Were all 3 boards showing the red LED on when it was having problems? If you want to rule out the IP issue, which I doubt it is, you can assign the antminer a static IP address.
Did you have a back-up pool assigned or only one pool? I wouldn't know what happens if the only pool on the list goes down, but if you dont have a backup, i would suggest a safe fall-back like slushpool or viabtc just in case.
Honestly I'm not sure if all 3 boards were lit. No I dont have a backup pool assigned. I am mining at BTC.COM . I guess I didnt realize the pool could go down and I would need a backup. If I add a second pool then it will only mine that pool if pool 1 goes down and only until pool 1 comes back online?