i am using rsyncd method of backup for one of my server, at the start all is working fine, half of backup at full speed, after that i have some strange messages in rsyncd.log
Service registration expired, refreshing it

Error registering service with slp -20
Error registering service with slp -1073746860

and backup pauses for 10 min env (no network activity) then it continues and finish the backup, all files are backup up, so i dont worry much about it, but is there any way to correct this problem?