ADTRAN 5000 Series bridge-group <group#> spanning-disabled

Command Reference Guide PPP Interface Configuration Command Set

bridge-group <group#> spanning-disabled

Use the bridge-group spanning-disabled command to transparently bridge two interfaces on a network

(that have no parallel or red undant paths) without the overhead of spanning-tree protocol calculations. To

enable the spanning-tree protocol on an interface, use the no form of this command.

Syntax Description

<group#> Assigns a bridge group number (range: 1 to 255).

Default Values

By default, spanning-t re e protocol is enab l ed on all cre a ted brid g e gr ou ps.

Applicable Platforms

This command applies to the NetVanta 5000 Series units.

Command History

Release 1.1 Command was introduced.

Functional Notes

When no parallel (redundant) paths exist within a bridged network, disabling the spanning tree protoco l

reduces traf fic on the bridge d interface. This traf fic reduction can be help ful when bridging over a WAN link.

Usage Examples

The following example disables the spanning-tree protocol for bridge group 17 on the PPP interface

labeled 1:

(config)#interface ppp 1

(config-ppp 1)#bridge-group 17 spanning-disabled

Technology Review

S p anning-tree protocol provides a way to preven t loopback or p arallel pa ths in bridged networ ks. Using the

priority values and path costs assigned to each bridging interface, the spanning-tree protocol determines

the root path and identifies whether to block or allow other paths.

Before disabling the spanning-tree protocol on a bridged interface, verify that n o

redundant loops exist.