Description

On EX4100 or EX4400 series switch, you may observe error message 'COS default: IEEE 802.1ad defaults not specified' upon commit operation. This is a harmless message which you can ignore safely but software fix has been implemented through PR1771111 to avoid generating message.

Symptoms

On EX4100 or EX4400 series switch, error message below would be generated when changing unrelated configuration. 
Oct 29 12:14:31.712 2023 Switch cosd[33815]: %DAEMON-3: COS default: IEEE 802.1ad defaults not specified
Oct 29 12:14:35.118 2023 Switch cosd[19684]: %DAEMON-3: COS default: IEEE 802.1ad defaults not specified
For example, message could be seen when deleting or adding loopback interface which doesn't have any QoS setting.

Solution

This message is seen when one of QoS daemons tries to initialize IEEE802.1ad Classifiers but failed because EX4100 and EX4400 do not support it.
You can ignore this message safely and software fix has been implemented not to initialize it.
For the details of the PR, please refer to link below.
https://prsearch.juniper.net/problemreport/PR1771111 ​​​​​​​

Modification History

2023-12-07 : Article Created