Enterasys Networks D-Series - Manual (Page 240)

set spantree backuproot
8-22 Spanning Tree Configuration
set spantree backuproot
Use this command to enable or disable the Spanning Tree backup root function on the switch.
Syntax
set spantree backuproot sid {disable | enable}
Parameters
Defaults
None.
Mode
Switch command, read‐write.
Usage
The Spanning Tree backup root function is disabled by default on the D‐Series. When this feature
is enabled and the switch is directly connected to the root bridge, stale Spanning Tree information
is prevented from circulating if the root bridge is lost. If the root bridge is lost, the backup root will
dynamically lower its bridge priority so that it will be selected as the new root over the lost root
bridge.
Example
This example shows how to enable the backup root function on SID 2:
D2(rw)->set spantree backuproot 2 enable
clear spantree backuproot
Use this command to reset the Spanning Tree backup root function to the default state of disabled.
Syntax
clear spantree backuproot sid
Parameters
Defaults
None.
Mode
Switch command, read‐write.
sid Specifies the Spanning Tree instance on which to enable or disable the
backup root function.Valid values are 0 ‐ 4094.
disable | enable Enables or disables the backup root function.
sid Specifies the Spanning Tree on which to clear the backup root
function.Valid values are 0 ‐ 4094.