2010/12/9 b2 <b2@playtime.bg>:
Hi , first sorry for lame question but i'm new to BGP. In my ISP I have two full BGP sessions with my two transit providers (X and Y), and for every provider i have assigned PA (Provider Aggregatable) networks. Is it possible (if there are no filters on other side) to advertise X networks to Y and Y to accept them ? My confusion comes from the PA status , i know if it is PI there are no problem to route it to any AS.
Generally speaking, you need at least a /24 from one or the other of them, you need a letter of authorization (LOA) from the one that provided the /24 permitting you to announce it to other ISP(s) and you'll need to test to make sure the ISP who assigned the /24 has set up their filters properly so that you can communicate with them over the Internet even when your line to them is down. For your first foray in to BGP, I strongly advise you to contract an expert for help both programming your router and interacting with your ISPs. Regards, Bill Herrin -- William D. Herrin ................ herrin@dirtside.com bill@herrin.us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004