Configuring Multicast Snooping to Ignore Spanning Tree Topology Change Messages

date_range 23-Nov-23

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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:

Configure the spanning-tree protocol. For configuration details, see one of the following topics:
Configure VPLS root protection. For configuration details, see one of the following topics:
- Configuring VPLS Root Protection Topology Change Actions to Control Individual VLAN Spanning-Tree Behavior

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

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-name user@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-name user@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 on MX Series Routers.
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
```

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# top
user@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;
            }
        }
    }
}

arrow_backward PREVIOUS Example: Configuring Multicast Snooping for a Bridge Domain

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Multicast Protocols User Guide

Configuring Multicast Snooping to Ignore Spanning Tree Topology Change Messages

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Configuring Multicast Snooping to Ignore Spanning Tree Topology Change Messages

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