HP 7000 dl Router manual Copyright 2005 Hewlett-Packard Development Company, L.P 677

SROS Command Line Interface Reference GuideATM Sub-Interface Config Command Set

ip igmp

Use the ip igmp command to configure multicasting-related functions for the interface.

Syntax Description

helper-enable	Tells this downstream interface to use the global helper address.
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	This command controls the timeout used to detect whether any group
<milliseconds>	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: 60-300
	seconds. Default: 2x the query-intervalvalue.
query-interval	Interval at which IGMP queries are sent on an interface. Host query
<seconds >	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	Maximum response time advertised by this interface in queries when
<seconds>	using IGMP V2. Hosts are allowed a random time within this period to
	respond, reducing response bursts. Default: 10 seconds.
static-group	Configures the router's interface to be a statically-connected member of
<group-address>	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.

Command Modes

(config-interface)#	Interface Configuration Mode
	Valid interfaces include: ATM sub-interface, Ethernet, VLAN, virtual Frame Relay,
	virtual PPP, and loopback interfaces.

5991-2114 © Copyright 2005 Hewlett-Packard Development Company, L.P. 677