asg110 shutting down

Hi:

we have a client that have one asg110 and one software appliance. Yesterday the asg110 shutdown few times. We found this in the log :


2012:06:02-21:19:09 eco-asg ulogd[5489]: SIGHUP received
2012:06:02-21:19:09 eco-asg syslog-ng[4489]: Termination requested via signal, terminating;
2012:06:02-21:19:09 eco-asg syslog-ng[4489]: syslog-ng shutting down; version='3.0.10'
2012:06:02-21:19:10 eco-asg syslog-ng[6087]: syslog-ng starting up; version='3.0.10'
2012:06:02-21:19:19 eco-asg syslog-ng[6087]: Configuration reload request received, reloading configuration;
2012:06:02-21:19:33 eco-asg snmpd[5848]: Received TERM or STOP signal... shutting down...


We turn off the snmp and the asg110 dont shutdown anymore, but we need the snmp service for the monitoring application.

what can be this?