Hi i decided to give open suse 11 a test run on my test server. I comes with SNMP, mrtg and nagios already reinstalled. After the usual configuration edits it was up in record time.
Howvever all my swiches report “SNMP Problem - no data received from host” The configurations are exactly the same for mandriva2008 and suse 10.3 which have no errors.
Well, there are so many things that could go wrong when polling via SNMP network equipments.
In short, you should check
-the SNMP version used
-the community
-the ACL on the switchs (is your server authorized ?)
-the routes (does your server know the route to the switch ? and does the switch know the route back ?)
Also, check the logs on the switches: do they see the SNMP request ?
…etc
Sorry I can’t help you further, but as you can see, there are quite a lot of things that can be wrong, and almost all are outside nagios (check the command definitions, just in case …)