How to create pool with range of port number eg: 33001-33100

I have requirement to create VIP range 33001-33100 which redirect to back-end server range 33001-33100.

I found below irule which can map with VIP port restriction. But not sure how to create pools.

when CLIENT_ACCEPTED { if {([TCP::local_port] >= 33001 ) && ([TCP::local_port] <= 33100) { pool Pool_name ===> } else reject }