Configuration guidelines

Follow these guidelines when you establish a static LSP:

• On the ingress node, you must specify the outgoing label for the destination address (the FEC) and the next hop or the outgoing interface.

• On each transit node, you must specify the incoming label, the outgoing label, and the next hop or the outgoing interface.

• On the egress node, you must specify the incoming label.

• You can associate a static LSP with an LDP LSP to simplify packet processing when the following conditions are met:

  • Packets are forwarded over the static LSP and the LDP LSP to the destination.

  • The egress node of the static LSP is also the ingress node of the LDP LSP.

  After receiving a packet with the specified incoming label, the egress node of the static LSP swaps the label with the outgoing label for the LDP LSP. Then, the node forwards the packet to the next hop.

  To associate a static LSP with an LDP LSP, specify the incoming label and destination address on the egress node of the static LSP.

• The outgoing label specified on an LSR must be the same as the incoming label specified on the directly connected downstream LSR.