NSH and Segment Routing Integration for Service Function Chaining (SFC)
2018
This document describes two application scenarios where Network
Service Header (NSH) and Segment Routing (SR) techniques can be
deployed together to support Service Function Chaining (SFC) in an
efficient manner while maintaining separation of the service and
transport planes as originally intended by the SFC architecture. In
the first scenario, an NSH-based SFC is created using SR as the
transport between SFFs. SR in this case is just one of many
encapsulations that could be used to maintain the transport-
independent nature of NSH-based service chains. In the second
scenario, SR is used to represent each service hop of the NSH-based
SFC as a segment within the segment-list. SR and NSH in this case are
integrated. In both scenarios SR is responsible for steering packets
between SFFs along a given SFP while NSH is responsible for
maintaining the integrity of the service plane, the SFC instance
context, and any associated metadata. These application scenarios
demonstrate that NSH and SR can work jointly and complement each other
leaving the network operator with the flexibility to use whichever
transport technology makes sense in specific areas of their network
infrastructure, and still maintain an end-to-end service plane using
NSH.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
0
References
1
Citations
NaN
KQI