@misc{rfc7897, series = {Request for Comments}, number = 7897, howpublished = {RFC 7897}, publisher = {RFC Editor}, doi = {10.17487/RFC7897}, url = {https://www.rfc-editor.org/info/rfc7897}, author = {Dhruv Dhody and Udayasree Palle and Ramon Casellas}, title = {{Domain Subobjects for the Path Computation Element Communication Protocol (PCEP)}}, pagetotal = 35, year = 2016, month = jun, abstract = {The ability to compute shortest constrained Traffic Engineering Label Switched Paths (TE LSPs) in Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) networks across multiple domains has been identified as a key requirement. In this context, a domain is a collection of network elements within a common sphere of address management or path computational responsibility such as an Interior Gateway Protocol (IGP) area or an Autonomous System (AS). This document specifies a representation and encoding of a domain sequence, which is defined as an ordered sequence of domains traversed to reach the destination domain to be used by Path Computation Elements (PCEs) to compute inter-domain constrained shortest paths across a predetermined sequence of domains. This document also defines new subobjects to be used to encode domain identifiers.}, }