3Com 4500 PWR 26-PORT, 4500 PWR 50-PORT, 4500 50-PORT, 4500 26-PORT Multicast-suppression Syntax

Ethernet Port Configuration Commands 55

Description

■Use the mdi command to configure the network cable type for an Ethernet port.

■Use the undo mdi command to restore the default type. By default, the network cable type is recognized automatically (the mdi auto command).

Note that this command only has effect on 10/100BASE-T and 10/100/1000BASE-T ports. The Switch 4500 only supports auto (auto-sensing). If you enter another type, an error message displays.

Example

To configure the network cable type of port “Ethernet1/0/1” as cross-over cable, enter the following:

<4500>system-view

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

[4500]interface ethernet 1/0/1

[4500-Ethernet1/0/1]mdi across

[4500-Ethernet1/0/1]

multicast-suppression Syntax

multicast-suppression { ratio pps pps}

undo multicast-suppression

View

Ethernet Port View

Parameter

ratio: Specifies the bandwidth ratio of multicast traffic allowed on an Ethernet port. The ratio value ranges from 1 to 100. The incremental step is 1. By default, the ratio is 100 meaning all multicast traffic is accepted. The smaller the ratio is, the less bandwidth is allocated to multicast traffic and therefore less broadcast traffic is accepted on the Ethernet port.

pps pps: Specifies the maximum number of multicast packets per second accepted on an Ethernet port. Ranges from 1 to 148810 pps.

Description

Use multicast-suppressionto configure the amount of multicast traffic that will be accepted on a port. Once the multicast traffic exceeds the value set by the user, the excess multicast traffic will be discarded. This feature can be used to ensure network service and prevent multicast storms.

Example

Enable a limit of 20% of the available bandwidth on a port to be allocated to multicast traffic. Multicast traffic exceeding 20% of the ports bandwidth will be discarded.

<4500>system-view

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

[4500]interface ethernet 1/0/1