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label-switched-path (Protocols MPLS)


Hierarchy Level


Configure an LSP to use in dynamic MPLS. When configuring an LSP, you must specify the address of the egress router in the to statement. All remaining statements are optional.



Name that identifies the LSP. The name can be up to 64 characters and can contain letters, digits, periods, and hyphens. To include other characters, enclose the name in quotation marks. The name must be unique within the ingress router.


Enable path computation across credibility levels. The constraint path computation is run across multi-protocol links and nodes, instead of a credibility-by-credibility basis.


Enable protection for LSP from link faults only.


Disable self-ping for the LSP.


Starting in Junos OS 17.4, you can override the behavior of self-ping running by default using no-self-ping statement.


Starting with Junos OS 16.1 the MPLS EXP bits transmitted in self ping messages are set based on the DSCP/ToS setting of the corresponding IP packet. In prior Junos OS releases the MPLS EXP bits in self ping packets are set to 0.

self-ping-duration seconds

Specify the duration (in seconds) for which to run the self-ping mechanism unless the ping succeeds sooner.

LSP self-ping for an LSP starts at the ingress label edge router (LER), once a Resv message for that LSP has been received. The configured self-ping time indicates the duration for which the self-ping mechanism runs once the LSP instance is signaled to be UP.

By default, self-ping is enabled. The LSP types like CCC, P2MP, VLAN-based , and non-default instances do not support self-ping .

The self-ping mechanism runs until the self-ping probe is received back (at which point the traffic is immediately switched to it) , or until the configured self-ping duration for the LSP is over (at which point traffic is switched over).

When self-ping is enabled and when LSP signaling succeeds, LSP will not come up immediately. The LSP comes up only after the self-ping succeeds or times out.

When LSP self-ping-duration is enabled, the LSP behavior reverts back to a timer-based mechanism similar to the optimize-switchover-delay, where a specific amount of time is provided for all the downstream nodes to install the forwarding path before switchover. When LSP self-ping-duration is not enabled, the default behavior is to wait for 1800 seconds for the self-ping to succeed before switching the traffic.

  • Range: 1 through 65535 seconds


    Starting in Junos OS 17.4R1, the default time-out duration for which the self-ping runs on an LSP instance is reduced from 65535 (runs until success) to 1800 seconds. You can also configure the self ping duration value between 1 to 65535 (runs until success) seconds.

The remaining statements are explained separately. See CLI Explorer.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced before Junos OS Release 7.4.

cross-credibility-cspf option introduced in Junos OS Release 14.2.

self-ping-duration and no-self-ping options introduced in Junos OS Release 16.1.