Brocade TurboIron 24X Series Configuration Guide - Manual (Page 813)

Brocade TurboIron 24X Series Configuration Guide 779
53-1003053-01
Configuring IGMP snooping
Modifying the multicast cache age time
You can set the time for an mcache to age out when it does not receive traffic. The traffic is
hardware switched. One minute before aging out an mcache, the device mirrors a packet of this
mcache to CPU to reset the age. If no data traffic arrives within one minute, this mcache is deleted.
A lower value quickly removes resources consumed by idle streams, but it mirrors packets to CPU
often. A higher value is recommended only data streams are continually arriving.
TurboIron(config)#ip multicast mcache-age 180
Syntax: [no] ip multicast mcache-age <num>
<num> is the number of seconds from 60 to 3600. The default is 120 seconds.
Enabling or disabling error and warning messages
The device prints error or warning messages when it runs out of software resources or when it
receives packets with the wrong checksum or groups. These messages are rate-limited. You can
turn off these messages by entering a command such as the following.
TurboIron(config)#ip multicast verbose-off
Syntax: [no] ip multicast verbose-off
Configuring static router ports
The device forwards all multicast control and data packets to router ports which receive queries.
Although router ports are learned, you can force multicast traffic to specified ports even though
these ports never receive queries. To configure static router ports, enter commands such as the
following.
TurboIron(config)#vlan 70
TurboIron(config-vlan-70)#multicast router-port e 4 to 5
Syntax: [no] multicast router-port <port-numbers>
Turning off static group proxy
If a device has been configured for static groups, it acts as a proxy and sends membership reports
for the static groups when it receives general or group-specific queries. When a static group
configuration is removed, it is deleted from the active group table immediately. However, leave
messages are not sent to the querier, and the querier should age out the group. Proxy activity can
be turned off. The default is on. To turn proxy activity off for VLAN 20, enter commands similar to
the following.
TurboIron(config)#vlan 20
TurboIron(config-vlan-20)#multicast proxy-off
Syntax: [no] multicast proxy-off