stp root primary

Use stp root primary to configure the device as the root bridge.

Use undo stp root to restore the default.

Syntax

stp [ instance instance-list | vlan vlan-id-list ] root primary

undo stp [ instance instance-list | vlan vlan-id-list ] root

Default

A device is not a root bridge.

Views

System view

Predefined user roles

network-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 the root bridge, you cannot change the priority of the device.

If you do not specify an MSTI or VLAN, this command configures the device as the root bridge of the MSTP CIST or of the STP or RSTP spanning tree.

Examples

# In MSTP mode, specify the device as the root bridge of MSTI 1.

<Sysname> system-view
[Sysname] stp instance 1 root primary

# In PVST mode, specify the device as the root bridge of VLAN 1.

<Sysname> system-view
[Sysname] stp vlan 1 root primary

Related commands

stp priority

stp root secondary