Stp Root Secondary - Huawei Quidway S2000 Series Command Manual

Command Manual - STP
Quidway S2000 Series Ethernet Switches
Caution:
In a switching network, you can configure no more than one primary root for a spanning tree but you can
configure one or more secondary roots for it. Remember not to designate more than one primary root in
a spanning tree; otherwise, the calculation result will be unpredictable.
After a switch is configured as primary root switch or secondary root switch, user can't modify the bridge
priority of the switch.
Example
# Designate the current switch as the primary root of a spanning tree.
[Quidway] stp root primary

1.1.14 stp root secondary

Syntax
stp root secondary
undo stp root
View
System view
Parameter
none
Description
Using stp root secondary command, you can configure the current switch as a
secondary root of a specified spanning tree. Using undo stp root secondary
command, you can cancel the designation of the current switch for a secondary root of
a specified spanning tree.
By default, a switch is not a secondary root.
You can designate one or more secondary root for a spanning tree. When the primary
root fails or is powered off, a secondary root can take its place. Of more than one
secondary roots, the one with the smallest MAC address will become the primary root
of the specified spanning tree.
You can configure no more than one primary root for a spanning tree but you can
configure one or more secondary roots for it. You cannot change the bridge priority of
a switch if you configure it as secondary root of a spanning tree.
Chapter 1 RSTP Configuration Commands
1-11