Wireless router behind a wired router

For several reasons, I would like to set up my linksys wireless router
behind my linksys wired router, which is behind my cable modem..

Both boxes are ok, in that I can use either one behind the cable modem
properly.
But, when I put the wireless router behind the other router, I can't see the
net.

What am I missing?

--
KC6ETE Dave's Engineering Page, www.dvanhorn.org
Microcontroller Consultant, specializing in Atmel AVR

"Dave VanHorn" <(E-Mail Removed)> wrote in message
news:yqKdnQPftv3Uv6zcRVn-(E-Mail Removed)...
>
>
> For several reasons, I would like to set up my linksys wireless router
> behind my linksys wired router, which is behind my cable modem..
>
> Both boxes are ok, in that I can use either one behind the cable modem
> properly.
> But, when I put the wireless router behind the other router, I can't see
the
> net.
>
> What am I missing?
>
> --
> KC6ETE Dave's Engineering Page, www.dvanhorn.org
> Microcontroller Consultant, specializing in Atmel AVR

Some people use one of the routers as just an access point, and don't use
the router portion of that device. But I have two routers arranged exactly
as you've described, and it works for me. Devices on the middle LAN can't
see the devices on the LAN farthest from the cable modem, but all computers
can reach the Internet. Did you assign different subnet addresses to your
two LANs?

Ron Bandes, CCNP, CTT+, etc.

"Dave VanHorn" <(E-Mail Removed)> wrote in message
news:yqKdnQPftv3Uv6zcRVn-(E-Mail Removed)...
>
>
> For several reasons, I would like to set up my linksys wireless router
> behind my linksys wired router, which is behind my cable modem..
>
> Both boxes are ok, in that I can use either one behind the cable modem
> properly.
> But, when I put the wireless router behind the other router, I can't see
the
> net.
>
> What am I missing?

http://www.linksys.com/support/top10...20together.asp

Duane

Are the routers connected via their LAN ports or via a LAN port to WAN port
connection?

If the former, you may need a crossover cable between them. Also, you need
to turn off the wireless router's DHCP server and also assign it a fixed IP
address in the subnet of the wired router that is outside of the range that
the wired router is set to assign (i.e. if the wired router is at
192.168.1.1 and assigns addresses starting with 192.168.1.100 then the
wireless router should be set to a fixed address like 192.168.1.2).

If the latter, everything should work as long as both routers are set to
obtain their IP addresses via DHCP and are set to operate as DHCP servers
(usually the default configuration). You may run into problems with
applications that use UPnP since they may only open an incoming port on the
wireless router and not on the wired router (the one closest to the cable
modem) unless the wireless router also uses UPnP to instruct the wired
router.

-Yves

"Dave VanHorn" <(E-Mail Removed)> wrote in message
news:yqKdnQPftv3Uv6zcRVn-(E-Mail Removed)...
>
>
> For several reasons, I would like to set up my linksys wireless router
> behind my linksys wired router, which is behind my cable modem..
>
> Both boxes are ok, in that I can use either one behind the cable modem
> properly.
> But, when I put the wireless router behind the other router, I can't see
> the net.
>
> What am I missing?
>
> --
> KC6ETE Dave's Engineering Page, www.dvanhorn.org
> Microcontroller Consultant, specializing in Atmel AVR
>
>

Does this drawing show what you're trying to do?

Cable Modem
|
|
Wired Router
|
|
Wireless Router
| | |
| | |
C1 C2 C3

If so, remember that the Wireless router "sees" the Wired Router on the WAN
side.

I did this and created two IP ranges.

For the Wired router, have 192.168.1.1
For the wireless, I have 192.168.2.1

The wireless "WAN" address needs to an address on the wired "LAN".

I gave mine a static IP of 192.168.1.100, and told the Wireless to start
DHCP at 192.168.1.108 (I have a couple of other devices with static IPs)

That should do it. Note that I actually have my wireless router closest to
the
cable modem and my wired router behind it.

HTH

> Does this drawing show what you're trying to do?

Almost, this is more or less right.

> Cable Modem
> |
> |
> Wired Router
> | | |------------C5
> | |---------------C4
> |
> Wireless Router
> | | |
> | | |
> C1 C2 C3


I don't care if C4/5 can see C1/2/3 (and vice versa) or not. If they can,
that's a bonus, but I can take it either way.

The CM cable goes into the WAN port of the wired box, and port 8 of the
wired box goes to the wan port of the wireless box.

I'm trying to get this going now, and not having much luck..
I set up the wired box to start assigning IPs at 192.168.1.105
It's lan address is 192.168.1.1
My wired PCs are all accessing normally, so that part is ok.

With the wireless box disconnected from the wired box:
I defaulted the wireless box.
Then I set it for a WAN IP of 192.168.1.2
I set it's def gateway to 192.168.1.1
and DNS to same.
Subnet mask is 255.255.255.0
I disabled DHCP on the wireless box.

Then I shut down power to the wireless box, rebooted the test pc on the
wireless box, and powered up the wireless box.

On launching IE again, I re-checked my settings.

So then I plug the cable in, from the wired box's port 8 to the wan port on
the wireless box, and nothing.. Tried it also on port 4 (two port there,
one labeled "uplink" which gives me a link light, and the other one which
does not)

This is on a BEFW11S4 with Firmware 1.42.7 Apr 23 2002.



--
KC6ETE Dave's Engineering Page, www.dvanhorn.org

> Are the routers connected via their LAN ports or via a LAN port to WAN
> port connection?

Tried both..

> If the former, you may need a crossover cable between them.

I get a link light on both ends, in the LAN port, and in the "Uplink" port
next to port 4 on the wireless box. The uplink port also shows as 100mbit,
which would be preferable.

> Also, you need to turn off the wireless router's DHCP server and also
> assign it a fixed IP address in the subnet of the wired router that is
> outside of the range that the wired router is set to assign (i.e. if the
> wired router is at 192.168.1.1 and assigns addresses starting with
> 192.168.1.100 then the wireless router should be set to a fixed address
> like 192.168.1.2).

Yup.

> If the latter, everything should work as long as both routers are set to
> obtain their IP addresses via DHCP and are set to operate as DHCP servers
> (usually the default configuration).

Umm. Isn't the second router's DHCP supposed to be off per above?

> You may run into problems with applications that use UPnP since they may
> only open an incoming port on the wireless router and not on the wired
> router (the one closest to the cable modem) unless the wireless router
> also uses UPnP to instruct the wired router.

I don't anticipate needing that.
--
KC6ETE Dave's Engineering Page, www.dvanhorn.org
Microcontroller Consultant, specializing in Atmel AVR

> Some people use one of the routers as just an access point, and don't use
> the router portion of that device. But I have two routers arranged
> exactly
> as you've described, and it works for me. Devices on the middle LAN can't
> see the devices on the LAN farthest from the cable modem, but all
> computers
> can reach the Internet. Did you assign different subnet addresses to your
> two LANs?

Nope, should I? If so, then what?
I've never used the subnet features, I've always just left them in default.

--
KC6ETE Dave's Engineering Page, www.dvanhorn.org
Microcontroller Consultant, specializing in Atmel AVR

Can C4 and C5 see the Internet? If so, then the Wired router is set up
correctly.

The DNS entries on the wireless router need to be the same as on the wired
router.

I use cox, so I have my router closest to the cable modem to use DHCP on the
WAN
(Get IP automatically).

On my farthest router (your Wireless router), I have the WAN set to use a
static IP, but I
entered the same DNS IP addresses cox gave me. I think that might fix it
for you.



"Dave VanHorn" <(E-Mail Removed)> wrote in message
news:mfWdnQADIIfpuK_cRVn-(E-Mail Removed)...
>
> > Does this drawing show what you're trying to do?
>
> Almost, this is more or less right.
>
> > Cable Modem
> > |
> > |
> > Wired Router
> > | | |------------C5
> > | |---------------C4
> > |
> > Wireless Router
> > | | |
> > | | |
> > C1 C2 C3

No. As far as I know, DHCP is for the LAN ports only and is not passed on
through the WAN ports. Thus, if you connect
modem->router1wan->router1lan->router2wan you need to enable DHCP on both
routers in order for devices connected to router2lan to obtain IP addresses.

-Yves

"Dave VanHorn" <(E-Mail Removed)> wrote in message
news:drSdnUkiYPCBu6_cRVn-(E-Mail Removed)...
>> Are the routers connected via their LAN ports or via a LAN port to WAN
>> port connection?
>
> Tried both..
>
>> If the former, you may need a crossover cable between them.
>
> I get a link light on both ends, in the LAN port, and in the "Uplink" port
> next to port 4 on the wireless box. The uplink port also shows as
> 100mbit, which would be preferable.
>
>> Also, you need to turn off the wireless router's DHCP server and also
>> assign it a fixed IP address in the subnet of the wired router that is
>> outside of the range that the wired router is set to assign (i.e. if the
>> wired router is at 192.168.1.1 and assigns addresses starting with
>> 192.168.1.100 then the wireless router should be set to a fixed address
>> like 192.168.1.2).
>
> Yup.
>
>> If the latter, everything should work as long as both routers are set to
>> obtain their IP addresses via DHCP and are set to operate as DHCP servers
>> (usually the default configuration).
>
> Umm. Isn't the second router's DHCP supposed to be off per above?
>
>> You may run into problems with applications that use UPnP since they may
>> only open an incoming port on the wireless router and not on the wired
>> router (the one closest to the cable modem) unless the wireless router
>> also uses UPnP to instruct the wired router.
>
> I don't anticipate needing that.
> --
> KC6ETE Dave's Engineering Page, www.dvanhorn.org
> Microcontroller Consultant, specializing in Atmel AVR
>
>
>