Bug ID 623019: Disabling an interface when DDM is enabled may result in transmit power too low DDM mesages

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1

Fixed In:
13.0.0

Opened: Oct 17, 2016
Severity: 3-Major

Symptoms

messages in /var/log/ltm and their associated SNMP traps: Oct 21 08:22:40 localhost err bcm56xxd[21079]: 012c0017:3: DDM interface:1.1 transmit power too low warning. Transmit power:0.0211 mWatts or Oct 21 08:04:25 localhost err bcm56xxd[19986]: 012c0018:3: DDM interface: 1.1 transmit power too low alarm. Transmit power:0.0206 mWatt

Impact

cosmetic

Conditions

1 - DDM enabled 2 - optics that support DDM 3 - the interface is administratively disabled via tmsh or GUI

Workaround

Ignore DDM messages about transmit power on disabled ports. BIG-IP disables the transmit laser when interfaces are disabled to ensure the link does not come up. Some optics will consider that a DDM transmit power too low error.

Fix Information

None

Behavior Change