RE: FW: [LinkSec] updated handoff presentation
Paul,
Some reasons I can think of right now.
1) Semantics. EAPoL is just as its name suggests, a transport for EAP,
not a network discovery component. Mixing the semantics of protocols can
lead to unintended consequences.
2) Scheduling. Limiting detection time to a particular point in the EAP
or EAPoL message sequence will run counter to the goal of making
detection swift and lightweight that serves the needs of wireless
devices seeking low power operation and low duration handoffs.
3) MTUs. Individual frames have limitations on size. The scope of
handoff and network discovery related information is potentially large.
A standalone disovery protocol could address the proper encapsulation of
this in a straightforward way.
4) Overlap with EAP. EAP is looking to add this feature into the
semantics of the request-identity data field and this is arguably the
better place to do that sort of thing.
5) Pragmatic. There is a motivated handoff group chomping at the bit to
write this spec. Doing it in 802.1aa would introduce interdependencies
with all the other 802.1aa work going on.
LLDP is one of those mystery specs. I've never read it and don't know if
it's a good thing or not. My reading list is getting longer.
DJ
David Johnston
Intel Corporation
Chair, IEEE 802 Handoff ECSG
Email : dj.johnston@intel.com
Tel : 503 380 5578 (Mobile)
Tel : 503 264 3855 (Office)
> -----Original Message-----
> From: CONGDON,PAUL (HP-Roseville,ex1) [mailto:paul.congdon@hp.com]
> Sent: Thursday, August 28, 2003 10:28 AM
> To: 'Bernard Aboba'; CONGDON,PAUL (HP-Roseville,ex1);
> mick_seaman@ieee.org; stds-802-linksec@ieee.org
> Subject: RE: FW: [LinkSec] updated handoff presentation
>
>
>
>
> Since 802.1X is designed for all 802 media, why not extend it
> to incorporate
> the necessary discovery component? We've been talking about
> a symmetric
> EAPOL-Hello frame for some time. Perhaps it could have both
> advertisement
> and an query/response semantics. Alternatively, we could
> revisit the LLDP
> discussion - Mick may have some opinions on that...
>
> Paul
>
> > -----Original Message-----
> > From: Bernard Aboba [mailto:bernard_aboba@hotmail.com]
> > Sent: Wednesday, August 27, 2003 5:27 PM
> > To: paul.congdon@hp.com; mick_seaman@ieee.org;
> > stds-802-linksec@ieee.org
> > Subject: RE: FW: [LinkSec] updated handoff presentation
> >
> >
> > >Of course, we could open the LLDP issue again, but that would be
> > >beating a dead horse. Some people like to do that.
> >
> > I agree that beating the LLDP horse would not get us where we
> > need to go.
> > However, I'd also argue that Discovery functionality, if it
> > is general
> > enough to handle all IEEE 802 media, would also probably be
> > general enough
> > to encompass LLDP as a special case.
> >
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>