Spanning-Tree Vlan Root; Spanning-Tree Vlan Priority - Dell Networking 2024 Reference Manual

spanning-tree vlan root

Use the spanning-tree vlan root primary command to configure the switch to
become the root bridge or standby root bridge by modifying the bridge
priority from the default value to a lower value calculated to ensure the bridge
is the root (or standby) bridge. Use the no form of the command to let the
network elect the root bridge.
Syntax
vlan-list
spanning-tree vlan root {primary | secondary}
vlan-list
no spanning tree vlan root
Default Configuration
The default bridge priority value is 32768.
Command Modes
Global Configuration mode
User Guidelines
This command can be configured even if the switch is configured for MST
(RSTP) mode. It is only used when the switch is configured for PVST or
RPVST modes.
The logic sets the bridge priority to a value lower (primary) or next lower
(secondary) than the lowest bridge priority for the specified VLAN or a range
of VLANs. This command only applies when STP-PV or RSTP-PV is enabled.
Example
console(config)#spanning-tree vlan 3 root primary

spanning-tree vlan priority

Use the spanning-tree vlan priority command to configure the bridge priority
of a VLAN. The bridge priority is combined with the MAC address of the
switch and is used to select the root bridge for the VLAN. Use the no form of
the command to return the priority to the default value.
769
Spanning Tree Commands