Users Guide

Table Of Contents
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 configuration
When you enable Multiple Spanning Tree Protocol (MSTP) on VLT nodes, configure 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 configure MSTP over VLT, follow these steps on both VLT peer nodes:
1. Enable MSTP.
CONFIGURATION mode
spanning-tree mode mst
2. Enter MST configuration 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. Configure the MST revision number, from 0 to 65535.
MULTIPLE-SPANNING-TREE
revision revision-number
5. Configure the MST region name.
MULTIPLE-SPANNING-TREE
name name-string
The following example shows that both VLT nodes are configured 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
The following example shows MSTP information on VLTi:
NOTE: To view all the other ports, use the show spanning-tree active or show spanning-tree msti command.
OS10# show spanning-tree virtual-interface
VFP(VirtualFabricPort) of MSTI 0 is Designated Forwarding
Edge port: No (default)
Link type: point-to-point (auto)
Boundary: Yes, Bpdu-filter: Disable, Bpdu-Guard: Disable, Shutdown-on-Bpdu-Guard-violation: No
Root-Guard: Disable, Loop-Guard: Disable
Virtual Link Trunking
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