Technical Documentation

Configuring Multicast Snooping to Ignore Spanning Tree Topology Change Messages

You can configure the multicast snooping process for a virtual switch to ignore VPLS root protection topology change messages.

Before you begin, complete the following tasks:

  1. Configure the spanning-tree protocol. For configuration details, see one of the following topics:

  2. Configure VPLS root protection. For configuration details, see one of the following topics:

To configure multicast snooping to ignore spanning tree topology change messages:

  1. Configure a virtual-switch routing instance to isolate a LAN segment with its VSTP instance.

    1. Enable configuration of a virtual switch routing instance:

      [edit]user@host# edit routing-instances routing-instance-nameuser@host# set instance-type virtual-switch
      You can configure multicast snooping to ignore messages about spanning tree topology changes for the virtual-switch routing-instance type only.
    2. Enable configuration of a bridge domain:

      [edit routing-instances routing-instance-name]user@host# edit bridge-domains bridge-domain-nameuser@host# set domain-type bridge
    3. Configure the logical interfaces for the bridge domain in the virtual switch:

      [edit routing-instances routing-instance-name bridge-domains bridge-domain-name]user@host# set interface interface-name
    4. Configure the VLAN identifiers for the bridge domain in the virtual switch. For detailed information, see Configuring a Virtual Switch Routing Instance.
  2. Configure the multicast snooping process to ignore any spanning tree topology change messages sent to the virtual switch routing instance:

    [edit routing-instances routing-instance-name bridge-domains bridge-domain-name]user@host# set multicast-snooping-options ignore-stp-topology-change
  3. Verify the configuration of multicast snooping for the virtual-switch routing instance to ignore spanning tree topology change messages:

    [edit routing-instances routing-instance-name bridge-domains bridge-domain-name]user@host# topuser@host# show routing-instances routing-instance-name {instance-type virtual-switch;bridge-domains {bridge-domain-name {domain-type bridge {interface interface-name;...VLAN-identifiers-configuration...multicast-snooping-options {ignore-stp-topology-change;}}}}

Published: 2010-05-11