H3C S3600 Series User Manual

Operation Manual – MSTP
H3C S3600 Series Ethernet Switches-Release 1510 Chapter 1
MSTP Configuration
1-11
Operation Command Description
Specify the current switch
as the root bridge of a
specified spanning tree
stp [ instance instance-id ] root
primary [ bridge-diameter
bridgenumber ] [ hello-time
centi-seconds ]
Required
II. Specify the current switch as the secondary root bridge of a specified
spanning tree
Table 1-5 Specify the current switch as the secondary root bridge of a specified
spanning tree
Operation Command Description
Enter system view
system-view
—
Specify the current switch
as the secondary root
bridge of a specified
spanning tree
stp [ instance instance-id ] root
secondary [ bridge-diameter
bridgenumber ] [ hello-time
centi-seconds ]
Required
Using the stp root primary/stp root secondary command, you can specify the current
switch as the root bridge or the secondary root bridge of the spanning tree instance
identified by the instance-id argument. If the value of the instance-id argument is set to
0, the stp root primary/stp root secondary command specify the current switch as
the root bridge or the secondary root bridge of the CIST.
A switch can play different roles in different spanning tree instances. That is, it can be
the root bridges in a spanning tree instance and be a secondary root bridge in another
spanning tree instance at the same time. But in the same spanning tree instance, a
switch cannot be the root bridge and the secondary root bridge simultaneously.
When the root bridge fails or is turned off, the secondary root bridge becomes the root
bridge if no new root bridge is configured. If you configure multiple secondary root
bridges for a spanning tree instance, the one with the smallest MAC address replaces
the root bridge when the latter fails.
You can specify the network diameter and the hello time parameters while configuring a
root bridge/secondary root bridge. Refer to section
1.2.8 “Configuring the Network
Diameter of the Switched Network
” and 1.2.9 “Configuring the MSTP Time-related
Parameters
” for information about the network diameter parameter and the hello time
parameter.

H3C S3600 Series Specifications

General

Brand	H3C
Model	S3600 Series
Category	Switch
Language	English