Redirect to another virtual server

YOu must create a virtual server for 172.16.2.74 Port 80.

On this virtual server, you have an irule like this for example

when HTTP_REQUEST {
   virtual VS1
}

Assuming that the virtual you want is called VS1 and they are all in the same administrative partition.

To choose either VS1 or VS2, you will need perhaps an if Condition that makes a decision which of the VS to send the traffic to.

Also, you can simplify your configuration greatly by simply attaching the pool directly on the Virtual for 172.16.2.74 port 80. The pool member ports do not have to be the same as the virtual server port. LTM will transparently translate the port when it sends the traffic to the pool member.

YOu must create a virtual server for 172.16.2.74 Port 80.

On this virtual server, you have an irule like this for example

when HTTP_REQUEST {
   virtual VS1
}

Assuming that the virtual you want is called VS1 and they are all in the same administrative partition.

To choose either VS1 or VS2, you will need perhaps an if Condition that makes a decision which of the VS to send the traffic to.

Also, you can simplify your configuration greatly by simply attaching the pool directly on the Virtual for 172.16.2.74 port 80. The pool member ports do not have to be the same as the virtual server port. LTM will transparently translate the port when it sends the traffic to the pool member.

Irules Introduction is here. Chapter 2 covers if conditions:

https://devcentral.f5.com/articles/irules-101-01-introduction-to-irules