Disable auto change IP address

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CrimpOn wrote:

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?"

 

This is what they are trying to figure out.

 

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."

 

Yes, you have double NAT. Most people will never notice. It makes life difficult for me because I have to host internet accessible things from time to time which is why I had to ask my ISP to put me in "pass through" (bridge) mode to eliminate 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?)

 

That is not entirely true. Most network devices will not function with overlapping IP space (though being chosen as a gateway a device could simply pass traffic anyways, but they don't). When they create their internal route tables, which interface would they send out to for the next hop if the had overlapping networks? 

 

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?

 

Your double NAT is probably protecting you. Your IP address is staying the same when your modem actually resets. Because mine must offer local rfc1918 addresses before it connects for diagnostic purposes it is freaking out the Orbi more than likely. Unfortunately, even the rfc1918 addresses do not conflict with the Orbi's network 192.168.100.x vs 10.99.99.x and it still loses its mind. It then continues to flip between different subnets still thinking there is a conflict. The cable modem is humming along at 192.168.100.x - then dropping the interface and bringinb it back up with a public IP (45.36.x.x) and Orbi is flipping through 4 or 5 different rfc1918 subnets and still thinks there is a conflict. This is why I'm insistant that there is a bug.

 

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

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No. There is nothing that you aren't picking up on here. Most of these folks are ignoring what I post and just posting common responses to similar sounding issues.