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RFC 4271, "A Border Gateway Protocol 4 (BGP-4)", January 2006

Source of RFC: idr (rtg)

Errata ID: 4496
Status: Held for Document Update
Type: Editorial

Reported By: Alexander Okonnikov
Date Reported: 2015-10-10
Held for Document Update by: Alvaro Retana
Date Held: 2015-10-12

Section 9.1.1 says:

... If the return value indicates the route is
      ineligible, the route MAY NOT serve as an input to the next phase
      of route selection; ...

It should say:

... If the return value indicates the route is
      ineligible, the route MUST NOT serve as an input to the next phase
      of route selection; ...

Notes:

RFC 2119 does not define special word MAY NOT. Obviously, ineligible route must not be used in route selection.
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