eap Mailing List: Re: Ordered delivery of EAP messages

[Pasi.Eronen (Pasi.Eronen]

Glen Zorn wrote:

> My question is, since EAP is also a lockstep protocol, under what
> conditions could EAP messages be delivered out of order, regardless
> of lower layer behavior WRT in-order delivery?

This was discussed as part of issue 188 a very long time ago :)
Back then (October 2003), I wrote:

  Lower layer ordering guarantees are needed because the Identifier
  field is not required to be ordered. If messages can be reordered,
  the peer can't necessarily distinguish a new EAP Request from a
  reordered retransmission of an old request.

  See http://www.ietf.org/internet-drafts/draft-ietf-pana-pana-02.txt, 
  Appendix A for a concrete example. 

Best regards,
Pasi