I'm looking into network management systems. I installed OpenNMS and played around with it. A little too much command line, and scripting for me. I'm not very experienced with Linux. Now I have Dell OpenManage NMS installed (most of our equipment is Dell). Also seems pretty complex. I'm just now getting into using SNMP. Running into a lot of difficulties.
1. At what size network do you usually start to need a NMS? I don't want to get into managing something like this is it's going to be more work than it's worth.
2. What do I need to do to have a basic setup? I have the NMS monitoring one of my switches with snmpv1, public, read/write. I'm not sure what info i'm supposed to get with that. CPU / Memory utilization? Just that it's up and running? What would be the basic things to accomplish to be monitoring a device using a NMS.
3. I have the options to monitor the device using telnet, snmpv1,2,3, SSH, and a bunch of others. What are the advantages of one over the other? Do I need to use more than one? Which one will be able to tell me everything I would want?