Configuration Guide User guide

FastIron Configuration Guide 1473
53-1002494-02
IGMP snooping configuration
The original command, ip igmp-report-control, has been renamed to ip multicast report-control. The
original command is still accepted; however, it is renamed when you issue a show configuration
command.
Modifying the wait time before stopping traffic when
receiving a leave message
You can define the wait time before stopping traffic to a port when a leave message is received.
The device sends group-specific queries once per second to ask if any client in the same port still
needs this group. Due to internal timer granularity, the actual wait time is between n and (n+1)
seconds (n is the configured value).
Brocade(config)# ip multicast leave-wait-time 1
Syntax: [no] ip multicast leave-wait-time <num>
<num> is the number of seconds from 1 through 5. The default is 2 seconds.
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.
Brocade(config)# ip multicast mcache-age 180
Syntax: [no] ip multicast mcache-age <num>
<num> is the number of seconds from 60 through 3600. The default is 60 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 the following command.
Brocade(config)# ip multicast verbose-off
Syntax: [no] ip multicast verbose-off
Configuring static router ports
The Brocade 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 the following
commands.
Brocade(config)#vlan 70
Brocade(config-vlan-70)# multicast router-port ethernet 4 to 5 ethernet 8
Syntax: [no] multicast router-port ethernet <port> [ethernet <port> | to <port>]