Connectivity Guide

8 Congure VLT port-channels between VLT peers and an attached device using the vlt-port-channel command. Assign the
same VLT port-channel ID from 1 to 1024 to interfaces on dierent peers that you bundle together. The peer interfaces appear as a
single VLT LAG to downstream devices.
9 Connect peer devices in a VLT domain to an attached access device or server.
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 same on both VLT peer nodes.
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
Virtual Link Trunking
1041