BGP Question, Multiple ISPs.
Posted on 2009-04-27
I currently have a single Cisco 3825 doing BGP between 2 vendors. One 10MB Circuit and a 4.5MB bonded T1's.
I am going to be adding a 15MB circuit and dropping the 4.5MB one and adding a second 3825 for the new ISP, and using the existing 3825 for the 10MB.
I think I pretty much have the BGP to the ISP's figured out by using the example I have in the existing 3825, but here is my question.
I am going to be running 2 ASA5510's in Active/Standby, and was going to run OSPF on both 3825's, both announcing the default route with the same cost. That should load-balance my outbound traffic. Inbound traffic would be load-shared from BGP.
I have seen comments around talking about running BGP between the 3825's. Is this needed? What would I gain by doing this? Would I need a 3rd interface in the 3825's?