Hello, I am using check_snmp_plugin to monitor a couple of switches. The command template I use is: $USER1$/check_snmp_int.pl -H $HOSTADDRESS$ -C $USER5$ -2 -r -n $ARG1$ -fY -kqB -g -w $ARG2$ -c $ARG3$ -d $ARG4$ And the particular one for a certain port/device is: # Monitor bandwidth and port status - port 23 define service{ use generic-service ; Inherit values from a template Host_name switch1 Service_description Port 23. Check_command check_snmp_int!"GigabitEthernet0/23"!600000,600000,100,100,100000,10!800000,800000,200,200,200000,20!11 Normal_check_interval 2 ; Check the service every 2 units under normal conditions retry_check_interval<-->1 ; Re-check the service every one unit until its final/hard state is determined } The interval length in nagios.cfg is set to: interval_length=10 Can you please let me know a good value for the -d parameter in order to tweak the check_snmp_int.pl script properly? Thank you!