stp root secondary
Use stp root secondary to configure the device as a secondary root bridge.
Use undo stp root to restore the default.
Syntax
stp [ instance instance-list | vlan vlan-id-list ] root secondary
undo stp [ instance instance-list | vlan vlan-id-list ] root
Default
The device is not a secondary root bridge.
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
instance instance-list: Specifies a space-separated list of up to 10 MSTI items. Each item specifies an MSTI or a range of MSTIs in the form of instance-id1 [ to instance-id2 ]. The value for instance-id2 must be equal to or greater than the value for instance-id1. The value range for the instance-id argument is 0 to 4094, and the value 0 represents the CIST.
vlan vlan-id-list: Specifies a space-separated list of up to 10 VLAN items. Each item specifies a VLAN or a range of VLANs in the form of vlan-id1 [ to vlan-id2 ]. The value for vlan-id2 must be equal to or greater than the value for vlan-id1. The value range for the vlan-id argument is 1 to 4094.
Usage guidelines
Once you specify the device as a secondary root bridge, you cannot change the priority of the device.
If you do not specify an MSTI or VLAN, this command configures a secondary root bridge for the MSTP CIST or the STP or RSTP spanning tree.
Examples
# In MSTP mode, specify the device as a secondary root bridge in MSTI 1.
<Sysname> system-view [Sysname] stp instance 1 root secondary
# In PVST mode, specify the device as a secondary root bridge in VLAN 1.
<Sysname> system-view [Sysname] stp vlan 1 root secondary
Related commands
stp priority
stp root primary