RE: Unnumbered support with ISIS - using exiting TLV

["Naidu, Venkata" <Venkata.Naidu@Marconi.com>]

Yakov:

-> To support unnumbered links the current GMPLS ISIS routing spec
-> defines new TLV, Link Identifier, to be carried in ISIS Hellos. It
-> was pointed out that ISIS already has an existing mechanism to
-> exchange link identifiers - see draft-ietf-isis-3way-05.txt. So,
-> unless there are specific technical objections, I would suggest we
-> replace Link Identifier TLV with the mechanism described in
-> draft-ietf-isis-3way-05.txt

  AFAIK, ISIS 3-Way handshake is optional and It is fully
  interoperable with systems that do not support the extension.
  I think we are making a dependency here - ISIS Unnumbered extensions
 (for (G)MPLS-TE purpose and not for normal hop-by-hop routing)  
  will be supported only with 3-way handshake extensions. If that 
  is not a big problem, I completely agree with your proposal.

Venkata.