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Network Working Group                                          D. Walton
Internet-Draft                                                   D. Dutt
Intended status: Standards Track                        Cumulus Networks
Expires: January 7, 2016                                    July 6, 2015

                      Hostname Capability for BGP


   In this document, we introduce a new BGP capability that allows the
   advertisemnet of a BGP speaker's hostname.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on January 7, 2016.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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1.  Introduction

   BGP is increasingly used inside the data center.  Due to the sheer
   scale of devices involved, simplifying troubleshooting BGP would be
   very useful.  One simple way to ease the troubleshooting is to
   display the hostname of the speaker in addition to the speaker's IP
   address.  This document defines a new BGP capability that allows the
   exchange of a speaker's FQDN.

2.  Specification of Requirements

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   document are to be interpreted as described in [RFC2119].

3.  FQDN Capability

   The FQDN Capability is a new BGP capability [RFC5492].  The
   Capability Code for this capability is specified in the IANA
   Considerations section of this document.  The Capability Length field
   of this capability is variable.  The Capability Value field consists
   of the following:

                |  Hostname Length (1 octet)     |
                |  Hostname (variable)           |
                |  Domain Name Length (1 octet)  |
                |  Domain Name (variable)        |

      Hostname Length:

         The number of characters in the Hostname


         The hostname encoded via UTF-8

      Domain Name Length:

         The number of characters in the Domain Name

      Domain Name:

         The domain name encoded via UTF-8

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4.  Operation

   The FQDN Capability SHOULD only be used for displaying the hostname
   and/or domain name of a speaker in order to make troubleshooting
   easier.  The hostname and domain name used are assumed to be
   extracted from the hostname and domain name set on the device.  While
   there are other ways to potentially obtain the same information,
   having standard BGP show commands use the hostname makes the use of
   this option quite powerful.

5.  IANA Considerations

   IANA has assigned capability number TBD for the FQDN Capability
   described in this document.  This registration is in the BGP
   Capability Codes registry.

6.  Security Considerations

   This document introduces no new security concerns to BGP or other
   specifications referenced in this document.

7.  References

7.1.  Normative References

   [RFC5492]  Scudder, J. and R. Chandra, "Capabilities Advertisement
              with BGP-4", RFC 5492, February 2009.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

7.2.  Implementation References

   [quagga]   Dutt, D., "Quagga - BGP FQDN Capability", May 2015,

Authors' Addresses

   Daniel Walton
   Cumulus Networks
   3701 NW Cary Parkway, Suite #300
   Cary, NC  27513

   Email: dwalton@cumulusnetworks.com

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   Dinesh Dutt
   Cumulus Networks
   185 E. Dana Street
   Mountain View, CA  94041

   Email: ddutt@cumulusnetworks.com

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