Last Modified: May 05, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.1.3.2, 17.5.1.4, 17.5.1.5, 17.5.1.6
Opened: May 01, 2026 Severity: 3-Major
Traffic does not flow through the split-session BigIPs, with the split-session server profile resetting the connection. If the sys db variable tm.rstcause.log is enabled, the BigIP with the splitsession server profile will have "Failed to find sync data" as the cause logged in /var/log/ltm
Connections fail for the virtual until the proxy flow between the two BigIPs dies and is reestablished.
Two BigIPs are configured where one has a virtual using a splitsession client profile and the other has a virtual that uses the peer splitsession server profile.
It is possible to workaround this by disabling SSL for the split-session proxy. For the BigIP with the splitsession client profile, disabling Mode on the splitsession-default-serverssl profile, and for the BigIP with the splitsession server profiledisabling Mode on the splitsession-default-clientssl profile. Note, this would mean the flow metadata would no longer be encrypted between the BigIPs.
None