ADTRAN 1000R Series

Command Reference Guide Loopback Interface Configuration Command Set

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 conn ected 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-sp ecific query on that inte rf ac e. After twice the time

specified by this command plus as much as one second longer, if no

receiver responds, the r outer r emove s that inte rface fr om the gr oup a nd

stops sending that group' s mu ltica st packets to the interfac e.

Range: 100 to 65535 ms. Default: 1000 ms.

querier-timeout <seconds> Number of seconds that the rou ter 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 inte rface. Host query

messages are addr essed to the all-ho st s multicast gr oup with an IP T TL

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 att ached segment ( if more than one mu lticast router exist s ). Only

the designated router for the segment sends queries. For IGMP V2, the

designated router is the r outer 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 in terface in queries when

using IGMP V2. Hosts are allowed a random time within this period to

respond, reducing response bu rsts. Default: 10 seconds.

static-group

<group-address> Configures the r outer's interface to be a statically-connected memb er of

the specified group. Packets received on the correct RPF interface are

forwarded to this inte r face regardle ss of whet he r an y re ce iv er s ha ve

joined the specified group using IGMP.

version [1 | 2] Sets the interface’s IGMP version. The default setting is version 2.