Global Broadcast Suppression Feature; Configuring Global Broadcast Suppression; Global Broadcast Suppression Configuration Example; Configuration Procedure - 3Com 5500-SI Configuration Manual

76 C 3: P O
HAPTER ORT PERATION
Global Broadcast
Suppression Feature
Configuring Global
Broadcast Suppression
Global Broadcast
Suppression
Configuration Example

Configuration procedure

Only when the three ports are configured with identical basic configuration, rate and
duplex mode, can they be added into a same dynamic aggregation group after LACP
is enabled on them, for load sharing.
This section describes how to configure the Global Broadcast Suppression feature.
You can use the following command to globally configure the size of the broadcast
traffic allowed to pass through each Ethernet port. Once the broadcast traffic exceeds
the threshold you configured, the system discards some broadcast packets to
decrease the ratio of the broadcast traffic into a reasonable range. This suppresses
broadcast storms and avoids network congestion to guarantee the normal operation
of network services.
Table 58 Configure global broadcast suppression
Operation
Enter system view
Globally configure the size of
broadcast traffic allowed to
pass through each Ethernet
port
The broadcast suppression configured globally with the broadcast-suppression
command will take effect on all the Ethernet ports in a stack system.
Network requirements
Configure the global broadcast suppression ratio to 20. That is, allow 20% network
bandwidth to be occupied by broadcast traffic.
1 Enter system view.
<S5500> system-view
2 Configure the ratio of global broadcast suppression to 20.
[S5500] broadcast-suppression 20
3 Display the configuration result.
[S5500] display current-configuration
......
#
interface Ethernet1/0/1
broadcast-suppression 20
#
interface Ethernet1/0/2
broadcast-suppression 20
#
interface Ethernet1/0/3
broadcast-suppression 20
#
Command Description
system-view -
broadcast-suppression By default, the system allows the
{ ratio | pps max-pps } broadcast traffic to occupy 100%
network bandwidth. That is, it does
not limit broadcast traffic.