Multicast claiming, Disabling flood limits, Multicast claiming -32 – Alcatel Carrier Internetworking Solutions Omni Switch/Router User Manual

Page 254: Disabling flood limits -32

Multicast Claiming

Page 9-32

Multicast Claiming

Multicast claiming can be enabled for networks with heavy multicast traffic. When enabled,
multicast claiming frees the

MPX

from processing multicast packets by off-loading this traffic

to the switching modules. When multicast claiming is enabled, the switch “claims” destination
multicast addresses and places them in the

CAM

s of all switching modules in the switch.

You can enable multicast claiming by adding the following line to the

mpx.cmd

file:

bslLearnMcPkt=1

You can use the

edit

command to make this change. (See Chapter 7, “Managing Files,” for

instructions on using the

edit

command.) You will need to reboot the switch for this parame-

ter to take effect. Multicast claiming can later be disabled by changing the setting for this
parameter to zero (0), as follows:

bslLearnMcPkt=0

An alternative method for managing multicast traffic is through the use of Multicast

VLANs

. See

Chapter 27, “Managing AutoTracker” and Chapter 28, “Managing Multicast

VLANs”

for further

information.

Disabling Flood Limits

Two

commands are available for controlling flood limits for individual ports and Groups.

The

modvp

command (described in Chapter 24, “Managing Groups and Ports”) allows you to

control the flood limits for a specific port. The

flc

command (described in Chapter 22,

“Configuring Bridging Parameters”) allows you to configure flood limits for all ports in a
group.

You can also disable flood limits on a switch-wide basis by adding the following line to the

mpx.cmd

file:

disableFloodLimiting=1

You can use the

edit

command to make this change. See Chapter 11, “Managing Files,” for

instructions on using the

edit

command. You will need to reboot the switch for this parame-

ter to take effect.