Black Box computer hardware LEH1104A-4MMST Manual

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Black Box computer hardware LEH1104A-4MMST
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Page 145
Chapter 7: Command-Line Management
switch_a(config-if)#
2. Usage:
Use this command to set the port priority for a bridge group. The Multiple Spanning Tree Protocol uses port priority as a tiebreak-
er to determine which port should forward frames for a particular instance on a LAN, or which port should be the root port for
an instance. A lower value implies a better priority. In the case of the same priority, the interface index will serve as the tiebreaker,
with the lower-numbered interface being preferred over others. The permitted range is 0-240. The priority values can only be set
in increments of 16.
3. Command Syntax:
bridge GROUP instance INSTANCE_ID priority PRIORITY
GROUP <1-1> Specify the bridge-group ID.
INSTANCE_ID <1-15> Specify the instance ID.
PRIORITY <0-240> Specify the port priority in a range of <0-240>.
4. Example:
The following example sets the port priority (121) for Multiple Spanning Tree instance (3) to a port (fe1) in bridge GROUP (1):
switch_a(config)#interface fe1
switch_a(config-if)#bridge-group 1 instance 3 priority 121
switch_a(config-if)#
Bridge-Group Instance Path-Cost:
1. Command Mode: Interface mode
Logon to Configure Mode (Configure Terminal Mode).
Then logon to Interface mode.
fe1 means port 1.
The switch_a(config-if)# prompt will show on the screen.
switch_a(config)#interface fe1
switch_a(config-if)#
2. Usage:
Use this command to set the cost of a path associated with an interface. Use the no parameter with this command to restore the
default cost value of the path. A lower path-cost indicates a greater likelihood of the specific interface becoming a root.
3. Command Syntax:
bridge GROUP instance INSTANCE_ID path-cost PATH_COST
GROUP <1-1> Specify the bridge-group ID.
INSTANCE_ID <1-15> Specify the instance ID.
PATH_COST <1-200000000> Specify the cost of path in the range of <1-200000000>.
4. Example:
The following example sets the path cost (1000) for Multiple Spanning Tree instance (3) to a port (fe1) in bridge GROUP (1):
switch_a(config)#interface fe1
switch_a(config-if)#bridge-group 1 instance 3 path-cost 1000
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