Advertise to both ISPs our internal network of 10.10.10.1, making sure clients on the Internet prefer ISP1 (AS 111) to reach this network. Limit the learned routes from each ISP to default route only. Task: Configure 2 BGP peerings with different providers, each ISP advertising to us (FG3, AS 1680) both, default and Internet routes. Remotely Triggered Black Hole Routing configurationīGP with two ISPs for multi-homing, each advertising default gateway and full routing table Set up BGP peering between FG3 and FG1 using loopback in FG3 Make sure we can see received routing advertisements before and after any filtering is applied.
Secure BGP session between ISP1 and FG3 with one way hash. Limit announced connected routes to 3.3.3.3 only. Uses route-map, aspath-listįorce FG1 to advertise default route without having one in RIB and without using blackhole routing. Prevent our Fortigate from becoming a transit AS, do not advertise learned via eBGP routes. PDF version of this post: Fortigate BGP cookbook of example configuration and debug commands.pdf"īGP with two ISPs for multi-homing, each advertising default gateway and full routing table.
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