I am using quagga and FreeBSD boxes to achieve this: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13762-40.html#conf3. Only change is that upstream provider is sending full bgp instead of the default route.
I have everything set up and working moreless correctly. However, I am having issues with few things:
when connection between R101 and R103 goes down, R101 doesn't send traffic over R102-R104 link. This is because, R101 doesn't have any routes R102 besides the one I am advertising. How should I can configure quagga to redistribute routes obtained via external peer over internal BGP session?
For advertising my networks, Quagga works until the moment I restart R101. Once, R!01 comes back and internal BGP session is re-established, R102 stops advertising anything to R101, but advertises to R104. Is this normal? After I restart quagga on R102, the advertising to R101 works correctly.
Quagga config from R101:
R102 full config: