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Network Working Group                                          D. Walton
Internet-Draft                                                   D. Dutt
Intended status: Standards Track                        Cumulus Networks
Expires: November 16, 2015                                  May 15, 2015


             Fully Qualified Domain Name Capability for BGP
                draft-walton-bgp-hostname-capability-00

Abstract

   In this document we propose a BGP capability that allows the
   advertisemnet of a BGP speaker's FQDN (Fully Qualified Domain Name).

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
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on November 16, 2015.

Copyright Notice

   Copyright (c) 2015 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
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   described in the Simplified BSD License.






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1.  Introduction

   BGP can be made much easier to troubleshoot by displaying the
   hostname of the speaker in addition to the speaker's IP address.
   This is especially true for IPv6 addresses due to their length.  If
   all BGP sessions were via global addresses then DNS could be used to
   resolve the hostname for each addresss.  BGP sessions can be via IPv6
   link-local addresses which will not have a DNS entry per Sectino 2.1
   of [RFC4472].  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",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   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

      Hostname:

         The hostname encoded via UTF-8

      Domain Name Length:

         The number of characters in the Domain Name

      Domain Name:



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         The domain name encoded via UTF-8

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.

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

   [RFC4472]  Durand, A., Ihren, J., and P. Savola, "Operational
              Considerations and Issues with IPv6 DNS", RFC 4472, April
              2006.

   [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,
              <https://github.com/CumulusNetworks/quagga/
              commit/45d4b165b9d01c0e98082e7d1e90a3b1a60b1085>.

Authors' Addresses

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

   Email: dwalton@cumulusnetworks.com



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

   Email: ddutt@cumulusnetworks.com












































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