The Path Computation Element (PCE) has been identified as an appropriate technology for the determination of the paths of point-to-multipoint (P2MP) TE LSPs

functions f and predicates Q are assumed to be from a given "built-in" set of computable functions and predicates (see Section 1.4 and Church's thesis in Section 4.1). In

Paths that span multiple domains may be computed using the distributed model with one or more PCEs responsible for each domain, or the centralized model by defining a

The PCE Communication Protocol (PCECP) is used to communicate computation requests from Path Computation Clients (PCCs) to PCEs, and to return computed paths in

Since the per-domain approach to path computation is undertaken in stages where every entry border router to a domain computes the path in the corresponding domain, the most

Inter-layer traffic engineering includes using mechanisms that allow the computation of end-to-end paths across layers (known as inter-layer path computation) and mechanisms that

The PCE path computation request and reply messages will need the following additional parameters to indicate to the receiving PCE that the request and reply messages have

This is clearly advisable because the upstream LSRs might otherwise complete their cross-connections more rapidly and encourage the ingress to start transmitting data with

The Reconfigure-Request message is sent by a DHCPv6 relay agent to notify a DHCPv6 server about a configuration information change, so that the DHCPv6 server can send