North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: routing between provider edge and CPE routers
My recommendation would be for you to: o redistribute directly connected interfaces via a strict filter into BGP and use iBGP to carry it around the local AS or o use passive interfaces in IGPs to do the same Avoid having to run a topology computation everytime a T1/56k links drops. I prefer the first option to the second based on experience UUNET / Global Crossing has w/ option #1. - Serge Thus spake Mike Bernico ([email protected]): > > > 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. > > If you do use an IGP, have you had any of the scalability issues we have > had? How did you fix them? > > If you use statics/BGP to CPE routers have you had any issues doing > that? In particular I'm wondering about the thousands of lines of > configuration used to make static routes work. > > > Thanks in advance for your advice. > > Mike Bernico
|