Specifications

tunnel mpls traffic-eng fast-reroute
MP-869
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
tunnel mpls traffic-eng fast-reroute
To enable a Multiprotocol Label Switching (MPLS) traffic engineering (TE) tunnel to use an established
backup tunnel in the event of a link or node failure, use the tunnel mpls traffic-eng fast-reroute
command in interface configuration mode. To disable this capability, use the no form of this command.
tunnel mpls traffic-eng fast-reroute [b
w-protect] [node-protection]
no tunnel mpls traffic-eng fast-reroute
Syntax Description
Command Default There is no backup bandwidth protection.
Command Modes Interface configuration
Command History
Usage Guidelines If you specify the bw
-protect keyword, all path messages for the tunnel’s label-switched path (LSP) are
sent with the bandwidth protection bit set.
After you enter the command, with or without the b
w-protect keyword, the requested action or change
propagates along all hops of the LSP. Midpoint routers that are point of local repairs (PLRs) for the LSP
take the appropriate action based on whether the bit was just set or cleared. If the bit was just set or
cleared, a new backup tunnel selection happens for the LSP because the LSP now has a higher or lower
priority in the backup tunnel selection process.
To unconfigure only backup bandwidth protection, enter the t
unnel mpls traffic-eng fast-reroute
command.
To disable an MPLS TE tunnel from using an established backup tunnel in the event of a link or node
f
ailure, enter the no form of the command.
bw-protect (Optional) Sets the “bandwidth protection desired” bit so that backup
ban
dwidth protection is enabled.
node-protection (Optional) Sets the “node protection desired” bit so that backup bandwidth
p
rotection is enabled.
Release Modification
12.0(08)ST This command was introduced.
12.2(18)S This command was integrated into Cisco IOS Release 12.2(18)S.
12.2(18)SXD This command was implemented on the Cisco Catalyst 6000 series with the
S
UP720 processor.
12.0(29)S The b
w-protect keyword was added.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.4(20)T This command was integrated into Cisco IOS Release 12.4(20)T.