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Topology-Driven LSPs

Topology-driven LSPs are implemented for best-effort, hop-by-hop routing. In topology-driven LSP mode, LDP automatically sets up LSPs for IGP, direct, and static routes, subject to filtering by access-lists. JUNOSe supports downstream-unsolicited LDP using the platform label space.

If you use the topology-driven LSP mode to forward plain IP packets, use the ldp ip-forwarding command to place LSPs into the IP routing table for forwarding plain IP traffic.

You can use the mpls ldp advertise-labels command to limit the number of routes for which labels are advertised. In most cases, you can issue mpls ldp advertise-labels host-only.

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