Specifications

mpls traffic-eng backup-path
MP-312
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
mpls traffic-eng backup-path
To assign one or more backup tunnels to a protected interface, use the mpls traffic-eng backup-path
command in interface configuration mode.
mpls traffic-eng backup-path tunnelt
unnel-id
Syntax Description
Command Default No backup tunnels are used if this interface goes down.
Command Modes Interface configuration
Command History
Usage Guidelines Enter this command on the interface to be protected (Link Protection), or on the interface whose
d
ownstream node is being protected (Node Protection). You can enter this command multiple times to
select multiple backup tunnels for a given protected interface. An unlimited number of backup tunnels
can be assigned to protect an interface. The only limitation is memory. By entering this command on a
physical interface, LSPs using this interface (sending data out of this interface) can use the indicated
backup tunnels if there is a link or node failure.
Examples The following example assigns backup tunnel 34 to interface POS5/0:
Router(config)# interface pos5/0
Router(config-if)# mpls traffic-eng backup-path tunnel34
tunneltunnel-id Tunnel ID of the backup tunnel that can be used in case of a failure.
Release Modification
12.0(10)ST This command was introduced.
12.0(16)ST With Link Protection, this command selected the one-and-only backup
t
unnel for a given protected interface. If you enter the command twice, the
second occurrence overwrites the first occurrence.
12.0(22)S You can now enter this command multiple times to select multiple backup
t
unnels for a given protected interface. This can be done for both Link and
Node Protection. The command is supported on the Cisco 10000 series
ESRs.
12.2(18)SXD1 This command was integrated into Cisco IOS Release 12.2(18)SXD1.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(31)SB2 This command was integrated into Cisco IOS Release 12.2(31)SB2.