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Enabling LDP over RSVP-Established LSPs in Heterogeneous Networks

Some other vendors use an OSPF metric of 1 for the loopback address. Juniper Networks routers use an OSPF metric of 0 for the loopback address. This might require that you manually configure the RSVP metric when deploying LDP tunneling over RSVP LSPs in heterogeneous networks.

When a Juniper Networks router is linked to another vendor’s router through an RSVP tunnel, and LDP tunneling is also enabled, by default the Juniper Networks router might not use the RSVP tunnel to route traffic to the LDP destinations downstream of the other vendor’s egress router if the RSVP path has a metric of 1 larger than the physical OSPF path.

To ensure that LDP tunneling functions properly in heterogeneous networks, you can configure OSPF to ignore the RSVP LSP metric by including the ignore-lsp-metrics statement:




ignore-lsp-metrics;

You can configure this statement at the following hierarchy levels:

[edit protocols ospf traffic-engineering shortcuts]
[edit logical-systems logical-system-name protocols ospf traffic-engineering shortcuts]

To enable LDP over RSVP LSPs, you also still need to complete the procedure in Enabling LDP over RSVP-Established LSPs.

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