I need some assistance... I currently have two upstream connections at 100MB with a full BGP feed each into Mikrotik x86 routers wich are also running OSPF facing internally - no routes are distributed from BGP to OSPF. The two BGP routers are located in two different cities and do not share BGP information between themselves - they are basically used to advertise out the networks to control the flow of traffic coming into our network. Same upstream provider so they would have the same outgoing tables anyway. We use OSPF path costs to direct outgoing traffic to the closest BGO router and basically the networks advertised follow the same paths in as out. The /21s are advertised on both BGP routers with the /24s advertised to steer the inbound traffic through the same router the outbound traffic goes out.
Ok, that all works textbook style, no problems easy to manage for both OSPF (one internal area) and BGP. Now we need more bandwidth and have reached out to grab another provider with 100MB circuit in another city. This is a different provider than the other two existing BGP routers are peered with and now there is a desire to have the BGP routers on my network exchange routes and select the best outgoing router based on the full BGP routing tables. It's kind of hard to explain without the picture of the network to understand so here is a quick hand-drawn sketch of what the network layout looks like. Sorry its a mess just did it real quick while typing this email.... http://www.brevardwireless.com/files/networkpic.pdf I'm not really worried about router #3 participating in the BGP table exchanges because I will soon consolidate router #2 and #3 into the same router and combine bandwidth feeds into one fiber as well. So for sake of discussion BGP router #3 does not exist, I drew it for completeness of my current situation. I'm guessing I need to upgrade the tower routers on tower C and E to routers powerful enough to handle BGP and I have placed RB1100 on each so they are there. Not interested in hearing about my router selections, just how to configure routing protocols to accomplish my goals (thanks). We have attempted in testbed with 4 BGP routers in a row like they are on the network map with a full feed on each end and we are having a lot of luck. Not sure if our testbed is fouled or it we just need more of a BGP clue. Either way, some assistance would be greatly appreciated. My preference is to not have BGP and OSPF exchange routes. Since the BGP routers traverse the middle of my network I'll let OSPF do its magic of getting to the closest gateway and then let BGP direct it from there. Once a packet hits any BGP router it will not have to cross a non-BGP router before it goes out in all cases. I have considered professional consultation and will need to go there pending no internal progress on reaching our goals. I'd rather ask first and learn myself and be able to manage what I have running without having outside 3rd party reliance. Most of you probably understand that decision :) Any way, if you have read this far and suffered through my network pic then thank you very much. I appreciate your time and assistance. Hopefully this is an easy task for some of you. Scott Carullo Brevard Wireless 321-205-1100 x102
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