ADTRAN 1000R Series

Command Reference Guide ATM Sub-Interfa c e Config 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, and 4000 Series units.

Syntax Description

immediate-leave S pecifies that if only one host (or IGMP snooping swit ch) is connecte d to

the interface, when a leave is received, multicast of that group is

immediately terminated as opp osed to sending a group que ry 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 d etect whether any gro up receivers re main

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 qu ery on that interface. After twice the time specified by

this command plus as much as one secon d 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 querie r (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 se nds 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 seco nds.

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 r outer's interface to be a statically-connected member 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.