Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Melinda_60516's avatar
Melinda_60516
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Jun 05, 2015

how to setup persistence to concatenate jvmRoute with JSESSIONID to generate final SESSIONID

Hi, Can anyone help with how to setup persistence for a request as below:   We are going to be setting a "jvmRoute" variable in tomcat, and need to configure the F5 load balancer to concatenate it...
riyer_206339's avatar
riyer_206339
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Mar 09, 2017

Hi All,

We have similar requirement i.e. to persist at BIG-IP level in this pattern "JSESSIONID.jvmRoute". I would like to know if this iRule below would help us in achieving that goal. 

when HTTP_RESPONSE {
  if { [HTTP::cookie exists "JSESSIONID"] } {
   persist add uie [HTTP::cookie "JSESSIONID"][HTTP::cookie "jvmRoute"]
  }
}

when HTTP_REQUEST {
  if { [HTTP::cookie exists "JSESSIONID"] } {
    persist uie [HTTP::cookie "JSESSIONID"][HTTP::cookie "jvmRoute"]
  }
}

Regards, Ram

sirwinston's avatar
sirwinston
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Mar 09, 2017

Hi Ram,

 

As I indicated Tomcat appends the jvmRoute to the JSESSIONID. Tomcat does not set a separate jvmRoute cookie so [HTTP::cookie "jvmRoute"] will always return an empty string.

 

Bottom line is that the standard JSESSIONID irule should work fine.

 

Rgds,

 

W.