draft-ietf-idr-custom-decision-03.txt   draft-ietf-idr-custom-decision-04.txt 
Inter-Domain Routing A. Retana Inter-Domain Routing A. Retana
Internet-Draft Cisco Systems, Inc. Internet-Draft Cisco Systems, Inc.
Intended status: Standards Track R. White Intended status: Standards Track R. White
Expires: November 21, 2013 Verisign Expires: May 22, 2014
May 20, 2013 November 18, 2013
BGP Custom Decision Process BGP Custom Decision Process
draft-ietf-idr-custom-decision-03 draft-ietf-idr-custom-decision-04
Abstract Abstract
The BGP specification defines a Decision Process for installation of The BGP specification defines a Decision Process for installation of
routes into the Loc-RIB. This process takes into account an routes into the Loc-RIB. This process takes into account an
extensive series of path attributes, which can be manipulated to extensive series of path attributes, which can be manipulated to
indicate preference for specific paths. It is cumbersome (if at all indicate preference for specific paths. It is cumbersome (if at all
possible) for the end user to define policies that will select, after possible) for the end user to define policies that will select, after
partial comparison, a path based on subjective local (domain and/or partial comparison, a path based on subjective local (domain and/or
node) criteria. node) criteria.
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 21, 2013. This Internet-Draft will expire on May 22, 2014.
Copyright Notice Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 6 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
9.1. Normative References . . . . . . . . . . . . . . . . . . 6 9.1. Normative References . . . . . . . . . . . . . . . . . . 6
9.2. Informative References . . . . . . . . . . . . . . . . . 7 9.2. Informative References . . . . . . . . . . . . . . . . . 7
Appendix A. Cost Community Point of Insertion Registry . . . . . 7 Appendix A. Cost Community Point of Insertion Registry . . . . . 7
Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 8 Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 8
B.1. Changes between the -00 and -01 versions. . . . . . . . . 8 B.1. Changes between the -00 and -01 versions. . . . . . . . . 8
B.2. Changes between the -01 and -02 versions. . . . . . . . . 8 B.2. Changes between the -01 and -02 versions. . . . . . . . . 8
B.3. Changes between the -02 and -03 versions. . . . . . . . . 8 B.3. Changes between the -02 and -03 versions. . . . . . . . . 8
B.4. Changes between the -03 and -04 versions. . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction 1. Introduction
There are a number of metrics available within the BGP decision There are a number of metrics available within the BGP decision
process [RFC4271] which can be used to determine the exit point for process [RFC4271] which can be used to determine the exit point for
traffic, but there is no metric, or combination of metrics, which can traffic, but there is no metric, or combination of metrics, which can
be used to break a tie among generally equal paths. be used to break a tie among generally equal paths.
o LOCAL_PREF: The LOCAL_PREF is an absolute tie breaker near the o LOCAL_PREF: The LOCAL_PREF is an absolute tie breaker near the
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o Updated authors' contact information. o Updated authors' contact information.
o Added text to replace a step in the selection process. o Added text to replace a step in the selection process.
o Minor edits. o Minor edits.
B.3. Changes between the -02 and -03 versions. B.3. Changes between the -02 and -03 versions.
o No changes; just a refresh. o No changes; just a refresh.
B.4. Changes between the -03 and -04 versions.
o Updated authors' contact information.
Authors' Addresses Authors' Addresses
Alvaro Retana Alvaro Retana
Cisco Systems, Inc. Cisco Systems, Inc.
7025 Kit Creek Rd. 7025 Kit Creek Rd.
Research Triangle Park, NC 27709 Research Triangle Park, NC 27709
USA USA
Email: aretana@cisco.com Email: aretana@cisco.com
Russ White Russ White
Verisign
12061 Bluemont Way
Reston, VA 20190
USA
Email: riwhite@verisign.com Email: russw@riw.us
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