Forum Discussion
Another option would be putting an iRule on your Virtual Server that checks for "active_members" and if none are available it will redirect them to a Friendly Page?
I ask because you could then apply individual connection limits to your servers (once all of the servers in the pool have reached their connection limit they are considered "unavailable" which would then trigger your "active_members" iRule).
Setting a connection limit on the Virtual Sever would not have the same behavior:
SOL9812: Overview of BIG-IP TCP RST behavior
When a virtual server connection limit is configured, and the maximum number of concurrent connections is exceeded for the virtual server, the BIG-IP sends a TCP RST packet in response to connection attempts. The TCP RST packet is sent on the client side of the connection, and the source IP address of the reset is the relevant virtual server IP address.
Its always nice to have options.