We currently have 2 ISP. I am peered to one using BGP. I would like to have a way if our primary ISP is down that external users can access our outside facing servers with the public block of IP that we have. What type of resources would I need on my router and bandwidth to receive BGP routes from the ISP? Also would I need to BGP peer with my other ISP to make this work? Thank you
In order for the fail over to work from one ISP to another, you need to run BGP with both or static (default) route with both. As for what resources you need, if you are going to be receiving default routes through BGP from both ISPs, you don't need lots of resources. If you are going to be receiving full BGP routes from the providers, than your router needs to have enough memory that can handle close to 600k routes.
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