Inter-domain service function chaining

摘要

In one embodiment, a method includes receiving a packet in a service function chain at a network device located at a border of a first administrative domain, the packet comprising a service function path identifier and a service index, processing the packet at the network device, wherein processing comprises modifying the packet based on the service function path identifier and the service index to direct the packet to a second administrative domain, and forwarding the packet from the network device to the second administrative domain for processing in the service function chain. The service function chain extends over the first and second administrative domains. An apparatus and logic are also disclosed herein.

主权项

1. A method comprising:
receiving a packet in a service function chain at a network device located at a border of a first administrative domain, the packet comprising a service function path identifier and a service index, said service function chain defining a set of service nodes hosting service functions and an order for applying said service functions; processing the packet at the network device, wherein processing comprises modifying the packet based on said service function path identifier and said service index to direct the packet to a second administrative domain; and forwarding the packet from the network device to said second administrative domain for processing in said service function chain; wherein said service function chain extends over said first and second administrative domains; and wherein said first administrative domain and said second administrative domain communicate via the network device at the border of said first administrative domain, each of said first and second administrative domains defining a routing domain where local routing policies are applied.