Configuring Broadcast/Multicast Suppression - 3Com 8807 Configuration Manual

Configuring
Broadcast/Multicast
Suppression
Introduction
Configuration
# 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
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.
Table 430 Configure Broadcast/Multicast Suppression
Operation
Enter system view
Enter Ethernet port view
Configure multicast
suppression ration Ethernet
port
Configure broadcast
suppression ration Ethernet
port
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.

Configuring Broadcast/Multicast Suppression

Command
system-view
interface interface-type
interface-number
multicast-suppression { ratio |
bandwidth bandwidth }
broadcast-suppression { ratio |
bandwidth bandwidth }
439
Remarks
-
Required
interface-type must be
Ethernet
Optional
By default, the multicast
suppression ratio is 100%
Optional
By default, the broadcast
suppression ratio is 50%