[Contents] [Prev] [Next] [Index] [Report an Error]

Scope of LSPs

For constrained-path LSPs, the LSP computation is confined to one IGP domain, and cannot cross any AS boundary. This prevents an AS from extending its IGP into another AS.

Explicit-path LSPs, however, can cross as many AS boundaries as necessary. Because intermediate hops are manually specified, the LSP does not depend on the IGP topology or a local forwarding table.

[Contents] [Prev] [Next] [Index] [Report an Error]