One day while configuring the Juniper MX204, I noticed that the Alarm indicator on the front panel was lit red, and looking at the list of alarms, I found the following:
show system alarms
2 alarms currently active
Alarm time Class Description
2022-09-18 18:52:36 EEST Major Host 0 fxp0 : Ethernet Link Down
2022-09-18 18:51:36 EEST Major Management Ethernet Links Down
Since on this Juniper, the management port did not need to be used, I turned off the alarm if there was no link on it:
configure
set chassis alarm management-ethernet link-down ignore
And applied the config changes:
commit
After the commit command, after about 10 seconds, these alarms disappeared:
run show system alarms
No alarms currently active
See also my article:
Juniper MX204 setup