Morning, all - Currently bringing a second datacenter site online, and looking for some input for the failover design.
The plan is to have a DIA from Carrier 1 at Site A, and a DIA from Carrier 2 at Site B. Between the two sites is an MPLS circuit connecting our internal networks.
We would like to be able to lose either carrier (at either site), at failover to the other site's internet connection, while retaining the same public facing IP's.
Here are my questions - 1) Is an iBGP connection the best way to facilitate failover between the two BGP routers (one at each site)? 2) Is there any hope of using the limited BGP functionality on a Barracuda firewall for this? Or will we certainly need to purchase dedicated routers for BGP? 3) Since we're spanning across two carriers, we will need to get our own IP address space, independent from the carriers, in addition to an ASN - correct? 4) Is there a way to do this without using an entire /24? I know advertisements for smaller spaces are often rejected, and I don't think we'll be able to aggregate under an ISP as we are using two different carriers.
If it appears I'm overlooking anything, please let me know.
Thanks in advance for the input.
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