routing between provider edge and CPE routers

Wed Jan 29 19:35:45 UTC 2003

On Wed, 29 Jan 2003, Mike Bernico wrote:

>
>
> Hi,
>
> I apologize if this has been asked before.  I work for an ISP that
> started very small (hundreds of T1 and 56k customers) and has grown very
> large in the last few years (thousands of T1 customers, as well as DS3
> customers and OC3 customers).
>
> We currently use an IGP to route between our distribution routers and
> the CPE routers we manage.  This has historically worked very well. We
> have recently begun running into scalability issues however.  We have
> some distribution routers that have over 1000 T1 interfaces on them.
> This is causing some problems with stability in that edge IGP.  Does any
> other service provider use an IGP all the way to the customer for non
> BGP customers or are we the only one?  I have a feeling we maybe are.

So, if customers bounce your IGP churns away? And customers have access to
your IGP data (provided they break into the CPE, which is trivial, eh?)