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LOCATION
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Configure Device
Forwarding and Filtering
IGMP Snooping
NOTE
If tag-based (IEEE 802.1Q) or
port-based VLANs are currently
running, you must enable IGMP
snooping per VLAN. The switch
supports a maximum of 12 VLAN
IGMP snooping sessions.
460T Ch5 - Sec 1-Nav & Config.p65
R
5
Using Local Management
Configure IGMP Snooping
Description
IGMP Snooping (Internet Group Management Protocol) is a feature that
allows the switch to forward multicast traffic intelligently. The switch
"snoops" the IGMP query and report messages and forwards traffic only to
the ports that request the multicast traffic. This prevents the switch from
broadcasting the traffic to all ports and possibly affecting network
performance.
IGMP requires a router that learns about the presence of multicast groups
on its subnets and keeps track of group membership. It is important to
remember that multicasting is not connection oriented, so data is delivered
to the requesting hosts on a best-effort level of service.
VLAN Name (port-based or tag-based VLANs only): The VLAN for
which IGMP snooping is enabled. You can also enable IGMP snooping for
a VLAN in the Configure VLAN section.
IGMP Snooping state: Use the z to enable or disable IGMP
Snooping.
IGMP Snooping age-out timer: Specify the acceptable time (in seconds)
between IGMP queries since the switch last received an IGMP query from
the multicast server. The default time is 300 seconds. A query allows the
server to determine which network hosts are (or want to be) part of the IP
multicast group, and are configured and ready to receive traffic for the
given application.
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