
IS-IS TLV Codepoints per [RFC3563]  

(last updated 2007-05-21)

The range of values is 0-255.  Allocation of values in the 
registry has to be approved by the designated expert assigned
by the IESG. IETF SHALL keep JTC1/SC6 informed of TLV codepoint
values allocated, and JTC1/SC6 SHALL refer allocation requests 
arising within JTC1 constituencies to the IANA registry process.

TLV Codepoints Registry
=======================

Name                                  Value  IIH   LSP  SNP   Status/Reference
----------------------                -----  ---   ---  ---   ----------------
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    [RFC3358]
LSPBufferSize                            14   n     y    n    ISO 10589 Rev 2 Draft
Encapsulation Cap                        16   n     y    n    IETF-draft
The extended IS reachability TLV         22   n     y    n    [RFC3784]
DECnet Phase IV                          42   y     n    n    DEC (ancient)
Lucent Proprietary                       66   n     y    n
IP Int. Reach                           128   n     y    n    [RFC1195]
Prot. Supported                         129   y     y    n    [RFC1195]
IP Ext. Address                         130   n     y    n    [RFC1195]
IDRPI                                   131   n     y    y    [RFC1195]
IP Intf. Address                        132   y     y    n    [RFC1195]
Illegal                                 133   n     n    n    [RFC1195] (not used)
The Traffic Engineering router ID TLV   134   n     y    n    [RFC3784]
The extended IP reachability TLV        135   n     y    n    [RFC3784]
Dynamic Name                            137   n     y    n    [RFC2763]
GMPLS-SRLG                              138   n     y    n    [RFC4205]
Nortel Proprietary                      176   n     y    n
Nortel Proprietary                      177   n     y    n
Restart TLV                             211   y     n    n    [RFC3847]
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 3-Way Adj. State                    240   y     n    n    [RFC3373]
IS-IS Router CAPABILITY TLV             242   n     y    n    [RFC-ietf-isis-caps-07.txt]
Experimental TLV                        250   y     y    y    IETF-draft

Sub-TLVs for TLV 22 
===================

Allocations within this registry require documentation of the use of 
the allocated value and approval by the Designated Expert assigned
by the IESG.
   
Type     Description                                   Reference
----     -------------------------                     ---------
   0     unassigned                       
   1     unassigned                       
   2     unassigned                       
   3     Administrative group (color)                  [RFC3784]
   4     Link Local/Remote Identifiers                 [RFC4205]
   5     unassigned
   6     IPv4 interface address                        [RFC3784]
   7     unassigned
   8     IPv4 neighbor address                         [RFC3784]
   9     Maximum link bandwidth                        [RFC3784]
  10     Reservable link bandwidth                     [RFC3784]
  11     Unreserved bandwidth                          [RFC3784]
  12     unassigned
  13     unassigned
  14     unassigned
  15     unassigned
  16     unassigned
  17     unassigned
  18     TE Default metric                             [RFC3784]
  19     unassigned
  20     Link Protection Type                          [RFC4205]
  21     Interface Switching Capability Descriptor     [RFC4205] 
  22     Bandwidth Constraints                         [RFC4124]
23-249   unassigned
 250     Reserved for Cisco-proprietary extensions     
 251     Reserved for Cisco-proprietary extensions     
252-254  unassigned
 255     Reserved for future expansion

Sub-TLVs for TLV 135
====================

Allocations within this registry require documentation of the use of 
the allocated value and approval by the Designated Expert assigned
by the IESG.

Type     Description                                   Reference
----     -------------------------                     ---------
0-255    unassigned

Sub-TLVs for TLV 242 
====================

Allocations within this registry require documentation of the use of 
the allocated value and approval by the Designated Expert assigned
by the IESG.

Value    Description                     References
-----    ------------------------------  ----------
   3     TE-MESH-GROUP TLV (IPv4)        [RFC-ietf-ccamp-automesh-04.txt]
   4     TE-MESH-GROUP TLV (IPv6)        [RFC-ietf-ccamp-automesh-04.txt]


References
----------
[RFC1195]  R. Callon, "Use of OSI IS-IS for Routing in TCP/IP 
           and Dual Environments", RFC 1195, December 1990.

[RFC2763]  N. Shen and H. Smit, "Dynamic Hostname Exchange 
           Mechanism for IS-IS, RFC 2763, February 2000.

[RFC3358]   T. Przygienda, "Optional Checksums in Intermediate 
            System to Intermediate System (ISIS)", RFC 3358,
            August 2002.

[RFC3359]  T. Przygienda, "Reserved Type, Length and Value (TLV) 
           Codepoints in Intermediate System to Intermediate System",
           RFC 3359, August 2002.

[RFC3373]  D. Katz and R. Saluja, "Three-Way Handshake for Intermediate 
           System to Intermediate System (IS-IS) Point-to-Point 
           Adjacencies", RFC 3373, September 2002.

[RFC3563]  A. Zinin, "Draft of agreement between ISOC/IETF and 
           ISO/IEC JTC1/SC6 on IS-IS protocol development", RFC 3563,
           July 2003.

[RFC3784]  H. Smit, T. Li, "IS-IS extensions for Traffic Engineering",
           RFC 3784, June 2004.

[RFC3847]  M. Shand, L. Ginsberg, "Restart signaling for IS-IS", RFC 3847,
           July 2004.

[RFC4124]  Le Faucheur, F., Ed., "Protocol extensions for support of  
           Differentiated-Service-aware MPLS Traffic Engineering", 
           RFC 4124, June 2005.

[RFC4205]  K. Kompella,, Y. Rekhter, Eds., "IS-IS Extensions in Support of 
           Generalized Multi-Protocol Label Switching", RFC 4205, October 2005.

[RFC-ietf-isis-caps-07.txt]
           J. Vasseur, N. Shen, R. Aggarwal, "IS-IS Extensions for 
           Advertising Router Information", RFC XXXX, Month, Year.

[RFC-ietf-ccamp-automesh-04.txt]
           JP. Vasseur, Ed., JL. Leroux, Ed., S. Yasukawa, S. Previdi, P. Psenak
           and P. Mabbey, "Routing extensions for discovery of Multiprotocol (MPLS) 
           Label Switch Router (LSR) Traffic Engineering (TE) mesh membership",
           RFC XXXX, Month Year.


(created 06 May 2003)

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