https://help.ui.com/hc/en-us/articles/204975904-EdgeRouter-Remote-Syslog-Server-for-System-Logs
Sometimes you want to log remotely and sometimes the amount of local logging taking place is overwhelming your little ERX or ERLite.
To Log to a Remote Host
set system syslog host 172.21.21.148 facility all level info
This will send all logs to the IP provided at the level just below debug
To Minimize Local Logging
You'd do this if you have remote logging enabled already and want to reduce the amount of work your router has to do by keeping a local copy of the logs as well…
set system syslog global facility protocols level emerg set system syslog global facility all level emerg