Last Modified: Jun 10, 2026
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6, 21.0.0, 21.0.0.1
Opened: Apr 22, 2026 Severity: 3-Major
On VELOS tenants, when you reboot or restart the tenant, the cluster fails to come up fully with some TMMs indicating tmm-not-ready state, and performance is degraded as it fails to bring up the full cluster
Performance degraded due to reduced cluster size
VELOS tenants, with scenarios leading to reboot or restart of the tenant, possibly triggered by - some software upgrade - some power reset or - configuration change causes occasional problems in tmm cluster bring-up and reduces the capacity handled by the tenant When the problem happens, it is observed that - tmctl tmm/cmp shows queue_drops - tmctl tmm/mpi_mem shows tx-full Due to a lot of internal background traffic in the cluster and tmctl tmm/ready_for_world_stat indicates "not read" state for "dag_transition"
No Workaround As it is an intermittent problem, reboot/restart the problematic tenant may help to recover
None