Explain receive string and receive disable string?

Panki, may I refer you to the following solution k12818

This should explain how the receive string and receive disable string work and, additionally, work together. Essentially the receive string will be used to mark a pool member Up and the receive disable string is used to mark a pool member down.

Hope this helps,

N

Receive string is for positive health check and disable string is for disabling a server for maintenance purpose.

Details are here:

K12818: Using the Receive Disable String advanced configuration setting https://support.f5.com/csp/article/K12818