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C7000v2 bridge mode and native wifi

Skippy414
Tutor

C7000v2 bridge mode and native wifi

Hello. Just got my c7000v2 and have easily connected with Comcast. Piece of cake.

My question is pretty simple, I think. With my last modem (Comcast Arris rental), in bridge mode, I still had wifi through the modem (downstairs) as well as wifi through my D-Link router (upstairs), with 4 different SSIDs - 2 for each device.

If I swich to Bridge Mode on the C7000v2, will I still have wifi networks originating from the C7000v2?

I don't want to try it until this is confiormed. Thanks in advance!

Model: A7000|Nighthawk AC1900 WiFi USB Adapter - USB 3.0
Message 1 of 13

Accepted Solutions
FURRYe38
Guru

Re: C7000v2 bridge mode and native wifi

Follow this for your DIR-880L router to configure it for AP mode:

http://forums.dlink.com/index.php?topic=40856.0

 

If you want to use the DIR router in router mode with the modem in router mode and avoid a double NAT issue, you can input the IP address the DIR router gets from the modem and put this into the modems DMZ. I use this all the time for having two routers on the same line. 


@Skippy414 wrote:

The Arris modem did still have WiFi in bridge mode. It also still had the universal xfinity public access WiFi channel.

The upstairs router is a D-Link  DIR-880L and doesn't appear to have an access point mode (router/bridge). 
C7000v2 Modem subnet: 192.168.0.1x
DIR-880L Router subnet: 168.192.100.1xx

I have had it set up with both in router mode since Sunday morning and so far, nothing seems to be amiss, though I read there can be conflicts because of NAT being enabled on the C7000v2 Modem.

The only things recorded in the event log on the C700v2 are 2.4GHz WiFi channel changes.


 

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Message 9 of 13

All Replies
FURRYe38
Guru

Re: C7000v2 bridge mode and native wifi

When using bridge mode, wifi and all router functions are disabled. 

Message 2 of 13
Skippy414
Tutor

Re: C7000v2 bridge mode and native wifi

And there's no way to get around this if I don't want to create conflicts, but keep all four wifi networks? Could I assign a static IP to the router and leave the modem in router mode, for instance? 




Message 3 of 13
antinode
Guru

Re: C7000v2 bridge mode and native wifi

> [...] With my last modem (Comcast Arris rental), in bridge mode, I
> still had wifi through the modem (downstairs) [...]

 

   Sounds unlikely.  "Bridge mode" and "WiFi" generally are mutually
exclusive.

 

> And there's no way to get around this [...]?

 

   If you want the C7000v2 to act as a modem+router, which would allow
its wireless stuff to work, then the usual way to add a device like your
(unspecified) "my D-Link router" to it would be to configure your
(unspecified) "my D-Link router" as a wireless access point, not as a
full-function router.

 

   Perhaps that's how it's configured now.  Do devices which are
connected to your C7000v2 get IP addresses in the same subnet
("192.168.0.*", I'd guess) as devices which are connected to your
(unspecified) "my D-Link router"?

Message 4 of 13
Skippy414
Tutor

Re: C7000v2 bridge mode and native wifi

The Arris modem did still have WiFi in bridge mode. It also still had the universal xfinity public access WiFi channel.

The upstairs router is a D-Link  DIR-880L and doesn't appear to have an access point mode (router/bridge). 
C7000v2 Modem subnet: 192.168.0.1x
DIR-880L Router subnet: 168.192.100.1xx

I have had it set up with both in router mode since Sunday morning and so far, nothing seems to be amiss, though I read there can be conflicts because of NAT being enabled on the C7000v2 Modem.

The only things recorded in the event log on the C700v2 are 2.4GHz WiFi channel changes.

Message 5 of 13
antinode
Guru

Re: C7000v2 bridge mode and native wifi

> The Arris modem did still have WiFi in bridge mode. [...]

 

   I don't see how it could.  With no router (and DHCP server), how
would a device which is wireless-connected to it get an IP address, and
from where?  I would not expect your ISP to hand out public IP addresses
like candy.  To do anything else, I'd expect a local router to be
involved.

 

> The upstairs router is a D-Link DIR-880L and doesn't appear to have
> an access point mode (router/bridge).

 

   Practically any router can be configured as a wireless access point.
See, for example:

 

      https://community.netgear.com/t5/x/x/m-p/1463500

 

   That's written for a Netgear C6300-as-WAP, but the steps are about the
same for any other router (any make/model) which lacks a one-step WAP
option.

 

> [...] Could I assign a static IP to the router and leave the modem in
> router mode, for instance?

 

   If that means something like the following, then the answer might be
"yes":

 

      Could I configure the D-Link DIR-880L with some kind of fixed IP
      address, and disable its DHCP server, and then connect it to the
      C7000v2 in its default modem+router mode?


   That's (roughly) the usual ad-hoc WAP scheme.

> C7000v2 Modem subnet: 192.168.0.1x

 

   That's as expected.

 

> DIR-880L Router subnet: 168.192.100.1xx

 

   That's not impossible, but it would be unlikely.  "168.192.100.1xx"
would be a public IP address (Sprint).  Assuming a typo,
"192.168.100.*" is typically used to access a DOCSIS (cable) modem (at
"192.168.100.1"), not by a router LAN.


   In any case, a configuration with multiple routers, and, hence,
multiple LAN segments/subnets, would typically suffer from problems with
"double NAT" (on all but the outer router), and communication between
devices on the different segments/subnets would require extra effort
(typically static routes).

 

   A configuration with one router (and any number of WAPs) uses one LAN
subnet, and avoids such problems.

Message 6 of 13
Skippy414
Tutor

Re: C7000v2 bridge mode and native wifi

The D-Link subnet is not a typo (see attached). I will seek out other resources. Thanks for your time and energy.

Message 7 of 13
antinode
Guru

Re: C7000v2 bridge mode and native wifi

> The D-Link subnet is not a typo (see attached). [...]

 

   Which one?  Read it again:

 

> DIR-880L Router subnet: 168.192.100.1xx

 

   I stand by the comments after that.  I never said that it couldn't
possibly work (with the corrected subnet), but I wouldn't do it that
way.

Message 8 of 13
FURRYe38
Guru

Re: C7000v2 bridge mode and native wifi

Follow this for your DIR-880L router to configure it for AP mode:

http://forums.dlink.com/index.php?topic=40856.0

 

If you want to use the DIR router in router mode with the modem in router mode and avoid a double NAT issue, you can input the IP address the DIR router gets from the modem and put this into the modems DMZ. I use this all the time for having two routers on the same line. 


@Skippy414 wrote:

The Arris modem did still have WiFi in bridge mode. It also still had the universal xfinity public access WiFi channel.

The upstairs router is a D-Link  DIR-880L and doesn't appear to have an access point mode (router/bridge). 
C7000v2 Modem subnet: 192.168.0.1x
DIR-880L Router subnet: 168.192.100.1xx

I have had it set up with both in router mode since Sunday morning and so far, nothing seems to be amiss, though I read there can be conflicts because of NAT being enabled on the C7000v2 Modem.

The only things recorded in the event log on the C700v2 are 2.4GHz WiFi channel changes.


 

Message 9 of 13
Skippy414
Tutor

Re: C7000v2 bridge mode and native wifi

I understand. I have very limited options. I am still working on it. I will post when solved. I am going to try the WAP solution.

Thanks for your help.

Message 10 of 13
FURRYe38
Guru

Re: C7000v2 bridge mode and native wifi

Let us know how it turns out. 

Message 11 of 13
Skippy414
Tutor

Re: C7000v2 bridge mode and native wifi

It worked great. All set. Good speeds (see attached), no conflicts. The D-Link router doesn't think it's connected to the interwebs because there's no WAN, but it's working great. I changed the WiFi network names to match on each router and assigned static channels to each. Connected devices easily switch channels depending on signal strength as you move through the house.

Very slick. Thanks for all the help FURRYe38 and antinode. 

Message 12 of 13
FURRYe38
Guru

Re: C7000v2 bridge mode and native wifi

Enjoy. Smiley Wink

Message 13 of 13
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