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R7000 Please help! Issues with AP mode & disabled DHCP

Devilize
Aspirant

R7000 Please help! Issues with AP mode & disabled DHCP

This whole problem stemmed from a double NAT issue I have with my xbox one. I have, in the past, just bridged my cable router which has worked perfectly before but I have a TiVo that requires the DHCP to remain enabled on the cable router its connected to now, so I cant use that method. So now I've tried to either enable AP mode or Disable DHCP with terrible results. In AP mode only wifi works and I need the LAN ports to work as well. If I disable DHCP the lan ports work but the DHCP from my cable router never assigns an IP address to the wifi devices. I've spent far too long on this at this point and I'm at the end of my rope, please help.

 

Firmware Verson V1.0.3.24_1.1.20

 

Model: R7000|AC1900 Smart WIFI Router
Message 1 of 10
myersw
Master

Re: R7000 Please help! Issues with AP mode & disabled DHCP

In my experience you should be able to have the ISP's modem/router in bridge mode and set the r7000 up as a router. The r7000 would then act as the dhcp server. At least that is how I was setup when I had a Comcast modem/router set in bridge mode. My, at the time Linksys WRT3200ACM, provided the dhcp support. Do not see why you device would have to get dhcp assigned address from the cable modem/router. A router set as an AP expects to get the dhcp support from the attached device, in your case the modem/router, but it being set to bridge mode means dhcp is off. 

 

I guess more info is required if the above does not work for you. 

--Bill
ISP Comcast, Modem-Netgear CM1150V, Router-Unifi Security Gateway-Pro4, AP-2 Unifi AP-LR
Tesla > Edison
Message 2 of 10
Devilize
Aspirant

Re: R7000 Please help! Issues with AP mode & disabled DHCP

Not to be rude but I think I was very clear here. I have a TiVo through my cable company that requires the DHCP to be active through the cable router that it connects to via MoCA otherwise I would not be able to utilize the TiVo as designed. If I set the modem into bridge mode then that effectively disables the DHCP and thus the TiVo. That's not an option.

Message 3 of 10
myersw
Master

Re: R7000 Please help! Issues with AP mode & disabled DHCP


@Devilize wrote:

Not to be rude but I think I was very clear here. I have a TiVo through my cable company that requires the DHCP to be active through the cable router that it connects to via MoCA otherwise I would not be able to utilize the TiVo as designed. If I set the modem into bridge mode then that effectively disables the DHCP and thus the TiVo. That's not an option.


No offense taken. Sorry for missunderstanding. I am not familar with TiVo I guess therefore the bad info. 

It would seem that you could put the r7000 in AP mode and get IP addresses from the ISP modem/router for both the Ethernet attached devices as the wireless. With AP mode the r7000 dhcp should be disabled and all dhcp requests for IP address should be seen by the ISP modem/router and provide addresses. Are you running into some kind of address number limit on the ISP modem/router. That currently is the only idea I have as you have determined that you can get address assignments. A dhcp client just does a broadcast asking for a dhcp server to give it an address, nothing very complex there. Be sure you are following the directions as to which port on the r7000 that should be connected to the ISP modem/router. I believe it normally is the WAN port. 

--Bill
ISP Comcast, Modem-Netgear CM1150V, Router-Unifi Security Gateway-Pro4, AP-2 Unifi AP-LR
Tesla > Edison
Message 4 of 10
antinode
Guru

Re: R7000 Please help! Issues with AP mode & disabled DHCP

> [...] I have a TiVo that requires the DHCP to remain enabled on the
> cable router its connected to now, [...]

   So why not connect the TiVo to the R7000, instead, and do what "has
worked perfectly before"?

> Not to be rude but I think I was very clear here.

   You're wrong.

> [...] I have a TiVo through my cable company that requires the DHCP to
> be active through the cable router that it connects to via MoCA
> otherwise I would not be able to utilize the TiVo as designed.

   If you identified any of these things ("a TiVo", "my cable company",
"the cable router", ...), and revealed exactly how any of this stuff is
connected, then it might be easier to make some sense out of this "very
clear" explanation.  I can believe that your "a TiVo" needs access to
_some_ DHCP server, but it's not immediately obvious why that must be
your "the cable router".

> [...] In AP mode only wifi works and I need the LAN ports to work as
> well. [...]

   The R7000 LAN Ethernet ports should work when the R7000 is configured
as a wireless access point.  How, exactly, did you do that?  "not work"
is not a useful problem description.  It does not say what you did.  It
does not say what happened when you did it.  As usual, showing actual
actions with their actual results (error messages, LED indicators, ...)
can be more helpful than vague descriptions or interpretations.

> [...] If I disable DHCP the lan ports work but the DHCP from my cable
> router never assigns an IP address to the wifi devices. [...]

   That's expected behavior, and, if "double NAT" is the problem which
you are trying to solve, then disabling a DHCP server somewhere wouldn't
magically transform two cascaded NAT routers into anything else.

   If your (unspecified) "the cable router" has a DMZ option, which
would bypass its NAT features, then you could try specifying the R7000
there.  But configuring the R7000 as a WAP should work.

Message 5 of 10
Devilize
Aspirant

Re: R7000 Please help! Issues with AP mode & disabled DHCP

"So why not connect the TiVo to the R7000, instead, and do what "has
worked perfectly before"?"

 

Without going through the varied excuse I got with my provider as to why I cant connect it through my netgear it seems exceedingly more complex to switch my home network from coax to ethernet. The short answer is MoCA doesn't play nice with third party routers. My personal response is that It shouldn't matter because my netgear should work as intented via AP mode or DHCP disabled. 

 

"You're wrong." 

 

What you quoted was out of context, the person suggested I bridge the equipment that I had originally stated was no long an option. I also wasn't responding to be rude to just to emphasize that I has mentioned this originally.

 

"If you identified any of these things ("a TiVo", "my cable company",
"the cable router", ...), and revealed exactly how any of this stuff is
connected, then it might be easier to make some sense out of this "very
clear" explanation.  I can believe that your "a TiVo" needs access to
_some_ DHCP server, but it's not immediately obvious why that must be
your "the cable router"."

 

Its my understanding that knowing about my TiVo or even may cable company is irrelavent to my actual problem. AP mode doesnt allow lan ports to work, DHCP disabled doesn't allow wifi devices to obtain an ip address, that's my problem and those are my errors. Forget the TiVo and the cable cable company.  I should have provided my cable modem, however, apologies. Arris 2470. 

 

"The R7000 LAN Ethernet ports should work when the R7000 is configured
as a wireless access point.  How, exactly, did you do that?  "not work"
is not a useful problem description.  It does not say what you did.  It
does not say what happened when you did it.  As usual, showing actual
actions with their actual results (error messages, LED indicators, ...)
can be more helpful than vague descriptions or interpretations."

 

I connected an ethernet cable, as described in the user guide, from the modem lan port to the wan port of the router. This worked wirelessly but did not allow the lan ports to function. I switched it, for testing purposes, to a lan port, it still allowed wifi access but no lan function to any lan devices, I tested using a ps4 and xbox one wired to all available lan ports, one at a time, no change. Internally I only checked and applied the AP mode option within advance setup of the router browser. I factory reset my modem and disabled my DHCP and then ran into the issue of not being able to get any wifi device to obtain an IP address while the LAN connections worked just fine.

 

"That's expected behavior, and, if "double NAT" is the problem which
you are trying to solve, then disabling a DHCP server somewhere wouldn't
magically transform two cascaded NAT routers into anything else."

 

Yes I noticed I could find no way to disable NAT on the router, I was trying to manually AP mode this thing but it doesn't look like I can. Looks like it has an Open NAT mode vs Strict though, perhaps that option coupled with disabled DHCP?

 

"If your (unspecified) "the cable router" has a DMZ option, which
would bypass its NAT features, then you could try specifying the R7000
there.  But configuring the R7000 as a WAP should work."

 

I will try the DMZ option if I find no solutions or explanation for why my AP mode isn't working as it seems intended for. Thank you for the suggestion.

Message 6 of 10
antinode
Guru

Re: R7000 Please help! Issues with AP mode & disabled DHCP

> What you quoted was out of context, [...]

   No, it really wasn't.  I provided the quoted context.  Plenty of not
"very clear" there.

> Firmware Verson V1.0.3.24_1.1.20

   That might be related to the WAP v. LAN-Ethernet problem.  (It _is_
seriously stale.)  I haven't tried that version, but I just took an
R7000 running V1.0.7.12_1.2.5 (still far from current), put it into "AP
Mode", connected it (WAN/Internet port) to my main (modem+)router
(through an unmanaged gigabit switch or two, to a D7000 LAN Ethernet
port), and had no trouble using an old MacBook with a wired connection
to the R7000.  As I said, it should work.

Message 7 of 10
antinode
Guru

Re: R7000 Please help! Issues with AP mode & disabled DHCP

> [...] Internally I only checked and applied the AP mode option within
> advance setup of the router browser. I factory reset my modem and
> disabled my DHCP and then ran into the issue of not being able to get
> any wifi device to obtain an IP address while the LAN connections worked
> just fine.

   I don't know what "Internally" means here.  If you put the R7000 into
"AP Mode", then that disables _its_ DHCP server.  If you then also
"disabled my DHCP" (on the only remaning router-as-router?), then I
would not expect much to work.

   Adding a wireless access point to an existing (working) network
should require approximately no changes to the existing network, its
router, or anything else.  The only obvious exception would be if you
wanted to reserve a LAN address for the WAP on the (DHCP server on the)
main router, so that it would be easier to find it later.

   At this point, I'm sufficiently confused that I'd try to put the old
network configuration back to its original state, and verify that it all
works as before.  Reset the R7000, and update its firmware to at least
V1.0.7.12.  Put the R7000 into "AP Mode", and connect it as all the "AP
Mode" pictures show.  Don't play with anything else.  It should work.
Honest.

Message 8 of 10
Devilize
Aspirant

Re: R7000 Please help! Issues with AP mode & disabled DHCP

I will attempt a different firmware version and respond with my findings. Thanks for the feedback.

Message 9 of 10
Devilize
Aspirant

Re: R7000 Please help! Issues with AP mode & disabled DHCP

"I don't know what "Internally" means here.  If you put the R7000 into
"AP Mode", then that disables _its_ DHCP server.  If you then also
"disabled my DHCP" (on the only remaning router-as-router?), then I
would not expect much to work."

 

Apologies, I meant to say I factory reset my router not the modem, I made only one change to the cable modem settings during my troubleshooting process. I set a static IP for my r7000, this was one of the last steps I took. The results were the same, I could connect devices wirelessly to my r7000 but nothing via ethernet to the r7000 would connect online. The DHCP remained active on my cable modem through all steps of troubleshooting my r7000, no other changes to the cable modem were made.

 

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