how to use data group

Do you really have clients making requests using several different IP addresses to the same host VIP? Or do you have this iRule applied to multiple host VIPs? Or are you using a 0.0.0.0:80 VIP?

If you add logs to the iRule, can you see what's being hit when you're testing? What does a client see when a failure occurs?

Also, which LTM version are you running? For 10.x, you can use the class command to get a bit more functionality for doing lookups against a datagroup. In 10.1.x, you have even more functionality with address type datagroups that you use.

Aaron

 
 when HTTP_REQUEST { 
  
    log local0. "[IP::client_addr]:[TCP::client_port]: [HTTP::method] request to [HTTP::host][HTTP::uri]" 
  
    find a match using host+uri against the class and 
    returns the whole string (field1 field2 field3)then 
    set it as newURI variable. 
    set newURI "[findclass [[HTTP::host][HTTP::uri]] $::redlist]" 
    if { $newURI ne "" } { 
  
       log local0. "[IP::client_addr]:[TCP::client_port]: Matched line $newURI" 
  
        Parse the three fields in the matched datagroup line 
       scan $newuri {%s %s %s} unused host uri 
  
       log local0. "Parsed: $unused $host $uri" 
  
       change host and uri 
       if {$host ne ""}{ 
          HTTP::host $host 
       } 
       if {$uri ne ""}{ 
          HTTP::uri $uri 
       } 
    } 
 }