Chapter 14
| Multicast Filtering
Layer 3 IGMP (Query used with Multicast Routing)
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source addresses, except for those listed in the exclude source-list and for any
other sources where the source timer status has expired.
◆ Filter Timer Elapse – The Filter timer is only used when a specific multicast
address is in Exclude mode. It represents the time for the multicast address
filter mode to expire and change to Include mode.
◆ Request List – Sources included on the router’s request list.
◆ Exclude List – Sources included on the router’s exclude list.
Web Interface
To display known MLD multicast groups:
1. Click Multicast, MLD Snooping, Group Information.
2. Select the port or trunk, and then select a multicast service assigned to that
interface.
Figure 364: Showing IPv6 Multicast Services and Corresponding Sources
Layer 3 IGMP (Query used with Multicast Routing)
IGMP Snooping – IGMP Snooping (page 542) is a key part of the overall set of
functions required to support multicast filtering. It is used to passively monitor
IGMP service requests from multicast clients, and dynamically configure the switch
ports which need to forward multicast traffic.
IGMP Query – Multicast query is used to poll each known multicast group for active
members, and dynamically configure the switch ports which need to forward
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