Configuring, Modifying, and Monitoring the Unit
36
Viewing Bridge Parameters
get-st-bcfg
For determining Root in a spanning tree network, the MAC address is a tie breaker when priority
values for devices are equal. In this case, the unit with the lowest MAC address becomes the root.
For NH 2025-10 products, the lowest numbered switch has the lowest MAC address.
Example
SYS_console>get-st-bcfg
802.1D SPANNING TREE BRIDGE INFO
==================================
Designated Root : 0100-0800-870e-0742
Bridge Priority : 32768 ( 0x00008000 )
Root Cost : 10
Root Port : 1.02
Max Age : 20
Hello Time : 2
Hold Time : 1
Forward Delay : 15
Bridge Max Age : 20
Bridge Hello Time : 2
Bridge Forward Delay : 15
------ The time units are seconds
SYS_console>
Configuring the Bridge
Modifying the designated root: set-br-prio
By modifying the bridge priority you are able to choose which component becomes the Root
Bridge in your network. Decrease the priority to a value below the lowest priority you can see in
the other switches if you want this bridge to be the Root Bridge.
set-br-prio <priority>
The priority value is an integer in the range 0..65535. The default value is 32768.
Example
SYS_telnet>set-br-prio 32768
The Bridge Priority was changed
SYS_console>
Max Age: set-br-maxage
The set-br-maxage command sets amount of time between Spanning Tree configuration
messages.
set-br-maxage <maxage>
The maxage value is displayed in seconds with the range of 6..40. The default value is 20.