Network Working Group D. Walton Internet-Draft D. Dutt Intended status: Standards Track Cumulus Networks Expires: July 9, 2016 January 6, 2016 Hostname Capability for BGP draft-walton-bgp-hostname-capability-02 Abstract 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. 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 http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on July 9, 2016. Copyright Notice Copyright (c) 2016 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 (http://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 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Walton & Dutt Expires July 9, 2016 [Page 1] Internet-Draft Hostname Capability for BGP January 2016 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", "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: The domain name encoded via UTF-8 Walton & Dutt Expires July 9, 2016 [Page 2] Internet-Draft Hostname Capability for BGP January 2016 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. An example of showing hostname in various displays is show below in the output of the summary of BGP peering relationships, the first being the typical display today, and the second the display when displaying hostnames is enabled: cumulus@r1$ sudo cl-bgp summary BGP router identifier 10.0.0.1, local AS number 10 BGP table version 7000 RIB entries 7999, using 937 KiB of memory Peers 16, using 268 KiB of memory Peer groups 4, using 224 bytes of memory Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.0.0.2 4 10 103 204 0 0 0 00:01:21 1000 10.0.0.3 4 10 103 204 0 0 0 00:01:21 1000 10.0.0.4 4 10 203 204 0 0 0 00:01:21 2000 20.1.1.6 4 20 403 589 0 0 0 00:01:37 1000 20.1.1.7 4 20 403 589 0 0 0 00:01:35 1000 40.1.1.2 4 40 403 689 0 0 0 00:01:40 1000 40.1.1.6 4 40 403 689 0 0 0 00:01:48 1000 40.1.1.10 4 40 403 689 0 0 0 00:01:40 1000 Total number of neighbors 8 cumulus@r1$ Walton & Dutt Expires July 9, 2016 [Page 3] Internet-Draft Hostname Capability for BGP January 2016 cumulus@r1$ sudo cl-bgp summary BGP router identifier 10.0.0.1, local AS number 10 BGP table version 7000 RIB entries 7999, using 937 KiB of memory Peers 16, using 268 KiB of memory Peer groups 4, using 224 bytes of memory Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd r2(10.0.0.2) 4 10 104 205 0 0 0 00:02:05 1000 r3(10.0.0.3) 4 10 104 205 0 0 0 00:02:05 1000 r4(10.0.0.4) 4 10 204 205 0 0 0 00:02:05 2000 r6(20.1.1.6) 4 20 404 590 0 0 0 00:02:21 1000 r7(20.1.1.7) 4 20 404 590 0 0 0 00:02:19 1000 r8(40.1.1.2) 4 40 404 690 0 0 0 00:02:24 1000 r9(40.1.1.6) 4 40 404 690 0 0 0 00:02:32 1000 r10(40.1.1.10) 4 40 404 690 0 0 0 00:02:24 1000 Total number of neighbors 8 cumulus@r1$ 5. IANA Considerations IANA has assigned capability number 73 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, DOI 10.17487/RFC5492, February 2009, . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . Walton & Dutt Expires July 9, 2016 [Page 4] Internet-Draft Hostname Capability for BGP January 2016 7.2. Implementation References [quagga] Dutt, D., "Quagga - BGP FQDN Capability", January 2016, . Authors' Addresses Daniel Walton Cumulus Networks 3701 NW Cary Parkway, Suite #300 Cary, NC 27513 US Email: dwalton@cumulusnetworks.com Dinesh Dutt Cumulus Networks 185 E. Dana Street Mountain View, CA 94041 US Email: ddutt@cumulusnetworks.com Walton & Dutt Expires July 9, 2016 [Page 5]