Specifications

mpls ldp loop-detection
MP-240
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
mpls ldp loop-detection
To enable the label distribution protocol (LDP) optional loop detection mechanism, use the mpls ldp
loop-detection command in global configuration mode. To disable this feature, use the no form of this
command.
mpls ldp loop-detection
no mpls ldp loop-detection
Syntax Description This command has no optional keywords or arguments.
Defaults LDP loop detection is disabled.
Command Modes Global configuration
Command History
Usage Guidelines The LDP loop detection mechanism is intended for use in networks of devices that do not use
t
ime-to-live mechanisms (for example, ATM switches) that cannot fairly allocate device resources
among traffic flows.
The LDP loop detection mechanism is used with the Downstream on Demand method of label
di
stribution, supplementing the Downstream on Demand hop count mechanism to detect looping LSPs
that might occur during routing transitions.
Examples The following command sets the LDP loop detection mechanism on:
Router(config)# mpls ldp loop-detection
Related Commands
Release Modification
12.0(10)ST This command was introduced.
12.1(2)T This command was integrated into Cisco IOS Release 12.1(2)T.
12.1(8a)E This command was integrated into Cisco IOS Release 12.1(8a)E.
12.0(22)S This command was integrated into Cisco IOS Release 12.0(22)S.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX This command is supported in the Cisco IOS Release 12.2SX train. Support
i
n a specific 12.2SX release of this train depends on your feature set,
platform, and platform hardware.
Command Description
mpls ldp maxhops Limits the number of hops permitted in an LSP established by the
D
ownstream on Demand method of label distribution.