Last Modified: Jul 28, 2026
Affected Product(s):
BIG-IP TMOS
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, 17.1.3, 17.1.3.1, 17.1.3.2, 17.1.3.4, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6, 17.5.1.8, 21.1.0, 21.1.0.1
Opened: May 07, 2026 Severity: 3-Major
HA ConfigSync enters a permanently disconnected state. Error present in the logs: May 7 14:36:35 err mcpd[7116]: 0107142f:3: Can't connect to CMI peer 10.64.245.129, TMM outbound listener not yet created
Config changes on the active unit are not synced to the standby
Any of the following: - A config sync address is changed to some other address - Self-IP used previously by config-sync is modified - A MCPD crash followed by a license install
A `bigstart restart tmm` on the Active unit fixes the issue. Note - restarting tmm will impact all traffic processing on the unit
None