Dell PowerConnect 8100 CLI Reference Guide - Page 527
Default Configuration, Command Mode, User Guidelines, Example, show ipv6 mld snooping
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Default Configuration MLD Snooping is enabled globally and on all VLANs by default. Command Mode Global Configuration mode. User Guidelines Use this command without parameters to globally enable MLD Snooping. Use the no form of the command to disable MLD Snooping. Use the vlan parameter to enable MLD Snooping on a specific VLAN. It is recommended that IGMP snooping should be enabled whenever MLD snooping is enabled to ensure that unwanted pruning of multicast protocol packets used by other protocols does not occur. If a multicast source is connected to a VLAN on which both L3 multicast and IGMP/MLD snooping are enabled, the multicast source is forwarded to the mrouter ports that have been discovered when the multicast source is first seen. If a new mrouter is later discovered on a different port, the multicast source data is not forwarded to the new port. Likewise, if an existing mrouter times out or stops querying, the multicast source data continues to be forwarded to that port. If a host in the VLAN subsequently joins or leaves the group, the list of mrouter ports is updated for the multicast source and the forwarding of the multicast source is adjusted. The workaround to this limitation is to statically configure mrouter ports when enabling IGMP/MLD snooping in L3 multicast enabled VLANs. Example console(config)#ipv6 mld snooping console(config)#no ipv6 mld snooping vlan 1 show ipv6 mld snooping The show ipv6 mld snooping command displays MLD Snooping information. Configured information is displayed whether or not MLD Snooping is enabled. IPv6 MLD Snooping Commands 527
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