3Com 7750 Series Chapter 1 VLAN Configuration Commands

3Com Switch 7750 Series

Command Reference Guide – VLAN Commands Chapter 1 VLAN Configuration Commands

1-1

Chapter 1 VLAN Configuration Commands

Syntax

broadcast-suppression { ratio | pps pps }

undo broadcast-suppression

View

VLAN view

Parameter

ratio: Specifies the bandwidth ratio for the maximum broadcast traffic in specific VLAN.

Its value ranges from 1 to 100 and defaults to 100. The smaller the ratio is, the less the

allowed broadcast traffic can pass.

pps pps: Specifies the maximum number of broadcast packets that can pass through a

specific VLAN per second. Its value ranges from 1 to 148800.

Description

Use the broadcast-suppression command to suppress broadcast traffic through a

VLAN. hUse the undo broadcast-suppression command to reset the allowed

broadcast traffic through a VLAN to the default value.

By default, the switch does not suppress broadcast traffic.

When the actual broadcast traffic exceeds the specified value, the system will discard

the extra packets so that the bandwidth occupied by broadcast traffic can be kept within

a specific ratio to ensure normal network operation.

A VLAN only supports one broadcast storm suppression mode at one time. If you

configure broadcast storm suppression modes multiple times for a VLAN, the latest

configuration will overwrite the previous configuration.

Example

# Allow broadcast traffic to occupy 20% bandwidth in VLAN2.

<3Com> system-view

System View: return to User View with Ctrl+Z.

[3Com] vlan 2

[3Com-vlan2] broadcast-suppression 20