Monitor one requires that SNMP be available and configured to display traffic information. In order of simplest to most complex, here is a list of reasons that Monitor one might not get SNMP information from a device:
- Wrong DNS name/IP address (not likely, but we have to mention it).
- No connectivity. Can you ping the device from the Monitor one station?
- No SNMP agent on the device. Many devices or computers have optional SNMP capabilities that must be installed separately.
- In a custom Shooter, have you specified the OID and Instance properly?
- Wrong Community string (have you tried 'public' ?)
- Access lists: does the equipment only allow SNMP access from certain addresses?
- Firewalls: does a firewall block the SNMP port between your Mac and the equipment?
- Bugs in the SNMP agent on the equipment. Monitor one uses SNMP Get-Next-Requests in several places. We've seen certain equipment that fails when queried this way.