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Status: Reported (1)

RFC 8214, "Virtual Private Wire Service Support in Ethernet VPN", August 2017

Source of RFC: bess (rtg)

Errata ID: 5571
Status: Reported
Type: Technical

Reported By: gangadhara reddy chavva; SatishKumar N Rodd
Date Reported: 2018-12-10

Section 3.1 says:

C If set to 1, a control word [RFC4448] MUST be present
when sending EVPN packets to this PE. It is
recommended that the control word be included in the
absence of an entropy label [RFC6790].

It should say:

C If set to 1, a control word [RFC4448] MUST be present
when sending EVPN packets to this PE. It is
recommended that the control word be included in the
absence of an entropy label [RFC6790]. 

For detailed explanation of the behavior of EVPN VPWS 
session based on control word bit can be referred link: 
https://tools.ietf.org/html/rfc4447#section-6.2

which explains all combinations of control word 
configurations in detailed way whic was missing in RFC8214.

Notes:

RFC8214 doesn't mention the cases where control word configuration between the PE's can mismatch, disabled, enabled. which will lead to ambiguity in protocol implementation.

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