Technical Summary
The Ethernet Virtual Private Network (EVPN) solution provides
Designated Forwarder (DF) election procedures for multihomed Ethernet
Segments. These procedures have been enhanced further by applying
Highest Random Weight (HRW) algorithm for Designated Forwarder
election in order to avoid unnecessary DF status changes upon a
failure. This document improves these procedures by providing a fast
Designated Forwarder election upon recovery of the failed link or
node associated with the multihomed Ethernet Segment. This document
updates Section 2.1 of [RFC8584] by optionally introducing delays
between some of the events therein.
The solution is independent of the number of EVPN Instances (EVIs)
associated with that Ethernet Segment and it is performed via a
simple signaling between the recovered node and each of the other
nodes in the multihoming group.
Working Group Summary
Was there anything in the WG process that is worth noting?
For example, was there controversy about particular points
or were there decisions where the consensus was
particularly rough?
None indicated.
Document Quality
Are there existing implementations of the protocol? Have a
significant number of vendors indicated their plan to
implement the specification? Are there any reviewers that
merit special mention as having done a thorough review,
e.g., one that resulted in important changes or a
conclusion that the document had no substantive issues? If
there was a MIB Doctor, Media Type, or other Expert Review,
what was its course (briefly)? In the case of a Media Type
Review, on what date was the request posted?
BESS has a policy of requiring at least one implementation for standards track
protocol drafts before proceeding. There is at least one known implementation
which has been declared on the BESS list during an implementation poll.
Personnel
The Document Shepherd for this document is Matthew Bocci. The
Responsible Area Director is Gunter Van de Velde.
IANA Note
IANA maintains the "EVPN Extended Community Sub-Types" registry set
up by [RFC7153]. IANA is requested to confirm the First Come First
Served assignment as follows:
Sub-Type Value Name Reference Date
-------------- ------------------------- ------------- ----
0x0F Service Carving Timestamp This document TBD
IANA should replace the field TBD with the date of publication of this
document as an RFC.
IANA maintains the "DF Election Capabilities" registry set up by
[RFC8584]. IANA is requested to make the following assignment from
this registry:
Bit Name Reference Date
---- ---------------- ------------- ----
3 Time Synchronization This document TBD
IANA should replace the field TBD with the date of publicaton of this
document as an RFC.