RFC 3359
Reserved Type, Length and Value (TLV) Codepoints in Intermediate System to Intermediate System
Network Working Group T. Przygienda Request for Comments: 3359 Xebeo Category: Informational August 2002 Reserved Type, Length and Value (TLV) Codepoints in Intermediate System to Intermediate System Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2002). All Rights Reserved.Abstract
This document describes implementation codepoints within Intermediate System to Intermediate System (IS-IS) used today by several ISPs for routing within their clouds. IS-IS is an interior gateway routing protocol developed originally by OSI and used with IP extensions as Interior Gateway Protocol (IGP). This document summarizes all Table, Length and Value (TLV) codepoints that are being used by the protocol and its pending extensions.
1. TLV Codepoints Reserved
_____________________________________________________________________ Name Value IIH LSP SNP Status _____________________________________________________________________ Area Addresses 1 y y n ISO 10589 IIS Neighbors 2 n y n ISO 10589 ES Neighbors 3 n y n ISO 10589 Part. DIS 4 n y n ISO 10589 Prefix Neighbors 5 n y n ISO 10589 IIS Neighbors 6 y n n ISO 10589 Padding 8 y n n ISO 10589 LSP Entries 9 n n y ISO 10589 Authentication 10 y y y ISO 10589 Opt. Checksum 12 y n y IETF-draft LSPBufferSize 14 n y n ISO 10589 Rev 2 Draft TE IIS Neigh. 22 n y n IETF-draft DECnet Phase IV 42 y n n DEC (ancient) Lucent Proprietary 66 n y n IP Int. Reach 128 n y n RFC 1195 Prot. Supported 129 y y n RFC 1195 IP Ext. Address 130 n y n RFC 1195 IDRPI 131 n y y RFC 1195 IP Intf. Address 132 y y n RFC 1195 Illegal 133 n n n RFC 1195 (not used) Router ID 134 n y n IETF-draft TE IP. Reach 135 n y n IETF-draft Dynamic Name 137 n y n RFC 2763 Nortel Proprietary 176 n y n Nortel Proprietary 177 n y n Restart TLV 211 y n n IETF-draft MT-ISN 222 n y n IETF-draft M-Topologies 229 y y n IETF-draft IPv6 Intf. Addr. 232 y y n IETF-draft MT IP. Reach 235 n y n IETF-draft IPv6 IP. Reach 236 n y n IETF-draft MT IPv6 IP. Reach 237 n y n IETF-draft P2P Adjacency State 240 y n n IETF-draft
2. Assignment Procedures
This document is provided to avoid possible future conflicts in the assignment of TLV numbers. It does not constitute or represent any standard or authority assigning TLV numbers. TLV assignment happens on a shared, informational basis between the ISO, SIF and the IETF working groups. The core ISIS protocol is being specified in the ISO standards body, IP extensions to it however are products of the ISIS working group in IETF. Since ISO does not provide a numbering authority and IANA is only responsible for IP related coding points, no plausible central authority to assign TLV numbers exists as of today. This document will be periodically updated by newer versions in the fashion of [RP94] and successors. It may be replaced at any given point in time by some type of official registry. This document will not indicate specific documents using the codepoints, nor will it resolve the sub-TLV codepoints.3. Acknowledgments
Thanks to Les Ginsberg and others for pointing out details and improving this work.4. Security Consideration
ISIS security applies to the work presented. No specific security issues are being introduced.5. References
[Cal90a] R. Callon. OSI ISIS Intradomain Routing Protocol. INTERNET-RFC, Internet Engineering Task Force, February 1990. [Cal90b] R. Callon. Use of OSI ISIS for Routing in TCP/IP and Dual Environments. INTERNET-RFC, Internet Engineering Task Force, December 1990. [ISO90] ISO. Information Technology - Telecommunications and Information Exchange between Systems - Intermediate System to Intermediate System Routing Exchange Protocol for Use in Conjunction with the Protocol for Providing the Connectionless-Mode Network Service. ISO, 1990. [RP94] Reynolds, J., "Assigned Numbers; RFC 1700 is Replaced by an On-line Database", RFC 3232, January, 2002.
6. Authors' Addresses
Tony Przygienda Xebeo One Cragwood Road South Plainfield, NJ 07080 Phone: (908) 222 4225 Email: prz@xebeo.com
7. Full Copyright Statement
Copyright (C) The Internet Society (2002). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society.