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Monitor device that uses Solarwinds IPs internally

I've just installed a new device in my network that has an internal IP scheme (for internal traffic) that matches the IP range that our Solarwinds servers live on. I need a way to monitor that device - suggestions. I do have a secondary poller, but it is on the same network range as our primary server.

Is there a way to put a secondary IP address on the polling server and force it to source from that IP for hitting this device (there will eventually be several on this range, but not nearly enough to justify an additional poller.

For those of us that prefer pictures see below (Note, IPs shown are not the real ones, just ones I made up for illustration purposes)

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ken_cohen

Would it be possible to change the network connection to a trunk port and carry the network ranges as separate vlans? Then you could have NPM poll on the 192.168.95.x network directly. Just a thought, and you should take it with a grain of salt.

tallyrich

The problem is on the network I show as 192.168.1.x. When the device tries to respond to the 192.168.1.x it sees it as an internal address and tries to talk to it's internal network rather than reaching out to the SolarWinds server. If either the SolarWinds server or this device were behind a firewall or router I could build a NAT, but since they are both on an internal network I don't really have a way to do that.

ken_cohen

Could you draw it out? I'm not visualizing the layout in a way where this shouldn't work.

d09h

For the polled device, set a route on it (persistent) so that it knows to reach SolarWinds server 192.168.1.50 via interface Whatever. What is the polled device? This can help us suggest ideas for how to accomplish this goal.

rschroeder

You'll need to do one of the following to successfully have Solarwinds monitor conflicting IP address ranges within your network:

Change the IP address scheme of the conflicting devices so they don't conflict with your main network
Change the address conflicts on your main network so there are none with those "special" devices
Provide a NAT router between your SW poller and the device(s) with conflicting addresses; then monitor the conflicting/problem devices via that NAT router
Install an additional NIC on the device with the conflicting address, and monitor the device via a different address on the NIC that does NOT conflict with your main network.

In many organizations 192.168.0 and 192.168.1 networks are not allowed to be built, and are changed when they are discovered. This is because SOHO/Consumer DHCP devices use those address ranges by default. If/when someone buys a home router or wireless access point, brings it into work, and lets it start offering DHCP addresses to your internal network in ranges you're already using, that would be inconvenient to troubleshoot at best, and will cause a growing network outage to users' devices which start getting their DHCP requests served by that rogue DHCP service.

It's better to use different address schemes so any rogue DHCP servers/AP's/Routers show up as red flags on the network. If everyone is used to seeing 10.x.x.x or 172.16.x.x or a 192.168.x that isn't 0 or 1--and a 192.168.0 or 192.168.1 shows up, you know it's unauthorized, and it's easier to chase down and disable/remove.