31.2.4 Configuring Ring Protocol and Multiple Spanning Tree together

Points to note

When the Ring Protocol and Multiple Spanning Tree are used together, the VLAN IDs to be used together need to be set in a VLAN mapping. In this case, the VLAN ID specified for the VLAN mapping and the VLAN ID specified for the VLAN belonging to the MST instance must match. If the VLAN mapping and VLAN ID for the VLAN belonging to the MST instance do not match, all ports for the VLAN that does not match will be in the Blocking status.

Command examples

1. (config)# axrp vlan-mapping 1 vlan 10,20,30

   Sets a VLAN mapping ID of 1, and sets VLAN IDs 10, 20, and 30 to be used together with MST instance 10.

2. (config)# axrp vlan-mapping 2 vlan 40,50

   Sets a VLAN mapping ID of 2, and sets VLAN IDs 40 and 50 to be used together with MST instance 20.

3. (config)# axrp 1

   (config-axrp)# vlan-group 1 vlan-mapping 1-2

   (config-axrp)# exit

   Sets VLAN mapping IDs 1 and 2 for VLAN group 1.

4. (config)# spanning-tree mst configuration

   (config-mst)# instance 10 vlans 10,20,30

   Sets VLAN IDs 10, 20, and 30 specified for vlan-mapping 1, for the VLAN belonging to MST instance 10, and starts usage with the Ring Protocol.

5. (config-mst)# instance 20 vlans 40,50

   Sets VLAN IDs 40 and 50 specified for vlan-mapping 2, for the VLAN belonging to MST instance 20, and starts usage with the Ring Protocol.