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Command Reference Guide Loopback Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 996
ip igmp
Use the ip igmp command to configure multicasting-related functions for the interface.
Applicable Platforms
This command applies to the NetVanta 300, 1000R, 2000, 3000, 4000, and 5000 and Total Access 900
Series units.
Command History
Release 7.1 Command was introduced.
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>
This command 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> 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 >
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 65535 seconds. Default: 60 seconds.
query-max-response-time
<seconds>
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.