Disable auto change IP address

Guru - Experienced User

Feb 01, 2019

This discussion has exposed even more of my networking ignorance, and I am so confused. It appears that I do not even understand the problem. i.e. What, exactly, causes garretg84 to go "chasing IP's" every month?"

My modem/router is a ubee DVW32CB. It has been installed for years. My devices appear to do what they are supposed to do. I have PC's, phone, tablets, TiVo, television, Blu-Ray, Vizio soundbar, thermostat, wall plugs, IP cameras, etc. Everything "works". I used the password printed on the ubee label to check the modem settings. Although the "radio" is set to "enabled", both the 2.4G and 5G "primary networks" are set to "disabled" and I cannot detect any WiFi coming from the modem/router. I cannot find a setting called "Passthrough", but on the "Advanced" tab there is a setting called "Primary Network Bridged" which is not enabled. The modem definitely assigns DHCP. Although the modem web interface is at 198.162.100.1, it gives itself 198.162.0.1 and assigns my Orbi 192.168.0.3 (have no idea what happened to "2") So, it is pretty clear that I have a "double NAT."

My Orbi also assigns DHCP in 198.162.1.x and gives itself 198.162.1.1. Frankly, I do not understand what difference it would make if I had chosen 10.99.99.x and given the Orbi 10.99.99.1. What happens on the WAN side is entirely separate from the LAN side. (Or, not?)

So, why does he go through hell every month and I do not? Is it because even with numerous devices, my network use is "dirt simple?" i.e I do not use DDNS, VPN, port forwarding, port triggering, etc. etc.? If I tried any of those things, my "double NAT" would cause me to fail? If I set my ubee modem "Primary Network Bridged" to "enable", would my life to to hell?

There is something that must be obvious to everyone that I just do not understand.

FURRYe38
Guru - Experienced User
Feb 01, 2019
Ok, just checking and trying to understand your configuration.

Yes seems like the Orbi is havning problems with the modem and possible modem changes.

Something to try, can you set up a static IP address using the public IP address the Orbi is getting from the modem pass thru? Instead of using Dynamic DHCP try Static Mode on the WAN port. Normally this shouldn't be needed and it would normally required having the ISP give you static IP address. Something you might ask the ISP about so the public IP address doesn't change. However this maybe a problem with the orbi router and could be just faulty as others have modems with pass thru and havn't expressed this kind of problem with there Orbi. Something I would file a ticket here and get more help on and ask about an RMA:

https://www.netgear.com/mynetgear/registration/login.aspx

RMA would reveal if the problem was the Orbi you have now or something in FW that doesn't like your particular modem combo unit.

garrettg84 wrote:

I guess nobody read my actual post. I said *public ip* as in non-rfc1918 or other reserved IP space. There is no double NAT. The ISP calls bridge mode 'pass through'. I have no access to the modem itself other than to view its connectivity status (ISP locks us out) - and that is only while I've been given an RFC 1918 non-public IP before it connects and turns into pass through (bridge) mode.

TLDR - No double NAT. No actual IP conflict. Orbi loses its mind.
- garrettg84
  Guide
  Feb 01, 2019
  This issue has been present in all versions of the firmware I've touched (at least 2 updates I can remember off the top of my head besides the firmware it came with out of the box). I simply need the ability to turn of this nanny ip conflict detection service. I don't want it. It breaks my device and incorrectly detects conflicts when there are none in actuality. Everything else works swimmingly. Thinking about it, statically assigning the IP address will probably prevent the thing from going into stupid mode. I'll still be stuck with a bad connection monthly that I'll have to intervene and change it to another IP.
  
  To get an actual static IP from the ISP I've got to upgrade to business class. This doubles my price, cuts my bandwidth in half, but garantees the bandwidth alotment - of which I've never had a problem. This is not a solution.
  
  The product needs to be fixed. The ability to disable a service that causes breakage is what is necessary. If I can't get some support from Netgear on the idea, I'll simply change my positive Amazon reviews to something negative and move to another vendor that won't lose its mind monthly.
  - CrimpOn
    Guru - Experienced User
    Feb 01, 2019
    So, the Orbi is going crazy once a month (a) because the ISP is literally "restarting" the modem, and (b) the ISP has put the modem in Bridge Mode and the user cannot take it out?
    
    Wow. I did not realize that ISP's were resetting our modems every month, and the modem could be giving out goofy temporary DHCP assignments. (I had thought that when the modem was resetting it didn't talk to the LAN side at all.) My modem's DHCP lease lasts one hour, so the ISP has multiple opportunities to change the public IP every day. I guess the reason my Orbi doesn't go crazy is that I am not in "Bridge Mode."
    
    My Orbi also gets a DHCP lease good for one hour, so I would think that in (30 minutes, correct?) the Orbi would ask to renew the lease, get the new one, and things would straighten out? Or, does the modem in Bridged Mode give that temporary IP out with a longer lease?
    
    So, I am wondering what issue is going to push me into changing to Bridge Mode? (I am not eager to fall into a monthly recurring nightmare.) Is it VPN? Port forwarding? Performance?

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