BIGIP LTM Loadbalancing for Cache Farm with Client IP Spoofing feature.

 
  Change "myPool" to your pool name. 
  Replace IPADDR1, IPPADDR2, IPADDRN with the node IPs contained in "myPool" 
  Replace  with the port number of the nodes contained within "myPool" 
  
 when HTTP_REQUEST {  
 set GOOD_NODES {} 
 set High_Score -9999999999 
 set Node_Picked “” 
 set Pool_Picked pool_[expr {crc32 [HTTP::uri]} % 10]  
 set NS {IPADDR1 IPADDR2 IPADDRN } 
 set portnum  
    This looks through myPool nodes to determine the one's that are active 
    and passes it onto the array called GOOD_NODES 
   foreach N $NS { 
         if { [LB::status pool  $N $portnum] eq "up" } { 
            lappend GOOD_NODES $N 
         }       
    } 
  
 foreach Cur_Node $GOOD_NODES { 
     if { [crc32 $Cur_Node[HTTP::uri]] > $High_Score } { 
     set High_Score [crc32 $Cur_Node[HTTP::uri]] 
     set Node_Picked $Cur_Node 
     } 
  } 
  pool $Pool_Picked member [lindex $Node_Picked 0] [lindex $Node_Picked 1] 
 }