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Configuring Layer 2 Circuits over Both RSVP and LDP LSPs
You can configure two Layer 2 circuits between the same two routers, and have one Layer 2 circuit traverse an RSVP LSP and the other traverse an LDP LSP. To accomplish this, you need to configure two loopback addresses on the local router. You configure one of the loopback address for the Layer 2 circuit traversing the RSVP LSP. You configure the other loopback address to handle the Layer 2 circuit traversing the LDP LSP.
You also need to configure a packet switched network (PSN) tunnel endpoint for one of the Layer 2 circuits. It can be either the Layer 2 circuit traversing the RSVP LSP or the one traversing the LDP LSP. The PSN tunnel endpoint address is the destination address for the LSP on the remote router.
To configure the address for the PSN tunnel endpoint, include the psn-tunnel-endpoint statement:
You can include this statement at the following hierarchy levels:
- [edit protocols l2circuit neighbor address interface interface-name]
By default, the PSN tunnel endpoint for a Layer 2 circuit is identical to the neighbor address, which is also the same as the LDP neighbor address.
The tunnel endpoints on the remote router do not need to be loopback addresses.
The following example illustrates how you might configure a PSN tunnel endpoint:
The Layer 2 circuit configured for the t1-0/2/2.0 interface resolves in the inet3 routing table to 20.20.20.20. This could be either an RSVP route or a static route with an LSP next hop.
