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LAN IP questions

ITGUY2013
Community Member

Can the primary nest Wi-Fi pro routers wan IP changed? If so are there any downsides to doing this? For ex. 192.168.86.1 is typically out of the box, can I choose something random like 158.247.95.1 or  am I confined to 192.168.86?

5 REPLIES 5

David_K
Platinum Product Expert
Platinum Product Expert

You mentioned both WAN and LAN IPs in the question so I'll answer both. Your WAN IP is normally automatically assigned by your ISP via DHCP. Unless you have a static IP address provided by your ISP, you cannot change it. You can however change your LAN IP range, but it must conform to the RFC 1918 standard, it isn't totally random.

Set a custom LAN IP - Google Nest Help

MichaelP
Diamond Product Expert
Diamond Product Expert

Hello @ITGUY2013 

The WAN IP address will be assigned by your internet service provider (assuming you don't have an "outer" NAT router – i.e., "double NAT"). But, from the rest of your question, I'll assume you mean the LAN IP address range that the Nest WiFi Pro primary/router unit uses to assign addresses to "inner" network devices on the network it creates.

The answer is that you can't choose something random. The IETF (Internet Engineering Task Force, the standards body that creates and maintains all of the standards that make the internet work) has documented the "Private" IPv4 addresses that can safely be used in networks like these. The specification for that address space is in RFC 1918, which includes an 8-bit netmask space from 10.0.0.0 to 10.255.255.255, a 12-bit netmask space from 172.16.0.0 to 172.31.255.255, and a 16-bit netmask space from 192.168.0.0 to 192.168.255.255. It is this latter space that most home routers use, but with a wider netmask, typically 24 bits, enabling about 250 addresses to be assigned to local devices. That's why you see a lot of home routers use local networks that look like 192.168.0.x or 192.168.1.x. It's important to use addresses in one of these ranges since you can't communicate with a machine on the public internet using the same IP address as your local network.

I can't say why Google chose 192.168.86.x for their network address range, but I can speculate that in a double NAT situation, using something other than 192.168.0.x makes it less likely they'd have to automatically pick something different on the fly.

Routing is somewhat complex, especially when NAT firewalls are in the picture. But, I hope this helps a bit!

Fantastic answer by the way and thank you for taking the time to really put that information in I'm still in the process of troubleshooting why my Wi-Fi speeds are half of what I pay for and I have two Google support tickets open on it and the answers they provide are no good doesn't work they actually suggested that I change the modem IP address through my ISP and change my Wi-Fi pro router IP my hardwired speeds are fantastic My Wi-Fi speeds or garbage

ovidioj
Community Specialist
Community Specialist

Hello @ITGUY2013,

 

Thanks for posting in the community. 
Thank you for your continued efforts to troubleshoot your Wi-Fi speed issue. I understand the frustration of not achieving the expected speeds. I appreciate your effort in trying to fix it on your own. Please let me know if you are still encountering issues; if so, please share the following information to provide more specific assistance: 

  • Who is your internet service provider?
  • What is your internet plan and advertised speed?
  • Have there been any recent changes to your network setup (e.g., new devices, router updates)?
  • When did the issue start? 
  • Do you use a modem and router combo?
  • How many devices actively use the internet at once?
  • Is there a switch located on the network?
  • What troubleshooting steps have you already tried before you contacted support?

With this additional information, I can offer more tailored troubleshooting steps. Thank you.

 

Regards,
Jorge

ITGUY2013
Community Member

You are correct. I meant the LAN IP address of my Wi-Fi pro router and the devices connected to it.