Cisco NM-16ESW - EtherSwitch Switch Manual de usuario descargar pdf (Pagina 55)

Configuring the Cisco Gigabit EtherSwitch EHWIC

How to Configure Gigabit EtherSwitch EHWICs

Configuring the Cisco Gigabit EtherSwitch EHWIC

OL-23155-01

Preventing the Forwarding of Dynamically Learned Stations

By default, the switch forwards any frames for stations that it has dynamically learned. By disabling this

activity, the switch only forwards frames whose addresses have been statically configured into the

forwarding cache.

Beginning in privileged EXEC mode, follow these steps to prevent the switch from forwarding frames

for stations that it has dynamically learned.

SUMMARY STEPS

1. configure terminal

2. no bridge bridge-group acquire

3. end

DETAILED STEPS

To cause the switch to forward frames to stations that it has dynamically learned, use the bridge

bridge-group acquire command in global configuration mode.

Command Purpose

Step 1

configure terminal

Example:

Router#configure terminal

Enters global configuration mode.

Step 2

no bridge bridge-group acquire

Example:

Router(config)#no bridge 1 acquire

Enables the switch to stop forwarding any frames for stations that it has

dynamically learned through the discovery process and to limit frame

forwarding to statically configured stations.

The switch filters all frames except those whose destined-to addresses

have been statically configured into the forwarding cache. To configure

a static address, use the bridge bridge-group address mac-address

{forward | discard} command in global configuration mode.

For bridge-group, specify the bridge group number. The range is 1

to 255.

Step 3

end

Example:

Router(config)#end

Returns to privileged EXEC mode.

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Cisco NM-16ESW - EtherSwitch Switch Manual de usuario Pagina 55