Add Ip member pool in my header browser

If you want to insert text in the response content, you could use a stream profile and iRule to configure it. You can use this rule by adding a blank stream profile to the VIP and a custom HTTP profile with Response Chunking set to Rechunk.

 
 when HTTP_RESPONSE { 
  
     Check if response type is text 
    if {[HTTP::header value Content-Type] contains "text"}{ 
  
        Replace  with 1.1.1.1 where 1.1.1.1 is the server IP adddress 
       STREAM::expression "@<\[Tt\]\[Ii\]\[Tt\]\[Ll\]\[Ee\]>@[IP::server_addr] - @" 
  
        Enable the stream filter for this response only 
       STREAM::enable 
  
    } else { 
  
        Response wasn't text, so disable the stream filter 
       STREAM::disable       
    } 
 } 
 when STREAM_MATCHED { 
  
      This event can is for debug only and can be removed once testing is complete 
     log local0. "Matched: [STREAM::match]" 
 } 
 

I'd guess the TCL error with the payload replace is occurring when the response size is over 1Mib and the collection is being limited to just a portion of the response payload.

Aaron