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37 MULTICAST FILTERING COMMANDS
This switch uses IGMP (Internet Group Management Protocol) to check for
any attached hosts that want to receive a specific multicast service. It
identifies the ports containing hosts requesting a service and sends data
out to those ports only. It then propagates the service request up to any
neighboring multicast switch/router to ensure that it will continue to
receive the multicast service.
IGMP SNOOPING
This section describes commands used to configure IGMP snooping on the
switch.
Table 121: Multicast Filtering Commands
Command Group Function
IGMP Snooping Configures multicast groups via IGMP snooping or static
assignment, sets the IGMP version, enables proxy reporting,
displays current snooping settings, and displays the multicast
service and group members
Static Multicast Routing Configures static multicast router ports which forward all inbound
multicast traffic to the attached VLANs
IGMP Filtering and
Throttling
Configures IGMP filtering and throttling
Multicast VLAN
Registration
Configures a single network-wide multicast VLAN shared by hosts
residing in other standard or private VLAN groups, preserving
security and data isolation for normal traffic
Table 122: IGMP Snooping Commands
Command Function Mode
ip igmp snooping Enables IGMP snooping GC
ip igmp snooping proxy-
reporting
Enables IGMP Snooping with Proxy Reporting GC
ip igmp snooping querier Allows this device to act as the querier for IGMP
snooping
GC
ip igmp snooping router-
alert-option-check
Discards any IGMPv2/v3 packets that do not include
the Router Alert option
GC
ip igmp snooping router-
port-expire-time
Configures the querier timeout GC
ip igmp snooping tcn-
flood
Floods multicast traffic when a Spanning Tree topology
change occurs
GC
ip igmp snooping tcn-
query-solicit
Sends an IGMP Query Solicitation when a Spanning
Tree topology change occurs
GC
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