3Com Switch 8800 Family Configuration Guide

Configuring Broadcast/Multicast Suppression 439
# Create a local-user in system view. Then set the password and service type for
the user.
[SW8800] local-user liu
[3Com-luser-liu] password simple aaa
[3Com-luser-liu] service-type lan-access
# In user view, configure the allowed multicast group for the user to join.
[3Com-luser-liu] multicast 227.1.1.1
Configuring
Broadcast/Multicast
Suppression
Introduction To prevent port congestion resulting from broadcast/multicast packet flooding, the
switch supports broadcast/multicast suppression. You can enable
broadcast/multicast suppression by setting the speed percentage or bandwidth
values.
Configuration
c
CAUTION:
■ You cannot enable both broadcast suppression and multicast suppression
simultaneously on the same card. Namely, once you have enabled broadcast
suppression on some ports of a card, you cannot enable multicast suppression
on the other ports of the card, and vice versa.
■ If multicast suppression is enabled, broadcast packets are also suppressed at
the same time, while broadcast suppression does not work on multicast
suppression.
■ No distinction is made between known multicast and unknown multicast for
multicast suppression.
Tab le 430 Configure Broadcast/Multicast Suppression
Operation Command Remarks
Enter system view system-view -
Enter Ethernet port view
interface interface-type
interface-number
Required
interface-type must be
Ethernet
Configure multicast
suppression ration Ethernet
port
multicast-suppression { ratio |
bandwidth bandwidth }
Optional
By default, the multicast
suppression ratio is 100%
Configure broadcast
suppression ration Ethernet
port
broadcast-suppression { ratio |
bandwidth bandwidth }
Optional
By default, the broadcast
suppression ratio is 50%