I am posting this as part of an old posting on this issue but in a different context. I didn't get response from old posting and my time is running out! I wanted some expert advise on my decision please. forgive for new posting please.
I am trying to bring up these new network, with two border router using BGP to two different providers and want to have redundancy and Load sharing.
the last time I brough it up, the network collapsed due to a hardware failure (SUP 720 went bad) but what I noticed during a few hours of operation was that, i was dending traffic out the Abovenet connection (the router that went bad) and no traffic was going out the other router although I was advertising and the bGP session was up with no problems! I am sure that the redundancy was there but no load sharing.
i the BGP config i have posted here, I did include one /20 block on one router but didn't include it on the other one, the other three bocks as on both. /19 and 20 on one, and /19 and 20 on the other. so the block that has not been advertised on both and only on one has to flow out or th etraffic from that block has to flow out the other router but if that router goes down, that block won't flow out any more and need to be added manually to the other one.
Now, I am trying to fine a way for both the redundancy and load sharing without having to deal with this problem?
I have seen many documents and books but none seem to be fitting my scenario or I may not be able to find a fit or choose from all the different types of advertising and filtering!!?
I really appreciate if you guys can help me out here please.
The files are attached.