Connectivity Guide
8 Congure 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 dierent 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 conguration
When you enable Multiple Spanning Tree Protocol (MSTP) on VLT nodes, congure 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 congure MSTP over VLT, follow these steps on both VLT peer nodes:
1 Enable MSTP.
CONFIGURATION mode
spanning-tree mode mst
2 Enter MST conguration 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 Congure the MST revision number, from 0 to 65535.
MULTIPLE-SPANNING-TREE
revision revision-number
5 Congure the MST region name.
MULTIPLE-SPANNING-TREE
name name-string
The following example shows that both VLT nodes are congured with the same MST VLAN-to-instance mapping..
VLT Peer 1 confoguration
OS10(config)# spanning-tree mode mst
Virtual Link Trunking
1041