Cisco NM-8B-U - HW ROUTERS L-M User Manual page 122

Configuration Tasks
The protected port feature is not compatible with fallback bridging. When fallback bridging is
Note
enabled, it is possible for packets to be forwarded from one protected port on a switch to another
protected port on the same switch if the ports are in different VLANs.
Beginning in privileged EXEC mode, follow these steps to create a bridge group and assign an interface
to it:
Command
Step 1 configure terminal
Step 2 bridge bridge-group protocol
vlan-bridge
Step 3 interface interface-id
Step 4 bridge-group bridge-group
Step 5 end
Step 6
show running-config
Step 7
copy running-config startup-config
To remove a bridge group, use the no bridge bridge-group protocol vlan-bridge global configuration
command. To remove an interface from a bridge group, use the no bridge-group bridge-group interface
configuration command.
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.
Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ
122
16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series
Purpose
Enters global configuration mode.
Assigns a bridge group number, and specify the VLAN-bridge
spanning-tree protocol to run in the bridge group. The ibm and dec
keywords are not supported.
For bridge-group, specify the bridge group number. The range is 1
to 255. You can create up to 31 bridge groups.
Frames are bridged only among interfaces in the same group.
Enters interface configuration mode, and specify the interface on which
you want to assign the bridge group.
The specified interface must be one of these:
A routed port: a physical port that you have configured as a Layer 3
•
port by entering the no switchport interface configuration
command.
An SVI: a VLAN interface that you created by using the interface
•
vlan vlan-id global configuration command.
These ports must have IP addresses assigned to them.
Assigns the interface to the bridge group created in Step 2.
By default, the interface is not assigned to any bridge group. An
interface can be assigned to only one bridge group.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.