Frequent & repeated of IP address to new network device

GwentLarry
Aspirant
Aug 02, 2021
michaelkenward wrote:
D6220 (your message) or D6200v2 (your footer)?

GwentLarry wrote:
I've recently added a new wifi device to my home network, a solar PV inverter.

A bit more detail might help. You never know, someone may have turned up here with questions about the same device.

GwentLarry 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.

You might get more help, and find earlier questions and answers specific to your device, in the appropriate section for your hardware.

DSL Modems & Routers

The 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.

And I find the options for where to ask questions rather less than obvious … :-)
- michaelkenward
  Guru - Experienced User
  Aug 02, 2021
  GwentLarry 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".
  
  So your theory about the wifi begins to make sense. Or it could be that the inverter tries connecting to a schedule.
  
  The router is just logging what goes on.
  
  That 10.175.0.3 IP address is a bit puzzling. It isn't one of usual 192.168.x.x defaults, and usually happens when there is something else on the network handing out IP addresses.
  
  There's a long discussion about SolarEdge inverters here:
  
  Solved: Constantly dropping connectivity - NETGEAR Communities
  
  That's why I asked what it is.
  
  I have no idea if it adds anything useful to your search for information. But it may suggest some things to try.
  
  GwentLarry wrote:
  
  And I find the options for where to ask questions rather less than obvious … :-)
  
  You are being too kind to the system, which is also responsible for the gaps in the drop-down options.
  - GwentLarry
    Aspirant
    Aug 03, 2021
    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.
    
    However, as you say, it could be that the SolarEdge Inverter is simply connecting to upload data according to a schedule …
    
    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.
    
    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.
    
    3. Why not use 10.x.x.x ?
    
    Thanks for the link to SolarEdge Inverter connectivity.
    
    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

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Frequent & repeated of IP address to new network device