Last Modified: Oct 15, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.5.1, 17.5.1.2, 17.5.1.3
Opened: Oct 02, 2025 Severity: 4-Minor
If a performance (fastL4) virtual server is selected it's impossible to configure the client or server side WebSocket profile. After selecting WebSocket profile and clicking update, the configuration is not applied and the profile field displays "None". , this option is available for configuration in the GUI, but once it's pushed (i.e. "Update" button pressed), the config is not applied, and the websocket profile is removed from the select field.
Configuration of WebSocket profiles does not work via GUI.
Performance (fastL4) profile is selected instead of Standard type.
WebSocket profiles can be configured via tmsh: modify ltm virtual http-vs profiles add { websocket }
None