Spanning-tree protocols: Turn off spanning-tree interface state

By default, the IGMP snooping process is aware of topology changes made by any of the spanning-tree protocols (STPs). The default behavior for the IGMP snooping process can be changed to ignore the spanning-tree topology change messages. To ignore the spanning-tree topology change messages, include the ignore-stp-topology-change statement at the [edit routing-instances routing-instance-name bridge-domains bridge-domain-name multicast-snooping-options] hierarchy level.