For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

eden191456's avatar
eden191456
Icon for Nimbostratus rankNimbostratus
Aug 06, 2019

Retrying a different application server after receiving error 503

We use F5 Big-IP load-balancer (LB) with 2 application servers, A1 and A2. When sending 10 requests to the LB, 5 of them are being sent to A1, and 5 to A2. However, if 10 request are sent while A1 ...
application delivery
BIG-IP
jonwest1_uk's avatar
jonwest1_uk
Icon for Cirrus rankCirrus
Aug 06, 2019

You need an http monitor looking for 200 as response. When the Application server returns 503 to the BigIP, the BigIP will mark this server as down and send any subsequent requests to the other server. The interval of the monitor is important here as the 10 requests may be sent before the BigIP has a chance to mark it down.