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Home Documentation Junos OS Junos CLI Reference CLI Reference U

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use-post-convergence-lfa (Protocols OSPF)

date_range 20-Nov-23
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Syntax

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use-post-convergence-lfa <maximum-backup-paths maximum-backup-paths> <maximum-labels maximum-labels> ;

Hierarchy Level

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[edit logical-systems name protocols ospf backup-spf-options],
[edit logical-systems name routing-instances name protocols ospf backup-spf-options],
[edit protocols ospf backup-spf-options],
[edit routing-instances name protocols ospf backup-spf-options]

Description

Calculate post-convergence MPLS fast reroute (FRR) backup next hops for the OSPF protocol using segment routing (SR). Junos OS allows you to control the maximum number of equal-cost multipath (ECMP) backup paths installed for a given destination. Junos OS also allows you to control the maximum number of labels in the installed backup paths. Configure the use-source-packet-routing statement at [edit protocols ospf backup-spf-options] hierarchy level to allow the backup paths to be available for inet.0 routing table along with inet.3 routing table.

Options

maximum-backup-paths

Set the maximum number of equal-cost post-convergence backup paths to be installed.

  • Default: 1

  • Range: 1-8

maximum-labels

Set the maximum number of labels used to construct a post-convergence backup path. If the backup path for a particular prefix requires more labels than the configured maximum labels, then the backup path for that particular prefix is not installed.

Note:

If the maximum-labels option is not configured, then the maximum number of labels used to construct a post-convergence backup path is 3.

  • Default: 3

  • Range: 2-5

Required Privilege Level

routing

Release Information

Statement introduced in Junos OS Release 18.2R1 for MX Series, PTX Series, and QFX Series.

Related Documentation

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