Cisco ASR 9000 Series Command Reference Guide

lacp fast-switchover
To disable the wait-while timer in the LACP state machine, use the lacp fast-switchover command in interface
configuration mode. To re-enable the wait-while timer, use the no form of this command.
lacp fast-switchover
no lacp fast-switchover
Syntax Description
This command has no keywords or arguments.
Command Default
The wait-while timer in the LACP state machine is enabled.
Command Modes
Interface configuration (config-if)
Command History
ModificationRelease
This command was introduced.Release 3.9.0
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.
If you have 1:1 link protection enabled (you set the value of the bundle maximum-active links command to
1) on a bundle with member links running LACP, you can optionally disable the wait-while timer in the LACP
state machine. Disabling this timer causes a bundle member link in standby mode to expedite its normal state
negotiations, thereby enabling a faster switchover from a failed active link to the standby link.
Regardless of the type of switchover you are using, the default IEEE standard-based or the faster proprietary
optimized switchover, the state negotiations of the standby link is expedited. (For more information about the
switchover types, refer to the bundle maximum-active links, on page 578 command.) However, enabling the
lacp fast-switchover command provides a greater benefit if used with the IEEE standard-based switchover.
Examples
The following example shows how to disable the wait-while timer for LACP-enabled member links of
Bundle-Ether 28:
RP/0/RSP0/CPU0:router(config)# interface Bundle-Ether 28
RP/0/RSP0/CPU0:router(config-if)# lacp fast-switchover
The following example shows how to re-enable the wait-while timer for LACP-enabled member links of
Bundle-Ether 28:
RP/0/RSP0/CPU0:router(config)# interface Bundle-Ether 28
RP/0/RSP0/CPU0:router(config-if)# no lacp fast-switchover
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Release 5.3.x
596
Link Bundling Commands on the Cisco ASR 9000 Series Router
lacp fast-switchover

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