Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
10.2.1, 11.4.0, 11.4.1
Fixed In:
11.5.0, 11.4.1 HF6, 11.4.0 HF6
Opened: May 08, 2013 Severity: 2-Critical Related Article:
K14752
Occasionally, the standby system crashes in a configuration containing a forwarding virtual server with a wildcard IP address and port, with connection mirroring enabled.
When the crash occurs, the standby system posts the following assert: 'tmm failed assertion, non-zero ha_unit required for mirrored flow' and crashes.
This occurs in version 11.4.0 on an active-standby setup in which there is a L4 forwarding virtual server or SNAT listener configuration with a wildcard IP address and port, and with connection mirroring enabled.
To work around this issue, you can eliminate routing issues on the network by disabling mirroring on the affected virtual server. For more information, see SOL14752: The TMM daemon on the standby device may unexpectedly restart when receiving mirrored connections, available at https://support.f5.com/kb/en-us/solutions/public/14000/700/sol14752.html.
The standby system no longer crashes in a configuration containing a forwarding virtual server with a wildcard IP address and port, with connection mirroring enabled.