Using BGP between two Internet Service Providers for internet redundancy
I understand that for BGP, I need to purchase an AS number and a minimum of a class C subnet. This is fine, I know it won't be a problem, but here's my question. Right now I only have one internet circuit, (I'm not doing BGP with them right now, but they can do it). We are bringing in a 2nd ISP who can also do BGP so we will have internet redundancy. My question is do I need a class C subnet from both ISP's? With the ISP I currently have I have a /30 WAN connection, and a /28 public routable IP Block. Any assistance would be greatly appreciated. Thanks. .
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Leeeee
Rauenpc is correct regarding advertising PA address space to another ISP. It's possible, but not as cut and dry as obtaining AS/block from ARIN.
ASKER
Thanks.
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A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.
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