Re: [RRG] Tunnel fragmentation/reassembly for RRG map-and-encaps architectures

[Dan Jen <jenster@CS.UCLA.EDU>]

Just a little clarification on the functionality of APT.  See comments
inline.

On Mon, 2008-01-07 at 11:41 -0800, Robert Raszuk wrote:
> Eliot,
> 
> Mapping is sourced by the web page. Neither CE nor PE router. The web 
> page allows to change ETR addresses as you like. ETR addresses 
> modification is not related to the ISP connected to customer site. Such 
> web page would be managed by whoever assigned you the EID for your site.
> 

Actually, mapping information is flooded to all providers via a mapping
distribution protocol.  See our draft for details.

> ISP just provides ETR addresses for the PE-CE link. And you do not need 
> to call anyone .. ISP as long as it operates would still announce his 
> block. PE-CE interface you were using will be cleared once you stop 
> paying for the service. That is normal process not much different from 
> today.
> 

Exactly.  Under APT, when a customer-provider contract terminates, the
provider will withdraw its mappings to the customer's EID prefixes.
Elliot, do you consider this an unacceptable violation of your 'provider
independence' principle?  Perhaps I am misunderstanding your criticism
of APT.

Salutations all,

Dan Jen

> > Robert Raszuk wrote:
> >  >
> >  > [...] Today you are connected to two ISPs. Mapping entry list two ETRs
> >  > for your block either your CE or your ISP PE router. When you need to
> >  > switch one ISP with another all you do is to change the ETR address in
> >  > the mapping database.
> > 
> > Where is the mapping sourced?  If it is in your CE router, then you have
> > rate*state problems when that line flaps (and we have reason to believe
> > it will flap).  If it is in the PE router, I have to call my now former
> > service provider to tell them to stop announcing for me.  That's the
> > provider independence part I want.
> > 
> > Regards,
> > 
> > Eliot
> > 
> 
> 
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