Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 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
Fixed In:
11.6.0
Opened: Apr 14, 2014 Severity: 3-Major Related Article:
K15469
After loading the configuration (e.g. "tmsh load sys config"), network virtual-servers which should have ICMP-echo disabled may incorrectly have it enabled.
IP addresses which are actually offline / non-existent may start responding to "ping". This confounds troubleshooting, and may adversely affect devices which have ICMP monitors configured.
Network virtual servers configured
Change icmp-echo value back to disabled after load
Configuration loads correct virtual-address icmp-echo values