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

Last Modified: Nov 07, 2022

Affected Product(s):
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,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6

Fixed In:

Opened: Oct 17, 2016

Severity: 3-Major


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




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


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


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips