This document defines a Border Gateway Protocol Network Layer
Reachability Information (BGP NLRI) encoding format that can be used
to distribute traffic Flow Specifications. This allows the routing
system to propagate information regarding more specific components of
the traffic aggregate defined by an IP destination prefix.
It also specifies BGP Extended Community encoding formats, that can
be used to propagate Traffic Filtering Actions along with the Flow
Specification NLRI. Those Traffic Filtering Actions encode actions a
routing system can take if the packet matches the Flow Specification.
This document obsoletes both RFC5575 and RFC7674.
Working Group Summary
This draft clarifies the unclear specifications in RFC5575 and provide
clear rules for actions which may interfere with each other. There were
many discussions in the WG about this specification and the future of
flow spec and its extensibility. The process was long and contentious
at times, but the consensus is strong.
Implementation report can be found at https://trac.ietf.org/trac/idr/wiki/draft-ietf-rfc5575bis%20implementationsrfc5575 has been used for more than a decade.
Document Shepherd: Jie Dong
Responsible Area Director: Alvaro Retana