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