Cisco ASR 9000 Series Reference Guide

root-priority
To set the root bridge priority sent in BPDUs for this interface for this MSTI or VLAN, and to set an optional
startup value, use the root-priority command in the MSTAG instance configuration, REPAG instance
configuration, PVSTAG VLAN configuration and PVRSTAG VLAN configuration modes.
root-priority priority [startup-value startup-priority]
Syntax Description
Sets the root bridge priority to set in the BPDUs. For MSTAG, REPAG and
PVRSTAG, the range is between 0 to 61440 in multiples of 4096. For PVSTAG,
the range is between 0 to 65535.
priority
Specifies an alternate value to use when the interface first comes up, while the
preempt delay timer is running.
startup-value
Sets the startup root priority.
startup-priority
Command Default
Default value is 32768. If the startup value is not specified while the standard value is, the startup value
defaults to the standard value.
For MSTAG and REPAG, the default is 32768. For PVSTAG and PVRSTAG, the default is 0.
Command Modes
MSTAG instance configuration, REPAG instance configuration, PVSTAG VLAN configuration, PVRSTAG
VLAN configuration
Command History
ModificationRelease
This command was introduced.Release 3.7.1
This command was supported in the PVSTAG VLAN and PVRSTAG
VLAN configuration modes.
Release 4.0.0
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
Task ID
OperationsTask ID
read, writeethernet-services (PVSTAG and PVRSTAG only)
read, writeinterface (MSTAG and REPAG only)
Cisco ASR 9000 Series Aggregation Services Router VPN and Ethernet Services Command Reference, Release
6.1.x
577
Multiple Spanning Tree Protocol Commands
root-priority

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model