Configure the Address of the Ingress Router

The local router always is considered to be the ingress router, which is the beginning of the LSP. The software automatically determines the proper outgoing interface and IP address to use to reach the next router in an LSP.

By default, the router ID is chosen as the address of the ingress router. To override the automatic selection of the source address, specify a source address in the from statement at the [edit protocols mpls label-switched-path lsp-path-name ] hierarchy level:

[edit protocols mpls label-switched-path lsp-path-name ]

from address ; 

The outgoing interface used by the LSP is not affected by the source address that
you configure.