ISP Load Balancing, SNAT pool instead of Automap link self-ip, anyway to do health check ?

It seems like you're experiencing intermittent internet access issues because F5 is selecting SNAT IPs from a pool that includes downed DIA links. To resolve this, you can configure F5 to dynamically select SNAT pool IPs based on the health check status of the default_gateway_pool. You can achieve this by using an iRule to ensure SNAT pool IP selection aligns with the health status of the gateway pool members. This approach will help avoid the issue of F5 picking SNAT IPs from downed links, ensuring more stable internet access.