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sadatoni's avatar
sadatoni
Aspirant
Apr 19, 2023

R6260 Router changes its WAN/LAN addresses after changing DNS servers

This has happened twice now.  I'll describe the latest.  The router was a 10.0.0.1, DHCP set for 10.0.0.2 to 10.0.0.50.  DNS servers were set for 10.0.0.11 and 1.0.0.1.   Changed The 10.0.0.11 to 1.1...
sadatoni's avatar
sadatoni
Aspirant
Apr 22, 2023

System: ARRIS DOCSIS 3.0 / PacketCable 2.0 Touchstone Telephony Modem
HW_REV: 1
VENDOR: ARRIS Group, Inc.
BOOTR: 2.2.0.45
SW_REV: 9.1.103J8TW1.SIP.PC20.TW
MODEL: TM1602AP2

 

Hmmm, I just found Get "Dynamically from ISP" selected. I've switched it to "Use Static IP Address", which is what I always thought I had selected.  Hopefully that fixes my issue.

 

I'm running just one router, with a 4-port switch connected to it.

 

Thanks for responding. It got me looking where I didn't double check.

 

michaelkenward's avatar
michaelkenward
Guru - Experienced User
Apr 22, 2023
sadatoni wrote:

 

Hmmm, I just found Get "Dynamically from ISP" selected. I've switched it to "Use Static IP Address", which is what I always thought I had selected.  Hopefully that fixes my issue.

 

Be careful not to get confused by WAN and LAN addresses. DNS server addresses are nothing to do with those.

 

What address is set to get "Dynamically from ISP". WAN or DNS? They have nothing to do with the 10.x.x.x and 192.168.x.x. addresses which are local to you.

 

The WAN address is in the hands of your ISP. Most ISPs hand out an WAN address that can change as it likes. They may charge for allocating a fixed WAN IP.

 

This has nothing to do with the LAN IP address. That is something that is private to you and isn't related to the DNS server. That's something related to your connections to addresses on the Internet.

 

Many ISPs have their own preferred DNS server. But there are public DNS servers out there that can be useful. Most users can safely ignore this.

 

Your setup is so simple that it would be a good idea to reset the router, set it up again and leave things alone until you hit a problem. Then work out how to fix it.

 

As it is, the changes you say you made make no sense and are likely to cause problems.