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14-8 E
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OUTING
Table 14-2: IGMP Configuration Commands
Command Description
config igmp <query_interval>
<query_response_interval>
<last_member_query_interval>
Configures the IGMP timers. Timers are based
on RFC2236. Specify the following:
■
query_interval — The amount of time, in
seconds, the system waits between sending
out General Queries. The range is 1 to
2,147,483,647 seconds (68 years). The
default setting is 125 seconds.
■
query_response_interval — The
maximum response time inserted into the
periodic General Queries. The range is 1 to
25 seconds. The default setting is 10 seconds.
■
last_member_query_interval — The
maximum response time inserted into a
Group-Specific Query sent in response to a
Leave group message. The range is 1 to 25
seconds. The default setting is 1 second.
config igmp snooping <router_timeout>
<host_timeout>
Configures the IGMP snooping timers. Timers
should be set to approximately 2.5 times the
router query interval in use on the network.
Specify the following:
■
router_timeout — The interval, in
seconds, between the last time the router was
discovered and the current time. The range is
10 to 2,147,483,647 seconds (68 years). The
default setting is 260 seconds.
■
host_timeout — The interval, in seconds,
between the last IGMP group report message
from the host and the current time. The range
is 10 to 2,147,483,647 seconds (68 years).
The default setting is 260 seconds.
enable igmp {vlan <name>} Enables IGMP on a router interface. If no VLAN
is specified, IGMP is enabled on all router
interfaces. The default setting is enabled.
enable igmp snooping
{forward-mcrouter-only}
Enables IGMP snooping on the switch. If
forward-mcrouter-only is specified, the
switch forwards all multicast traffic to the
multicast router, only. Otherwise, the switch
forwards all multicast traffic to any IP router.