Users Guide

IPv4 and IPv6 Multicast 1589
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.