ADTRAN 1000R Series

Command Reference Guide HDLC 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, 3000, 4000, and 5000 and Total Access 900 Series

units.

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 multicast packets to the interface. 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: 60-300

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.