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## Configure the Multicast Router Port Time-Out Value

Configuring the multicast router port time-out value sets the IGS router port-purge time-out value, after which the port gets deleted if no IGMP router control packets are received. Before you can configure IGS features, you must configure your network environment, as described in Topology Example.

1. Configure the multicast router port time-out value.

       SEFOS# configure terminal
       SEFOS(config)# ip igmp snooping mrouter-time-out 60
       SEFOS(config)# end

   Dynamically learned `mrouter` entries are deleted after 60 seconds.

2. Review the configuration.

       SEFOS# show ip igmp snooping globals

       Snooping Configuration
       -----------------------------
       IGMP Snooping globally enabled
       IGMP Snooping is operationally enabled
       IGMP Snooping Enhanced mode is disabled
       Transmit Query on Topology Change globally disabled
       Multicast forwarding mode is MAC based
       Proxy globally disabled
       Proxy reporting globally enabled
       Filter is disabled
       Router port purge interval is 60 seconds
       Port purge interval is 260 seconds
       Report forward interval is 5 seconds
       Group specific query interval is 2 seconds
       Reports are forwarded on router ports
       Group specific query retry count is 2
       Multicast VLAN disabled
       Leave config level is Vlan based

   Statically configured router ports are not deleted after the expiration of the router purge-time interval.

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