Sunday, October 6, 2019

Specifying a route over BGP WAN

I have the following (simplified) network.

Image

  • Routers A, B, C, and Firewalls H and I represent different sites. H and I should have been represented with router icons.
  • The pink box represents the WAN.

Questions

  1. Theoretically, is it possible for Site A to reach the internet through the specified green route (A>D>F>H>Internet)? It may not be the best route based on BGP's decision making process, but that is what I want. If so, how? Tunneling? Static routes?
  2. If the above is possible, then theoretically, one would be able to configure a specific failover path as shown in orange, correct?
  3. Similarly, can I define the green path, for Site A, as a default route, and Firewall H, as a default gateway for site A?

Assume my WAN provider will work with me to make this possible. Is this theoretically and technically possible?



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