Last Modified: Jun 19, 2025
Affected Product(s):
BIG-IP Install/Upgrade, LTM
Known Affected Versions:
17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2
Opened: Nov 02, 2022 Severity: 2-Critical
After upgrading to BIG-IP 17.1.x, the config may fail to load, resulting in the device remaining in an Offline state. The /var/log/ltm file contains messages regarding "Full configuration load failed." and references to either response-chunking or request-chunking setting being invalid in an http profile For example: 01070281:3: Invalid "http response chunking" value for profile /Common/test-http-profile. Invalid entry, check allowed values.
Configuration fails to load, requiring manual intervention
Upgraded from a version prior to 15.0.0, where "chunking preserve" was valid syntax.
Edit /config/bigip.conf (and any partition bigip.conf files under /config/partitions/*/) and either: A. Update any instances of "response-chunking preserve" to be "response-chunking sustain" (or) B. Carefully edit the #TMSH-VERSION: line at the very top of the file, and change it from 17.x.x.x to the version of BIG-IP software that the device was previous running (e.g, 14.1.4.6), and then load the config again (tmsh load sys config)
None