I have a BRAS (Terminating several thousand PPPoE sessions), and today I use simple static routes pointing to the bras for customer routes. I want to improve this model and allow for failover and so forth, and I would like instead for my customer routes to be entered into my igp so if they move around, the routes can follow them. I was wondering if iBGP may be sutaible for this task - there will always be a steady stream of route updates as customer connect and disconnect, mostly in the range of /32's and /29's. BGP seems way superior to ospf for this because of it's excellent filtering and other capabilities, but never having done this on a large scale with the potential for updates as I said, I was hoping someone could make a clear case for or against it.
The client routes would not have to be propagated all across my network so updates don't really have to go far; I could certainly summarize these routes easily at a core router 1 hop from my bras for example, with that router(s) knowing the final hop from ibgp. I just want them to be able to float between bras and I can even tolerate a few seconds of route instability (hey, if you want stability then don't keep redialing; nail the pppoe up and leave it up!)
Thank you Oh wizend ones (!),