the phone-home by APs to trace.svc.ui.com, introduced in a recent firmware release

temp solution

set system static-host-mapping host-name trace.svc.ui.com inet 127.0.0.1 
set system static-host-mapping host-name trace.svc.ui.com inet '::1'

beware:


the retry cycle is every 25s and for certain firmware revisions there's a memory leak at each one