Intel 460T manual Configure Igmp Snooping

C H A P T E R 5 Using Local Management

Configure IGMP Snooping

Local Management

LOCATION

Main Menu

Configure Device

Forwarding and Filtering

IGMP Snooping

NOTE

If tag-based (IEEE 802.1Q) or port- based VLANs are currently run- ning, you must enable IGMP snooping for each VLAN. The switch supports up to 12 VLAN IGMP snooping sessions.

Description

IGMP Snooping (Internet Group Management Protocol) 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. 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 screen.

IGMP Snooping state: Use the zto enable or disable IGMP Snooping.

IGMP Snooping age-out timer: Specify the acceptable time (in seconds) between IGMP queries, starting when 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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