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ISP/Route redundancy with HA setup
On your two routers setup a FHRP like HSRP or VRRP.
Setup a track statement for reachablitilty on the route 0.0.0.0/0 received via BGP. On the FHRP set a decrement of 20 based on when that track statement is down.
Static route the F5 to the VIP that you assigned for the FHRP and it will always follow who is the active router.
This shouldn't trigger the F5 to failover - but it will make sure your traffic goes to the correct router.
The other solution would be to setup iBGP peers between your routers so they always share a default route. Would need to use a route-map to make sure you prefer a specific ISP.
Thanks for the advice, our setups are going to be geo-resilient so it makes FHRP difficult on the Routers. We will also have a BGP enabled F/W's between the routers and BIG-IPs.
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