bridge-group path-cost


bridge-group path-costinterface

bridge-group bridge-group path-cost value
no bridge-group bridge-group path-cost value
 

Configures

Changes a bridge group's path cost for an interface

Default

Based on the interface's bandwidth setting

Description

This command changes the path cost for an interface, which is usually calculated as 10,000 ÷ bandwidth, where the bandwidth is the value set by the bandwidth command or the default bandwidth for the interface. The value can be from 1 to 65,535. The higher the value, the higher the cost.


bridge-group priorityinterface

bridge-group bridge-group priority value
no bridge-group bridge-group priority value
 

Configures

Assigns a priority to a bridge group

Default

32,768 for bridges using the IEEE protocol; 128 for bridges using the Digital spanning-tree protocol

Description

This command assigns a priority to an interface within the given bridge-group. value specifies the interface's priority; this must be between 0 and 65,535. A higher priority increases the chance that the interface will be selected as the root bridge.


bridge-group spanning-disabledinterface

bridge-group bridge-group spanning-disabled
no bridge-group bridge-group spanning-disabled
 

Configures

Use of the spanning-tree algorithm

Default

Enabled

Description

This command disables the spanning-tree algorithm for the given bridge-group. The spanning algorithm can be disabled safely for bridge groups that have no possible loop paths at layer 2.

Example

interface ethernet 1
  bridge-group 1
  bridge-group 1 spanning-disabled
 


bridge hello-timeglobal

bridge bridge-group hello-time seconds
no bridge bridge-group hello-time seconds
 

Configures

The interval between hello packets

Default

2 seconds

Description

This command sets the hello interval for the given bridge-group to seconds. The value of seconds can be from 1 to 10.


bridge irbglobal

bridge irb
no bridge irb
 

Configures

Integrated Routing and Bridging (IRB)

Default

Disabled

Description

Like CRB, IRB allows a router to both route and bridge a single protocol. However, unlike CRB, IRB allows the routed and bridged interfaces to communicate with each other. See also interface bvi.


bridge max-ageglobal

bridgebridge-group max-age seconds
no bridge bridge-group max-age seconds
 

Configures

The time to save Bridge Protocol Data Units (BPDUs)

Default

15 seconds

Description

This command sets the maximum time that the router will wait to hear from the root bridge for the given bridge-group. If the router does not hear from the root bridge within this interval, the spanning tree is recomputed. The value of seconds can be from 6 to 200. (Note: Catalysts use 6-40 seconds.)


bridge multicast-sourceglobal

bridge bridge-group multicast-source
no bridge bridge-group multicast-source
 

Configures

Bridging to support the forwarding of multicast packets

Default

Disabled

Description

This command permits the given bridge-group to forward multicast packets.


bridge priorityglobal

bridge bridge-group priority value
no bridge bridge-group priority value
 

Configures

The priority of an individual bridge

Default

32768 for bridges using the IEEE protocol; 128 for bridges using the Digital spanning-tree protocol

Description

This command assigns a priority to an individual bridge within the given bridge-group. value specifies the interface's priority; value must be between 0 and 65535. A higher priority increases the chance that an interface will be selected as the root bridge. To set an interface to a specific priority, use the bridge-group priority command.