3Com 3CB9LF36RL, 3CB9LF36TL, 3CB9LG9MC, 3CB9LF20MM, 3CB9LF20R, 3CB9LF10MC manual Multicastlimit

24CHAPTER 2: RELEASE HIGHLIGHTS

Example:

CB9000@slot 5.1 [36L-E/FEN-TX-L2] (bridge): multicast

Menu options (CoreBuilder 9000-10AD6C):

igmp - Administer IGMP snooping

multicastLimit - Set the multicast packet rate limit broadcastLimit - Set the broadcast packet rate limit floodLimit - Set the flood packet rate limit CB9000@slot 5.1 [36L-E/FEN-TX-L2] (bridge/multicast):

multicastlimit

Enter new value (0-16777216) [50000]: 100000

This example limits the total multicast traffic leaving participating front-panel ports to 100,000 fps.

3Activate (or deactivate) multicast limiting.

■To activate multicast rate limiting (to turn limiting on), enter

McastBcast

■To deactivate multicast rate limiting (to turn limiting off), enter

BcastOnly

4From the bridge port menu, enter the particular packet type, to configure each port to participate in either broadcast or flood module rate limiting (in addition to multicast rate limiting, which you configured in Step 3).

■To activate broadcast or flood-rate limiting (to turn limiting on), enter enabled

■To deactivate broadcast or flood-rate limiting (to turn limiting off), enter disabled

Example (broadcast rate limiting):

CB9000@slot 5.1 [36L-E/FEN-TX-L2] (bridge/port):

broadcastLimitMode

Select bridge ports (1-36all?) [1]: 1

Enter new value (disabled,enabled) [disabled]:

If you select disabled for a port, the port does not participate in the module broadcast rate limiting.

The following example illustrates what happens when, for example, you specify an egress threshold of 3,000 fps for the module’s multicast rate limit. Ports 3 and 10 are configured to participate in module multicast rate limiting.