Frequent & repeated of IP address to new network device

Question

Hi,&nbsp;Model D6220Modem Router Firmware: V1.0.0.74_1.0.74&nbsp;MacOS 11.5.1I've recently added a new wifi device to my home network, a solar PV inverter. This is all working fine and I can see the solar panel data via the manufacturers web site.Except, my Netgear router is resending the same LAN IP address to the inverter around 4 or 5 times an hour, pretty much continuously.The only thing I can think is that the wifi signal is weak at the inverter and the connection keeps getting lost and then reconnecting …?Any other thoughts?&nbsp;I guess I should get a wifi extender/booster?

michaelkenward · Answer

D6220 (your message) or D6200v2 (your footer)?
&nbsp;
GwentLarry&nbsp;wrote:
I've recently added a new wifi device to my home network, a solar PV inverter.
&nbsp;

A bit more detail might help. You never know, someone may have turned up here with questions about the same device.
&nbsp;
GwentLarry&nbsp;wrote:
Except, my Netgear router is resending the same LAN IP address to the inverter around 4 or 5 times an hour, pretty much continuously.

I don't understand what that means.
&nbsp;
You might get more help, and find earlier questions and answers specific to your device, in the appropriate section for your hardware. DSL Modems &amp; Routers

GwentLarry · Answer

michaelkenward&nbsp;wrote:D6220 (your message) or D6200v2 (your footer)?&nbsp;GwentLarry&nbsp;wrote:I've recently added a new wifi device to my home network, a solar PV inverter.&nbsp;A bit more detail might help. You never know, someone may have turned up here with questions about the same device.&nbsp;GwentLarry&nbsp;wrote:Except, my Netgear router is resending the same LAN IP address to the inverter around 4 or 5 times an hour, pretty much continuously.I don't understand what that means.&nbsp;You might get more help, and find earlier questions and answers specific to your device, in the appropriate section for your hardware.DSL Modems &amp; RoutersThe label on the router is D6220 - the Model dropdown doesn't list that …The device is a SolarEdge SE5000H Inverter for a Solar PV system - that connects to the manufacturers servers, uploading data on performance which I can monitor.The router log lists [DHCP IP: (10.175.0.3)] to MAC address 28:B7:7C:14:86:18 four or five times an hour. That MAC address is the SolarEdge inverter. This doesn't happen with other devices on my home network.&nbsp;And I find the options for where to ask questions rather less than obvious … :-)&nbsp;&nbsp;

michaelkenward · Answer

GwentLarry&nbsp;wrote:The router log lists [DHCP IP: (10.175.0.3)] to MAC address 28:B7:7C:14:86:18 four or five times an hour. That MAC address is the SolarEdge inverter. This doesn't happen with other devices on my home network.
So it is more a case of the router logging an incoming connection request than "resending the same LAN IP address to the inverter".
&nbsp;
So your theory about the wifi begins to make sense. Or it could be that the inverter tries connecting to a schedule.
&nbsp;
The router is just logging what goes on.
&nbsp;
That 10.175.0.3 IP address is a bit puzzling. It isn't one of usual 192.168.x.x&nbsp; defaults, and usually happens when there is something else on the network handing out IP addresses.
&nbsp;
There's a long discussion about SolarEdge inverters here:
&nbsp;
Solved: Constantly dropping connectivity - NETGEAR Communities
&nbsp;
That's why I asked what it is.
&nbsp;
I have no idea if it adds&nbsp;anything useful to your search for information. But it may suggest some things to try.
&nbsp;
&nbsp;
GwentLarry&nbsp;wrote:

And I find the options for where to ask questions rather less than obvious … :-)
&nbsp;

You are being too kind to the system, which is also responsible for the gaps in the drop-down options.
&nbsp;

GwentLarry · Answer

Well, I guess it is a 2-way process? The SolarEdge Inverter requests an IP address and the router send it - whatever, an IP address is being provided 4 or 5 times an hour which seems unusual to me for a device which is permanently on and nominally always connected to my LAN.&nbsp;However, as you say, it could be that the SolarEdge Inverter is simply connecting to upload data according to a schedule …&nbsp;While 192.168.x.x are the more usual IP addresses for private LANs, 10.x.x.x IP addresses are similarly reserved for private LANs. I've set up my router to use 10.x.x.x for several reasons:1. Initially, in order to access from home my employers intranet via a VPN. They were using 192.168.x.x and if my home router used the same sequence, it caused problems, so, on the advice of my employers' IT manager, I changed my router addressing to 10.175.x.x and never bothered to change back.&nbsp;2. Almost everybody assumes private LANs use 192.168.x.x By using a different sequence, I consider it makes my home network more secure, if only marginally.&nbsp;3. Why not use 10.x.x.x ?&nbsp;Thanks for the link to SolarEdge Inverter connectivity.&nbsp;I guess the issue here is that something is happening which is unusual and I want to understand why - everything works but there is something I don't understand :-)Thanks

michaelkenward · Answer

GwentLarry&nbsp;wrote:
Well, I guess it is a 2-way process? The SolarEdge Inverter requests an IP address and the router send it - whatever, an IP address is being provided 4 or 5 times an hour which seems unusual to me for a device which is permanently on and nominally always connected to my LAN.
&nbsp;

My confusion is in the "send" word. The router is sending nothing to the inverter beyond the usual network traffic. The router is simply recording that it has received, and accepted, a request for an IP connection. It "sent" that information to the logs.
&nbsp;
I asked about "sending" because it implied that the router was engaged in some sort of conversation with the inverter. That isn't terminology that people use in these circumstances, which is why I said I didn't understand what you were saying.
&nbsp;
&nbsp;
GwentLarry&nbsp;wrote:
While 192.168.x.x are the more usual IP addresses for private LANs, 10.x.x.x IP addresses are similarly reserved for private LANs. I've set up my router to use 10.x.x.x for several reasons:

I am familiar with all of that. And your&nbsp;explanation makes sense.
&nbsp;
I asked about it because when someone reports an IP address in that range it can be a sign of a messy network. If their router picked that 10.x.x.x address, without any deliberate action on the part of the user, it can&nbsp; be a sign of another router on the network, often&nbsp; a modem/router that would be better put into modem only mode. Knowing that is a useful diagnostic guide when trying to troubleshoot network problems. It is just one of the things on the usual checklist.
&nbsp;
GwentLarry&nbsp;wrote:
2. Almost everybody assumes private LANs use 192.168.x.x By using a different sequence, I consider it makes my home network more secure, if only marginally.
&nbsp;

That 10.x.x.x is also a well known internal IP network may not add much, ir anything, to your network security. It might, though, cause problems with devices that aren't used to that sort of address. But that's your call.

Forum Discussion

Frequent & repeated of IP address to new network device

10 Replies