--- 1/draft-ietf-grow-wkc-behavior-06.txt 2019-06-10 18:13:09.664350431 -0700 +++ 2/draft-ietf-grow-wkc-behavior-07.txt 2019-06-10 18:13:09.684350941 -0700 @@ -1,42 +1,42 @@ Network Working Group J. Borkenhagen Internet-Draft AT&T Updates: 1997 (if approved) R. Bush -Intended status: Standards Track Internet Initiative Japan +Intended status: Standards Track IIJ & Arrcus Expires: December 12, 2019 R. Bonica Juniper Networks S. Bayraktar Cisco Systems June 10, 2019 Well-Known Community Policy Behavior - draft-ietf-grow-wkc-behavior-06 + draft-ietf-grow-wkc-behavior-07 Abstract Well-Known BGP Communities are manipulated differently across various current implementations; resulting in difficulties for operators. Network operators should deploy consistent community handling across their networks while taking the inconsistent behaviors from the various BGP implementations into consideration.. This document recommends specific actions to limit future inconsistency, namely BGP implementors must not create further inconsistencies from this point forward. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", - "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" are to - be interpreted as described in RFC 2119 [RFC2119] only when they - appear in all upper case. They may also appear in lower or mixed - case as English words, without normative meaning. + "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and + "OPTIONAL" in this document are to be interpreted as described in BCP + 14 [RFC2119] [RFC8174] when, and only when, they appear in all + capitals, as shown here. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. @@ -179,30 +179,30 @@ communities. 4.1. Note on an Inconsistency The IANA publishes a list of Well-Known Communities [IANA-WKC]. Cisco IOS XR's set of Well-Known communities that "set community" will not overwrite diverges from the IANA's list of Well-Known communities. Quite a few Well-Known communities from IANA's list do not receive special treatment in Cisco IOS XR, and at least one - specific community on Cisco IOS XR's special treatment list (internet - == 0:0) is not really on IANA's list -- it's taken from the - "Reserved" range [0x00000000-0x0000FFFF]. + community on Cisco IOS XR's special treatment list, internet == 0:0, + is not formally a Well-Known Community as it is not in [IANA-WKC]; + but taken from the Reserved range [0x00000000-0x0000FFFF]. This merely notes an inconsistency. It is not a plea to 'protect' the entire IANA list from "set community." 5. Note for Those Writing RFCs for New Community-Like Attributes - > When establishing new [RFC1997]-like attributes (large communities, + When establishing new [RFC1997]-like attributes (large communities, wide communities, etc.), RFC authors should state explicitly how the > new attribute is to be handled. 6. Action Items Network operators are encouraged to limit their use of the "set" directive (within reason), to improve consistency across platforms. Unfortunately, it would be operationally disruptive for vendors to change their current implementations. @@ -250,35 +250,39 @@ [RFC1997] Chandra, R., Traina, P., and T. Li, "BGP Communities Attribute", RFC 1997, DOI 10.17487/RFC1997, August 1996, . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . + [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC + 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, + May 2017, . + Authors' Addresses Jay Borkenhagen AT&T 200 Laurel Avenue South Middletown, NJ 07748 United States of America Email: jayb@att.com Randy Bush - Internet Initiative Japan + IIJ & Arrcus 5147 Crystal Springs Bainbridge Island, WA 98110 - United States of America + US Email: randy@psg.com Ron Bonica Juniper Networks 2251 Corporate Park Drive Herndon, VA 20171 US Email: rbonica@juniper.net