hops 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa1/0/1 Desg FWD 200000 128.3 P2p
Fa1/0/2 Root FWD 200000 128.4 P2p
Fa1/0/24 Desg FWD 200000 128.26 P2p
SW1#
SW6#sh spanning-tree mst 0 ##### MST0 vlans mapped: 1-6,13-4094 Bridge address 0017.9549.5480 priority 0 (0 sysid 0) Root this switch for the CIST Operational hello time 2 , forward delay 15, max age 20, txholdcount 6 Configured hello time 2 , forward delay 15, max age 20, max hops 20 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Fa0/1 Desg FWD 200000 128.3 P2p Fa0/2 Desg FWD 200000 128.4 P2p Fa0/7 Desg FWD 200000 128.9 P2p
References
tech/network/cisco/stp/mstp/inter-region-mstp/inter-region-mstp.txt · Last modified: 2019/07/10 08:13 by wnoguchi
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
