Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


show mpls lsp abstract-computation



Display the ingress to egress abstract hop computation used by the constrained shortest path in the preprocessing for LSPs. The command output displays the various computation passes involved per LSP, and the qualifying exit devices for each pass. It also displays the affinity per pass, and the current start device chosen for the pass.


brief | detail | extensive

(Optional) Display the desired level of output.

logical-system (all | logical-system-name)

(Optional) Display the abstract computation for abstract hop constraints on all logical systems or on a particular logical system.


(Optional) Name of the LSP for which the abstract hop computation is displayed.

Required Privilege Level


Output Fields

Table 1 describes the output fields for the show mpls lsp abstract-computation command. Output fields are listed in the approximate order in which they appear.

Table 1: show mpls lsp abstract-computation Output Fields

Field Name

Field Description

Path computation using abstract hops for LSP

Name of the LSP for which the abstract hop computation is performed.

Path type

The type of the path can be primary or secondary.

Path name

Name of the path.


Credibility value associated with the interior gateway protocol in use.

Total no of CSPF passes

Number of constrained shortest path passes for the abstract hop.

CSPF pass no

Constrained shortest path pass number for the abstract hop computation.

Start address of the pass

IP address where the pass starts.


Name of the abstract hop.


Destination IP address for a node in the pass.


State of the backtracking:

  • Valid

  • Disqualified

Sample Output

show mpls lsp abstract-computation

Release Information

Command introduced in Junos OS Release 17.1.