I have 2 BGP links at my gateway router.
Link A is 10 Mb bandwidth and receive full internet routing table from ISP A. Meanwhile link B is 20Mb bandwidth and receive summarize routing table from ISP B. I want to make Link B as primary and have configured higher local preference for Link B.
The problem is, most of the packet go to Link A because it has specific prefix due to internet full routing table.
Is there a way to tweak this?
I have ask ISP B to give full routing table but they are not cooperating.
I also try to ask ISP A to give only summarize routes but they are not cooperating also.
I'm thinking to filter the full routing table from ISP A, so that it just include the network prefix from ISP A with default route. So most of the packet will go through link B because it has higher local preference. Can you show me how to do this?
Would it affect the router performance?
For your info, my gateway router is Cat 6509.