I am new to Solarwinds facing this issue need your support in this, I have few nodes which are shown as down. But when I try to ping them from my machine, they are pingable checked with Notwork Administrator they informed device is Up.
So either something, like a firewall, is blocking the connection OR you have the snmp community wrong.
You likely have an snmp GUI tool on your orion server at:
C:\Program Files (x86)\SolarWinds\Orion\SnmpWalk.exe
You can use that for testing. It won't help you tell the difference between a firewall block or a wrong community, but it takes the Orion processes out of the picture, since it's a stand alone utility.
Once you get the node added and working. When you do a list resources, you have the option of using ICMP or SNMP for the up/down status.
I cannot say which is better. Networking people will always chose ICMP, but as the monitoring guy, I prefer SNMP.
The advantage of ICMP is that the device will show green even if something is wrong with snmp.
The advantage if SNMP is that the device will show red, so that you know something is wrong with snmp.
It's just a matter of perspective. If you want the best of both worlds, then you can choose ICMP, and add another monitor for SNMP, such as using SAM or maybe UnDP.
If your Solarwinds NPM server can ping the devices, but it still says they are down, you simply need to Edit the device(s) in NPM and confirm it's using the correct polling methods (ICMP? SNMP-v3? Agents?), and that everything matches between the node(s) and your poller.
For example, if there were an access-control list or Windows firewall active on the device, but it's not been configured to allow your Solarwinds system to talk to it using the right protocols and pre-shared keys or community strings, you may be able to ping it but it will still show down in NPM, depending on what you've set NPM to use to monitor it.
If there are no ACL's in place that would limit access (if you have to white list your NPM nodes, do so), and if there are no firewalls between the node and your NPM poller, you should be good for monitoring it.
Share some screen shots of how you've set up NPM to Edit a specific problem node. I bet we can find the issue and make some helpful suggestions.
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