Administering STP Bridge Port Parameters

11-9

The following example shows values being set for more than one port:

Ethernet port 4 - Enter new value (disabled,enabled) [enabled]: disabled

Ethernet port 5 - Enter new value (disabled,enabled) [enabled]: disabled

Setting the Port You can set the path cost for a bridge port. The path cost is the cost to be Path Cost added to the root cost field in a configuration message received on this

port. This value is used to determine the path cost to the root through this port. You can set this value individually on each port.

Path cost value

Top-Level Menu

system

ethernet display summary

fddi ipFragmentation detail

bridge ipxSnapTranslation multicastLimit

ip

addressThreshold

stpState

snmp

agingTime

stpCost

analyzer stpState

script

stpPriority stpPriority

stpMaxAgeaddress

logout

stpHelloTime

 

 

stpForwardDelay

 

stpGroupAddress

port packetFilter

A larger path cost value makes the LAN reached through the port more likely to be low in the Spanning Tree topology. The lower the LAN is in the topology, the less through traffic it will carry. For this reason, you might want to assign a large path cost to a LAN with a lower bandwidth or one on which you want to minimize traffic.

To configure the path cost:

1From the top level of the Administration Console, enter:

bridge port stpCost

You are prompted for the port type.

2Enter Ethernet, FDDI, or all.

You are prompted for the port number(s).

3Enter the number(s) of the port(s) or all to configure path cost for all ports on each bridge.

You are prompted for the path cost for each port you specified.

4Enter the path cost for the port(s).

The following example shows values being set for more than one port:

FDDI port 1 - Enter new value [100]: 50

Ethernet port 3 - Enter new value [100]: 200

Ethernet port 4 - Enter new value [100]: 200

If your configuration was successful, you return to the previous menu. If the configuration was not successful, you are notified that your changes failed, and you can try to re-enter those changes.

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3Com 2200 manual Bridge port stpCost