Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP Install/Upgrade, LTM
Known Affected Versions:
11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 12.0.0, 12.0.0 HF1, 12.0.0 HF2
Fixed In:
12.1.0, 12.0.0 HF3, 11.6.1
Opened: Nov 16, 2015 Severity: 3-Major Related Article:
K91296817
Upgrading results in additional escaping for monitor send/recv strings in /config/bigip.conf. After upgrading the bigip.conf still has the old #TMSH-VERSION header. This is behavior is an intended behavior in 12.1.0, so it is not a bug; the configuration is still loaded in memory properly. The TMSH-VERSION string will be updated the next time a save sys config command is issued.
Monitors send/recv strings contain extra escape characters, for example: \\r, \\n etc. Post upgrade the monitors containing escaped characters will fail.
This occurs only when upgrading BIG-IP software in the following situations: -- From 11.6.0 base version, or from 11.6.0 HF1 through 11.6.0 HF5 (or any engHF built on these versions) to final :11.6.0 HF6 through 11.6.0 HF8 -- From 11.5.3 base version, or from 11.5.3 HF1 or 11.5.3 HF2 (or any engHF for these versions) to 11.5.3 HF2 engHF2 or 11.5.3 HF2 engHF45.
Manually/by script remove the additional escaping within the send/recv strings.
The system no longer appends extra escape characters to monitor send/receive strings after upgrading.