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MPLS

  • Conditional RSVP LSP metrics (cRPD, MX960, PTX1000, and QFX10002)—Starting in Junos OS Release 22.1R1, you can configure conditional metrics for local statically configured label-switched paths (LSPs). The conditional metrics are based on the dynamically changing IGP metric. Junos OS changes the LSP metric to the configured conditional metric that corresponds to the highest threshold reached by the IGP metric. You can configure up to four conditional metrics for an LSP.

    By default, the IGP metric of routes configured with the install statement is the IGP metric value of the LSP destination route. If you configure the track-igp-metric <install-v4-prefixes> <install-v6-prefixes> statement at the [edit protocols mpls] or [edit protocols mpls label-switched-path lsp-name] hierarchy level, routes installed by IGP use the IGP metric of the prefix instead.

    Use the conditional igp-metric-threshold threshold-metric-value static-metric-condition-value statement at the [edit protocols mpls label-switched-path lsp-name metric] hierarchy level to configure this feature. To check whether the conditional metric is configured, use the show mpls lsp extensive command.

    [See Configuring LSP Metrics, metric (Protocols MPLS), track-igp-metric (LSP), conditional-metric, and show mpls lsp extensive.]

  • MPLS TTL propagation flexibility for LDP-signaled LSPs (MX80, MX104, MX150, MX204, MX240, MX480, MX960, MX2008, MX2010, MX2020, MX10003, MX10008, MX10016, PTX1000, PTX5000, PTX10001, PTX10008, PTX10016, and QFX10002)—Starting in Junos OS Release 22.1R1, we support disabling time-to-live (TTL) propagation at a more granular level. You can disable TTL propagation specifically for LDP-signaled label-switched paths (LSPs). When a route is very long, disable TTL propagation to ensure that the TTL doesn't expire while the packet is traversing the path. This feature also gives you more flexibility in hiding your network topology.

    To disable TTL propagation for LDP-signaled LSPs, use the no-propagate-ttl statement at the [edit protocol ldp] hierarchy level.

    Note:

    If the TTL value of the top label is less than the TTL value of the bottom label at an egress node, Junos OS copies the TTL value from the top label to the bottom label. In this case, the TTL value can still propagate down even when no-propagate-ttl is configured.

    [See no-propagate-ttl.]

  • Traffic engineering databaseand BGP Link-State (BGP-LS) support for IPv6 prefixes and IPv6 adjacency SIDs in MPLS (MX80, MX104, MX150, MX204, MX240, MX480, MX960, MX2008, MX2010, MX2020, MX10003, MX10008, MX10016, PTX1000, PTX5000, PTX10001, PTX10008, and PTX10016)—Starting in Junos OS Release 22.1 R1, we have made the following IPv6 enhancements.

    • Support Link network layer reachability information (NLRI) attributes for IPv6 segment routing (SR)-MPLS.
    • Support for IPv6 prefix NLRI.
    • Support for IPv6 attributes export from LSDIST to traffic engineering database.
    Note:

    We support only the IS-IS interior gateway protocol (IGP).

    We've enhanced the outputs of the following existing operational commands to include newly added attributes.

    • show ted database extensive—Enhanced the CLI output to include newly added IPv6 SR-MPLS attributes.
    • show ted link detail—Enhanced the CLI output to include newly added IPv6 SR-MPLS attributes.
    • show route table—Enhanced the CLI output to include newly added NLRI (IPv6 prefix NLRI).
    • show route—Included additional parameters to filter entries for viewing in the lsdist.0 table. We've added additional options to include IPv6 prefixes.
    • show ted—Added the show command to display the list of IPv6 and IPv4 prefixes, respectively, in the traffic engineering database. For example, show ted [ipv6-prefix | ipv4-prefix].