draft-ietf-idr-bgp4-cap-neg-04.txt   draft-ietf-idr-bgp4-cap-neg-05.txt 
Network Working Group Ravi Chandra Network Working Group Ravi Chandra
Internet Draft Cisco Systems Internet Draft Siara Systems
Expiration Date: March 2000 John G. Scudder Expiration Date: August 2000 John G. Scudder
Internet Engineering Group, LLC cisco Systems
Capabilities Negotiation with BGP-4 Capabilities Negotiation with BGP-4
draft-ietf-idr-bgp4-cap-neg-04.txt draft-ietf-idr-bgp4-cap-neg-05.txt
1. Status of this Memo 1. Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026 except that the right to all provisions of Section 10 of RFC2026 except that the right to
produce derivative works is not granted. produce derivative works is not granted.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
skipping to change at page 3, line 30 skipping to change at page 3, line 30
of the Capability Value field in octets. of the Capability Value field in octets.
Capability Value: Capability Value:
Capability Value is a variable length field that is interpreted Capability Value is a variable length field that is interpreted
according to the value of the Capability Code field. according to the value of the Capability Code field.
A particular capability, as identified by its Capability Code, may A particular capability, as identified by its Capability Code, may
occur more than once within the Optional Parameter. occur more than once within the Optional Parameter.
This document reserves Capability Codes 128-255 for vendor-specific
applications.
This document reserves value 0.
Capability Codes (other than those reserved for vendor specific use)
are assigned only by the IETF consensus process and IESG approval.
5. Extensions to Error Handling 5. Extensions to Error Handling
This document defines new Error Subcode - Unsupported Capability. This document defines new Error Subcode - Unsupported Capability.
The value of this Subcode is 7. The Data field in the NOTIFICATION The value of this Subcode is 7. The Data field in the NOTIFICATION
message lists the set of capabilities that cause the speaker to send message lists the set of capabilities that cause the speaker to send
the message. Each such capability is encoded the same way as it was the message. Each such capability is encoded the same way as it was
encoded in the received OPEN message. encoded in the received OPEN message.
6. Security Considerations 6. IANA Considerations
This extension to BGP does not change the underlying security issues. As specified in this document, the Capability optional parameter
contains the Capability Code field. Capability Code value 0 is
reserved. Capability Code values 1 through 63 are to be assigned by
IANA using the "IETF Consensus" policy defined in RFC2434. Capability
Code values 64 through 127 are to be assigned by IANA, using the
"First Come First Served" policy defined in RFC2434. Capability Code
values 128 through 255 are vendor-specific, and values in this range
are not to be assigned by IANA.
7. Acknowledgements 7. Security Considerations
This extension to BGP does not change the underlying security issues
inherent in the existing BGP [Heffernan].
8. Acknowledgements
The authors would like to thank members of the IDR Working Group for The authors would like to thank members of the IDR Working Group for
their review and comments. their review and comments.
8. References 9. References
[BGP-4] Rekhter, Y., and T. Li, "A Border Gateway Protocol 4 (BGP- [BGP-4] Rekhter, Y., and T. Li, "A Border Gateway Protocol 4 (BGP-
4)", RFC 1771, March 1995. 4)", RFC 1771, March 1995.
9. Author Information [Heffernan] Heffernan, A., "Protection of BGP Sessions via the TCP
MD5 Signature Option", RFC2385, August 1998.
10. Author Information
Ravi Chandra Ravi Chandra
Siara Systems Incorporated
1195 Borregas Avenue
Sunnyvale, CA 94089
e-mail: rchandra@siara.com
John G. Scudder
Cisco Systems, Inc. Cisco Systems, Inc.
170 West Tasman Drive 170 West Tasman Drive
San Jose, CA 95134 San Jose, CA 95134
e-mail: rchandra@cisco.com e-mail: jgs@cisco.com
John G. Scudder
Internet Engineering Group, LLC
122 S. Main, Suite 280
Ann Arbor, MI 48104
e-mail: jgs@ieng.com
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