draft-ietf-idr-custom-decision-04.txt   draft-ietf-idr-custom-decision-05.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: May 22, 2014 Expires: April 25, 2015 Ericsson
November 18, 2013 October 22, 2014
BGP Custom Decision Process BGP Custom Decision Process
draft-ietf-idr-custom-decision-04 draft-ietf-idr-custom-decision-05
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.
skipping to change at page 1, line 42 skipping to change at page 1, line 42
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 May 22, 2014. This Internet-Draft will expire on April 25, 2015.
Copyright Notice Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the Copyright (c) 2014 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
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License. described in the Simplified BSD License.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3 2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. The BGP Cost Community . . . . . . . . . . . . . . . . . . . 3 3. The BGP Cost Community . . . . . . . . . . . . . . . . . . . 3
4. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5. Deployment Considerations . . . . . . . . . . . . . . . . . . 5 5. Deployment Considerations . . . . . . . . . . . . . . . . . . 5
6. Security Considerations . . . . . . . . . . . . . . . . . . . 6 6. Security Considerations . . . . . . . . . . . . . . . . . . . 6
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 B.4. Changes between the -03 and -04 versions. . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8 B.5. Changes between the -04 and -05 versions. . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9
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
beginning of the decision process. There is no way to configure beginning of the decision process. There is no way to configure
skipping to change at page 6, line 48 skipping to change at page 6, line 48
for the Opaque Extended Community type. for the Opaque Extended Community type.
9. References 9. References
9.1. Normative References 9.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997. Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC4020] Kompella, K. and A. Zinin, "Early IANA Allocation of [RFC4020] Kompella, K. and A. Zinin, "Early IANA Allocation of
Standards Track Code Points", BCP 100, RFC 4020, February Standards Track Code Points", RFC 4020, February 2005.
2005.
[RFC4360] Sangli, S., Tappan, D., and Y. Rekhter, "BGP Extended [RFC4360] Sangli, S., Tappan, D., and Y. Rekhter, "BGP Extended
Communities Attribute", RFC 4360, February 2006. Communities Attribute", RFC 4360, February 2006.
[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an [RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", BCP 26, RFC 5226, IANA Considerations Section in RFCs", BCP 26, RFC 5226,
May 2008. May 2008.
9.2. Informative References 9.2. Informative References
[BGP_EXT] Internet Assigned Numbers Authority, "BGP Extended [BGP_EXT] Internet Assigned Numbers Authority, "BGP Extended
Communities", 2010, <http://www.iana.org/assignments/bgp- Communities", 2010, <http://www.iana.org/assignments/
extended-communities>. bgp-extended-communities>.
[BGP_PAR] Internet Assigned Numbers Authority, "BGP Parameters", [BGP_PAR] Internet Assigned Numbers Authority, "BGP Parameters",
2010, <http://www.iana.org/assignments/bgp-parameters/>. 2010, <http://www.iana.org/assignments/bgp-parameters/>.
[RFC4271] Rekhter, Y., Li, T., and S. Hares, "A Border Gateway [RFC4271] Rekhter, Y., Li, T., and S. Hares, "A Border Gateway
Protocol 4 (BGP-4)", RFC 4271, January 2006. Protocol 4 (BGP-4)", RFC 4271, January 2006.
[RFC4456] Bates, T., Chen, E., and R. Chandra, "BGP Route [RFC4456] Bates, T., Chen, E., and R. Chandra, "BGP Route
Reflection: An Alternative to Full Mesh Internal BGP Reflection: An Alternative to Full Mesh Internal BGP
(IBGP)", RFC 4456, April 2006. (IBGP)", RFC 4456, April 2006.
skipping to change at page 8, line 37 skipping to change at page 9, line 5
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. B.4. Changes between the -03 and -04 versions.
o Updated authors' contact information. o Updated authors' contact information.
B.5. Changes between the -04 and -05 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
Ericsson
Email: russw@riw.us Email: russw@riw.us
 End of changes. 10 change blocks. 
11 lines changed or deleted 16 lines changed or added

This html diff was produced by rfcdiff 1.41. The latest version is available from http://tools.ietf.org/tools/rfcdiff/