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Command Reference Guide Demand Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 810
ip igmp
Use the ip igmp command to configure multicasting-related functions for the interface.
Applicable Platforms
This command applies to the NetVanta 1000R, 3000, 4000, and 5000 Series units.
Syntax Description
immediate-leave If only one host (or IGMP snooping switch) is connected to the interface,
when a leave is received, multicast of that group is immediately
terminated as opposed to sending a group query and timing out the
group if no device responds. Works in conjunction with ip igmp
last-member-query-interval. Applies to all groups when configured.
last-member-query-interval
<milliseconds>
Controls the timeout used to detect whether any group receivers remain
on an interface after a receiver leaves a group. If a receiver sends a
leave group message (IGMP Version 2), the router sends a
group-specific query on that interface. After twice the time specified by
this command plus as much as one second longer, if no receiver
responds, the router removes that interface from the group and stops
sending that group's multicast packets to the interface. Range: 100 to
65535 ms. Default: 1000 ms.
querier-timeout <seconds> Specifies the number of seconds that the router waits after the current
querier’s last query before it takes over as querier (IGMP V2). Range: 60
to 300 seconds. Default: 2x the query-interval value.
query-interval
<seconds >
Specifies the interval at which IGMP queries are sent on an interface.
Host query messages are addressed to the all-hosts multicast group
with an IP TTL of 1. The router uses queries to detect whether multicast
group members are on the interface and to select an IGMP designated
router for the attached segment (if more than one multicast router
exists). Only the designated router for the segment sends queries. For
IGMP V2, the designated router is the router with the lowest IP address
on the segment. Range: 0 to 65,535 seconds. Default: 60 seconds.
query-max-response-time
<seconds>
Specifies the maximum response time advertised by this interface in
queries when using IGMP V2. Hosts are allowed a random time within
this period to respond, reducing response bursts. Default: 10 seconds.
static-group
<group-address>
Configures the router's interface to be a statically-connected member of
the specified group. Packets received on the correct RPF interface are
forwarded to this interface regardless of whether any receivers have
joined the specified group using IGMP.
version [1 | 2] Sets the interface’s IGMP version. The default setting is version 2.