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Configuring IS-IS to Ignore the Metric of RSVP Label-Switched Paths

You can configure IS-IS to ignore the metric of RSVP label-switched paths (LSPs) when LDP tunneling is enabled. If you are using the RSVP for traffic engineering, you can run LDP simultaneously to eliminate the distribution of external routes in the core. The LSPs established by LDP are tunneled through the LSPs established by RSVP. LDP effectively treats the traffic-engineered LSPs as single hops. Ignoring the metric of RSVP LSPs avoids mutual dependency between IS-IS and RSVP, eliminating the time period when the RSVP metric used for tunneling traffic is not up to date.

To configure IS-IS to ignore the metric of RSVP LSPs, include the ignore-lsp-metrics statement:



traffic-engineering {

ignore-lsp-metrics;
}

For a list of hierarchy levels at which you can configure this statement, see the statement summary section for this statement.

For more information about configuring label-switched paths and MPLS, see the JUNOS MPLS Applications Configuration Guide.

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