Users Guide

Table Of Contents
1668 IPv4 and IPv6 Multicast
Configuring and Viewing IGMP
Use the following commands to configure IGMP on the switch and on VLAN
routing interfaces and to view IGMP information.
Command Purpose
configure Enter global configuration mode.
ip multicast-routing Enable IPv4/IPv6 multicast routing.
ip pim sparse-mode Enable PIM/IGMP on the switch. IGMP is implicitly
enabled with PIM.
interface vlan
vlan-id
Enter Interface Configuration mode for the specified
VLAN.
ip igmp version
version
Set the version of IGMP for an interface.
The
version
variable can be 1, 2, or 3.
ip igmp robustness
robustness
Configure the robustness that allows tuning of the
interface, that is, tuning for the expected packet loss on a
subnet. If a subnet is expected to have significant loss, the
robustness variable may be increased for the interface.
The range for
robustness
is 1–255.
ip igmp query-interval
seconds
Configure the query interval for the specified interface.
The query interval determines how fast IGMP Host-
Query packets are transmitted on this interface.
The range for
seconds
is 0–3600 seconds.
ip igmp query-max-
response-time
seconds
Configure the maximum response time interval for the
specified interface. It is the maximum query response
time advertised in IGMPv2 queries on this interface.
The range for
seconds
is 0–25 seconds.
ip igmp startup-query-
interval
seconds
Set the interval between general queries sent at startup on
the interface.
The range for
seconds
is 0–300 seconds.
ip igmp startup-query-
count
count
Set the number of queries sent out on startup —at
intervals equal to the startup query interval for the
interface.
The range for
count
is 1–20.