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Why did my router switch from 192 to 172

NEM95
Aspirant

Why did my router switch from 192 to 172

I have a modem (SBG6580) given to me by my ISP. It is a modem router but I disabled it's broadcasting to use my Nighthawk instead. My router always used to be 192.168.1.1 where as my modem was 192.168.0.1, my modem was reset and now my router is 172.16.0.1 and I'm now experiencing a lot of DNS issues with my devices. Any idea what is going on? What is the best way to set up my network, like do I put my modem in bridge mode? Any help would be appreciated!
Model: R7000|Nighthawk AC1900 Dual Band WiFi Router
Message 1 of 5
antinode
Guru

Re: Why did my router switch from 192 to 172

> [...] It is a modem router but I disabled it's broadcasting to use my
> Nighthawk instead. [...]

   How, exactly?  Disabling its radio(s) does not disable its router

functions.

> [...] now my router is 172.16.0.1 [...]

   Which one, the ARRIS SBG6580 or the R7000?  In my experience, when a
Netgear router selects a non-default LAN IP address, it's "10.0.0.1",
not "172.16.0.1", but you can expect something non-default if you
connect its WAN/Internet port to another router.

> [...] What is the best way to set up my network, like do I put my
> modem in bridge mode? [...]

   It depends.  Why do you have the second router?  Generally, you want
one router, which means that either the SBG6580 should be in bridge
mode, or else the R7000 should be in wireless-access-point mode.  Check
the documentation on the SBG6580 to see if it does bridge mode.  Or ask
your ISP for a simple modem instead of this modem+router.  If the router
functions of the SBG6580 satisfy your router needs, and you want to
expand your wireless-network coverage, then configure the R7000 as a
wireless access point.

   Visit http://netgear.com/support , put in your model number, and look
for Documentation.  Get the User Manual.  Look for "Use the Router as a
Wireless Access Point".  

> [...] I'm now experiencing a lot of DNS issues with my devices. [...]

   Not a very detailed description of anything.

Message 2 of 5
NEM95
Aspirant

Re: Why did my router switch from 192 to 172

I disabled it radios yes, but I left it in router mode.

The R7000 switched from 192.168.1.1 to 172.16.0.1, and yeah I have the sbg6580 plugged into the internet port of the R7000.

I have the R7000 because of it's range and stability. I found the SBG6580 to be a pretty unreliable router and it didn't cover my whole house. So I wanted to completely disable it's router functions and use it simply as a modem. If possible though I would like to still be able to use the ports on the back of the sbg6580. The sbg6580 does support bridge mode.

Unfortunately the devices in question (ps4, switch, etc) don't go into much detail about it either, sorry about that.

Message 3 of 5

Re: Why did my router switch from 192 to 172


@NEM95 wrote:

I have the R7000 because of it's range and stability. I found the SBG6580 to be a pretty unreliable router and it didn't cover my whole house.


The R7000 does support access point mode. It will then provide wifi and you can use its LAN ports.

 

There is support material, including a manual, for the R7000 somewhere at the end of this link:

 

>>>> R7000 | Product | Support | NETGEAR <<<<

 

See the section Use the Router as a Wireless Access Point.

 

That will deal with the IP addressing issue.

 

But be warned that this will kill various features.

 

Disabled Features on the Router when set to AP Mode | Answer | NETGEAR Support

 

There may be other ways to remove the modem/router's router features. I'll leave you to research those.

 

 

Just another user.

My network DM200 -> R7800 -> GS316 -> PL1000 -> Orbi RBR40 -> Orbi RBS50Y -> RBS40V
Message 4 of 5
antinode
Guru

Re: Why did my router switch from 192 to 172

> [...] I wanted to completely disable it's router functions and use it
> simply as a modem. [...]

   Ok with me.

> [...]  If possible though I would like to still be able to use the
> ports on the back of the sbg6580. [...]

   If it's configured as modem-only, then you can connect one device to
it, and that would be the R7000-as-router.

> [...] The sbg6580 does support bridge mode.

   If it does, then you could configure the SBG6580 that way, and use
the R7000 as your router.  But all your client devices would need to be
connected to the R7000 (with only the R7000 connected to the
SBG6580-as-modem).

Message 5 of 5
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