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

Forum Discussion

sthorns's avatar
sthorns
Icon for Nimbostratus rankNimbostratus
8 years ago

Cookie Persistence and Internet Explorer Not Working

Hi all,   I have a strange issue with our F5 Load Balancer deployment. The issue we are having is with Cookie Persistence types, we are unable to get the F5 or end server to correctly set and save...
application delivery
internet explorer
LTM
persistence
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
8 years ago

Hi sthorns,

LTM's Cookie Persistence Profile issues a "Session Cookie". Because of that, IE won't save it physically to your disk and you can't check its presence via IE's Temporary Internet Files.

While tracing the HTTP requests (e.g. via Fiddler, HTTPWatch or even IE's build-in F12-Network Profiler) make sure your LTM inserts a 

Set-Cookie: BIGipServer${YourPoolName}=Value; Some Params
header for the LB cookie. And that the client presents the 
BIGipServer${YourPoolName}=Value
cookie on subsequent request.

Cheers, Kai