[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

A question on SA establishment in RFC 2408



 My apology if this question has been raised before.

   Section 4.2 of RFC2408 (the ISAKMP RFC) describes SA establishment,
   in its last paragraph before section 4.2.1, it states :

     ".......The responder
      SHOULD retain the Proposal # field in the Proposal payload and the
      Transform # field in each Transform payload of the selected Proposal.
      ..."

   My question is about the word "SHOULD". This word means the responder
   does not have to retain the proposal and transform numbers. If it does
   not retain the numbers, then what numbers should be used in the
   "proposal number" and "transform number" fields in the proposal and
   transform payloads sent from the responder to the initiator ?

   A related and more fundamental question is that how the initiator
   could determine if the responder retains the numbers or not ?


 Thanks in advance.


 Pau-Chen
Follow-Ups: