Software Version Capability for BGP
draft-abraitis-bgp-version-capability-08

Document Type Active Internet-Draft (individual)
Author Donatas Abraitis 
Last updated 2020-09-08 (latest revision 2020-08-29)
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Network Working Group                                        D. Abraitis
Internet-Draft                                                 Hostinger
Intended status: Informational                           August 29, 2020
Expires: March 2, 2021

                  Software Version Capability for BGP
                draft-abraitis-bgp-version-capability-08

Abstract

   In this document, we introduce a new BGP capability that allows the
   advertisement of a BGP speaker's routing daemon version.

   This BGP capability is an optional advertisement.  Implementations
   are not required to advertise the version nor to process received
   advertisements.

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
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   This Internet-Draft will expire on March 2, 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Specification of Requirements . . . . . . . . . . . . . . . .   2
   3.  Software Version Capability . . . . . . . . . . . . . . . . .   3
     3.1.  Capabilities Length Overflow  . . . . . . . . . . . . . .   4
   4.  Operation . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Example Usage . . . . . . . . . . . . . . . . . . . . . .   5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   In modern data center designs, we tend to have conventional routers
   participating in the routing process.  And the fleet of routers has
   different versions of routing daemon.  This means that knowing which
   versions of the routing daemons are running the various routers in
   the network can be a crucial factor in quickly identifying the root
   cause of any protocol or network problems.

   This BGP capability is an optional advertisement.  Implementations
   are not required to advertise the version nor to process received
   advertisements.

   Information about the version of the routing daemon could also be
   exchanged in protocols such as LLDP and CDP.  However, in
   containerized environments, it is very hard and not recommended to
   exchange this information between background processes.  Therefore,
   and to help minimize operational costs, it is helpful to exchange the
   routing daemon information between BGP peers directly.

2.  Specification of Requirements

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "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.

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3.  Software Version Capability

   Although this document is not an IETF Standards Track document, it
   makes use of the terminology from BCP 14 in order to clearly state
   the implementation behaviors.

   Capabilities advertisements with BGP are defined in [RFC5492].  They
   utilize the BGP Capabilities Optional Parameter that contains one or
   more triples <Capability Code, Capability Length, Capability Value>.
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