RE: [dhcwg] Discussion of dhc WG rechartering for DHCP authentication

["Alper Yegin" <alper.yegin at yegin.org>]

Hi Pavan,

> >> 1. PANA needs considerable re-work like PANA snooping on DSLAM to
> install
> >> L2 filters,
> 
> >How is setting up a different filter on the devices that already know how
> to
> >setup filters considered a "considerable re-work"? I'd appreciate if you
> can
> >tell us how this is anything more than simply setting up a filter rule.
> 
> I was talking about introducing another element in DSLAMs to apply filters
> (IP/MAC) based on PANA in addition to what it does by doing DHCP snooping.
> I am not saying that it is not doable. I am just saying that it is an
> additional work whereas there is no change required in case of DHCP based
> solution.

"Additional work" seems a fair statement, not the "considerable re-work"
that you used before.

> 
> >> and PANA support on RG,BNG
> 
> >I hope you are aware that what appears like saving PANA implementation on
> RG
> >and BNG are in fact coming back in the form of DHCP growing PANA from
> within
> >-- with all the problems associated with that unfortunate merger.
> 
> >> and also a tweak in the way DHCP
> >> functions.
> 
> >Please explain this one. I'm not sure what you are referring to.
> 
> After receiving DHCP offer, the client takes the offered IP address and
> PAA address and initiate PANA (instead of doing traditional Request/Ack
> process and then make use of the IP address). This is one tweak. And then
> based on PANA result you restart the DHCP Discover process and take the
> other IP address. So, isnt there a change in the way DHCP is done?

I guess you are considering a call flow where a temporary IP address is
assigned using DHCP, instead of configuring a link-local IP address. OK,
even in that case, I don't see why you stop short of completing the full
DHCP for pre-PANA address. 

You can either do:

1. CPE configures a link-local address
2. CPE discovers PAA (via DHCP or some other mechanism)
3. CPE runs PANA
4. CPE configures "session IP address" using DHCP

Or,

1. CPE configures a pre-PANA IP address using DHCP
2. CPE runs PANA
3. CPE configures "session IP address" using DHCP


I cannot think of why you'd need a tweak for DHCP.

Alper


> 
> Thanks.
> 
> Alper
> 
> 
> 
> 
> 
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