Command Reference Guide

SROS Command Line Interface Reference Guide PPP Interface Configuration Command Set
5991-2114 © Copyright 2005 Hewlett-Packard Development Company, L.P. 751
ip igmp
Use the ip igmp command to configure multicasting-related functions for the interface.
Command Modes
(config-interface)# Interface Configuration Mode
Valid interfaces include: Ethernet, VLAN, virtual Frame Relay, virtual PPP, and
loopback interfaces.
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
<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: 60-300 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.