Bug ID 473724: No emergency alert for unpowered DC PSU hot swap on BIG-IP 10000-/12000-series appliances

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP All(all modules)

Known Affected Versions:
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, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4

Opened: Jul 31, 2014
Severity: 4-Minor

Symptoms

If a DC PSU hotswap is performed on BIG-IP 10000-series or 12000-series appliances, but the PSU is left unpowered, the front panel PSU LED is amber, but no other alerts, LCD messages or LED indications are issued to indicate that the appliance is in a non-redundant PSU state.

Impact

Operators may not be aware that the appliance is left in a non-redundant PSU state after a DC PSU hot-swap. This is expected behavior. FND850 DC PSUs for BIG-IP 10000-series or 12000-series appliances do not indicate their presence to the BIG-IP system until external power is applied.

Conditions

This occurs on BIG-IP 10000-series or 12000-series appliances if a DC PSU is hot-swapped but external power is not applied. FND850 DC PSUs for BIG-IP 10000-series or 12000-series appliances do not indicate their presence to the BIG-IP system until external power is applied. Thus, the presence of an unpowered DC PSU in this case is not detected, and its status is reported as Not Present. By design, no alerts are issued by BIG-IP for non-present PSUs.

Workaround

When hot-swapping DC PSUs on BIG-IP 10000-series or 12000-series appliances, verify the success of the operation by: 1. Verify that the front panel PSU LED for the newly inserted PSU is Green. 2. Verify that the status of the newly inserted PSU is reported as Good by the 'system_check -d' or 'tmsh show sys hardware' utilities.

Fix Information

None

Behavior Change