Carrying NRP related Information in MPLS Packets

A Network Resource Partition (NRP) is a subset of the network resources and associated policies on each of a connected set of links in the underlay network. An NRP could be used as the underlay to support one or a group of enhanced VPN services. Multiple NRPs can be created by network operator to meet the diverse requirements of different enhanced VPN services. In packet forwarding, some fields in the data packet needs to be used as the NRP Selector to identify the NRP the packet belongs to, so that the NRP-specific processing can be executed on the packet. This document proposes a mechanism to carry the NRP Selector ID and related information in MPLS packets. The procedure for processing the NRP Selector ID and related information is also specified.