Cisco ASR 9000 Series Reference Guide

external-cost (MSTP)
To set the external path cost on the current port, use the external-cost command in MSTP interface
configuration submode.
external-cost cost
Syntax Description
Port cost. Range is 1 to 200000000.
cost
Command Default
The default path cost depends on the speed of the link.
Command Modes
MSTP interface configuration
Command History
ModificationRelease
This command was introduced.Release 3.7.1
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, writeinterface
Examples
The following example shows how to set the external cost to 10000:
RP/0/RSP0/CPU0:router:router(config-mstp-if)# external-cost 10000
Related Commands
DescriptionCommand
Enables debugging for sent and received MSTP packets.debug spanning-tree mst packet, on page 479
Enables debugging protocol-state changes such as port role or
state changes, topology change notification.
debug spanning-tree mst protocol-state, on
page 481
Enters the MSTP interface configuration submode, and enables
STP for the specified port.
interface (MSTP), on page 525
Cisco ASR 9000 Series Aggregation Services Router VPN and Ethernet Services Command Reference, Release
6.1.x
499
Multiple Spanning Tree Protocol Commands
external-cost (MSTP)

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