Users Guide

NOTE: To view all other ports, use the show spanning-tree active command.
View STP virtual interface detail
OS10# show spanning-tree virtual-interface detail
Port 1 (VFP(VirtualFabricPort)) of RSTP 1 is designated Forwarding
Port path cost 1, Port priority 0, Port Identifier 0.1
Designated root priority: 32768, address: 00:78:76:14:60:62
Designated bridge priority: 32768, address: 00:78:76:14:60:62
Designated port ID: 0.1, designated path cost: 0
Number of transitions to forwarding state: 1
Edge port: No (default)
Link Type: Point-to-Point
BPDU Sent: 15, Received: 5
MSTP conguration
When you enable Multiple Spanning Tree Protocol (MSTP) on VLT nodes, congure both VLT peer nodes in the same MST region to avoid
network loops. Ensure that the VLAN-to-instance mappings, region name, and revision ID are the same on both VLT peer nodes.
NOTE: OS10 supports a maximum of 64 MST instances.
To congure MSTP over VLT, follow these steps on both VLT peer nodes:
1 Enable MSTP.
CONFIGURATION mode
spanning-tree mode mst
2 Enter MST conguration mode.
CONFIGURATION mode
spanning tree mst configuration
3 Create an MST instance and add multiple VLANs as required.
MULTIPLE-SPANNING-TREE
instance instance-number vlan from-vlan-id — to-vlan-id
4 Congure the MST revision number, from 0 to 65535.
MULTIPLE-SPANNING-TREE
revision revision-number
5 Congure the MST region name.
MULTIPLE-SPANNING-TREE
name name-string
The following example shows that both VLT nodes are congured with the same MST VLAN-to-instance mapping.
VLT Peer 1 confoguration
OS10(config)# spanning-tree mode mst
OS10(config)# spanning-tree mst configuration
OS10(conf-mst)# instance 1 vlan 2-10
OS10(conf-mst)# revision 10
OS10(conf-mst)# name ExampleMSTregion
VLT Peer 2 confoguration
OS10(config)# spanning-tree mode mst
OS10(config)# spanning-tree mst configuration
OS10(conf-mst)# instance 1 vlan 2-10
OS10(conf-mst)# revision 10
OS10(conf-mst)# name ExampleMSTregion
Virtual Link Trunking
1203