Linksys WRT54G router + D-Link DSL 300 T cable modem

I am having problems getting the two above devices to work together
despite having followed the setup instructions.

I now have the modem (ip 192.168.1.1) connected to the "Internet" port
of the router (ip 192.168.1.2) using a patch cable. Using a laptop
with wireless card I am able to ping the router but not the modem.

Connecting the modem to one of the LAN ports on the router enables me
to ping the modem and access its configuration. This reveals that the
modem is connecting successfully to my ISP and obtaining an IP
address.

As it is I have wireless network connectivity but no Internet access,
whether connecting the modem to the "Internet" or a LAN port on the
router and whether using a patch or corssover cable.

Any ideas please.

"Will" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> I am having problems getting the two above devices to work together
> despite having followed the setup instructions.
>
> I now have the modem (ip 192.168.1.1) connected to the "Internet" port
> of the router (ip 192.168.1.2) using a patch cable. Using a laptop
> with wireless card I am able to ping the router but not the modem.
>
> Connecting the modem to one of the LAN ports on the router enables me
> to ping the modem and access its configuration. This reveals that the
> modem is connecting successfully to my ISP and obtaining an IP
> address.
>
> As it is I have wireless network connectivity but no Internet access,
> whether connecting the modem to the "Internet" or a LAN port on the
> router and whether using a patch or corssover cable.
>
> Any ideas please.

If possible with the Linksys, try cloning your PC's MAC address into the
Routers configuration

You need to move the modem and the router out of the same subnet. If the
router is at 192.168.1.2 and the modem is at 192.168.1.1, then the router
will assume that the modem is downstream of one of the LAN ports. This is
why cable modems are usually found at addresses like 192.168.100.1. One
solution is to either change the address of the cable modem or the router to
something like 192.168.2.1 (i.e. change the third number, not the fourth).

-Yves

"Will" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> I am having problems getting the two above devices to work together
> despite having followed the setup instructions.
>
> I now have the modem (ip 192.168.1.1) connected to the "Internet" port
> of the router (ip 192.168.1.2) using a patch cable. Using a laptop
> with wireless card I am able to ping the router but not the modem.
>
> Connecting the modem to one of the LAN ports on the router enables me
> to ping the modem and access its configuration. This reveals that the
> modem is connecting successfully to my ISP and obtaining an IP
> address.
>
> As it is I have wireless network connectivity but no Internet access,
> whether connecting the modem to the "Internet" or a LAN port on the
> router and whether using a patch or corssover cable.
>
> Any ideas please.

"Yves Konigshofer" <(E-Mail Removed)> wrote in message news:<cego8e$6tr$(E-Mail Removed)>...
> You need to move the modem and the router out of the same subnet. If the
> router is at 192.168.1.2 and the modem is at 192.168.1.1, then the router
> will assume that the modem is downstream of one of the LAN ports. This is
> why cable modems are usually found at addresses like 192.168.100.1. One
> solution is to either change the address of the cable modem or the router to
> something like 192.168.2.1 (i.e. change the third number, not the fourth).
>
> -Yves

Thanks for the suggestion, but that didn't work. I changed the IP of
the router to 192.168.2.1 and when I try to ping the modem I get
"Destination net unreachable" from the command prompt and still no
Internet access.

I have also cloned the MAC address of my computer onto the router and
that has no effect either.

I have tested the cable modem connected directly to a PC via a
crossover cable and everything works fine.

Any other ideas? It's a shame that Linksys forgot to include any
instructions on connecting the router to a cable modem, so I'm a bit
stuck...

On 31 Jul 2004 10:21:04 -0700, (E-Mail Removed) (Will) wrote:

>I now have the modem (ip 192.168.1.1) connected to the "Internet" port
>of the router (ip 192.168.1.2) using a patch cable. Using a laptop
>with wireless card I am able to ping the router but not the modem.

I've been trying to make that work (with different hardware) using a
static route on the WAN side of the router. See:
http://www.dslreports.com/forum/rema...6714~mode=flat
One person in the thread claimed to have made it work by cloning the
MAC address but I can't reproduce his results. A static route should
be workable, as I proved when I kludged my Cisco 2514 router to do it,
but apparently not with my cheapo BEFW11S4 router.

It can made to work if you change the IP address of the modem to a
difference class c IP block (e.g. 192.168.111.1), install a 4 port
switch between the modem and the router, run a cable between the LAN
port on the WRT54G and the added switch, and add a 2nd IP address to
your monitoring computer as in:
http://www.dslreports.com/speak/print/default;10873529


--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558

If you connect your computer directly to the modem, do you the same IP
address assigned as the router when it is connected directly to the modem
via the WAN port (viewable on the Status page)?

Your cable modem should contain a DHCP server and, depending on what kind of
subscription you have with the cable company, can issue one and sometimes
more IP addresses. It is possible that it might only issue IP addresses to
devices the cable company knows about, which is why you may need to clone
the computer's MAC address into the router (but I guess that did not help
you). In any case, your router should be set to automatically obtain an IP
address via DHCP ("automatic configuration - DHCP" under internet connection
type) and, if everything is working properly, it should obtain the same
information as if it were a computer directly connected to the modem.

Assuming that both your computer and router can obtain the same (or very
similar) IP address when they are the only device connected to the modem,
you next need to make sure that the router assigns IP addresses that are not
in 192.168.1.x since the modem appears to be there on the WAN port. Thus,
change the local IP address of the router to 192.168.2.1 and use a
255.255.255.0 subnet mask. Finally, the starting address for DHCP should be
set to something like 192.168.2.100. The first computer you connect to the
router on a LAN port should be assigned this address and should obtain
additional info (such as nameservers) that you can view using the "ipconfig
/all" command in Windows.

-Yves

"Will" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> "Yves Konigshofer" <(E-Mail Removed)> wrote in message
news:<cego8e$6tr$(E-Mail Removed)>...
> > You need to move the modem and the router out of the same subnet. If
the
> > router is at 192.168.1.2 and the modem is at 192.168.1.1, then the
router
> > will assume that the modem is downstream of one of the LAN ports. This
is
> > why cable modems are usually found at addresses like 192.168.100.1. One
> > solution is to either change the address of the cable modem or the
router to
> > something like 192.168.2.1 (i.e. change the third number, not the
fourth).
> >
> > -Yves
>
> Thanks for the suggestion, but that didn't work. I changed the IP of
> the router to 192.168.2.1 and when I try to ping the modem I get
> "Destination net unreachable" from the command prompt and still no
> Internet access.
>
> I have also cloned the MAC address of my computer onto the router and
> that has no effect either.
>
> I have tested the cable modem connected directly to a PC via a
> crossover cable and everything works fine.
>
> Any other ideas? It's a shame that Linksys forgot to include any
> instructions on connecting the router to a cable modem, so I'm a bit
> stuck...

(E-Mail Removed) (Will) wrote in
news:(E-Mail Removed) om:

> I am having problems getting the two above devices to work
> together despite having followed the setup instructions.

Excuse me butting in, but as I've seen another couple of posts in the
same thread also repeating the same wording...

The DSL-300T is *not* a cable modem. It's an ADSL modem.

Do ensure that you're running current firmware. The device is fairly
new, and there have already been a couple of updates. The current
version is v1.00B02T02.UK.20040618.Find it here:
<ftp://ftp.dlink.co.uk/dsl_routers_modems/dsl-300t/>

The reason for the updates is that the processor in the device is
common to other T series D-Link products (DSL-504T, DSL-G604T et al)
and runs the BusyBox Linux kernel. There are many functions available
in the early firmware releases which are not appropriate to a modem
but were included - I guess it uses code common across the model
range. These functions have now been 'turned off' - see the Release
Notes for info.

Hope this helps



--

Richard Perkin
To email me, change the AT in the address below
richard.perkinATmyrealbox.com

It's is not, it isn't ain't, and it's it's, not its, if you mean it
is. If you don't, it's its. Then too, it's hers. It isn't her's.
It isn't our's either. It's ours, and likewise yours and theirs.
-- Oxford University Press, Edpress News

Thanks for the help everyone. I have now got it working and am posting
from a laptop connected to the WRT54G wirelessly.

It transpired that I had done something silly and switched off the
DHCP server in the modem, mistakenly believeing that I did not want
DHCP running on both router and modem.

In fact, with the router set to "Automatic configuration - DHCP", DHCP
does need to be enabled on the modem. A bit obvious - just goes to
show it is easy to lose sight of the easy solution sometimes I
suppose...

Anyway, for anyone experiencing a similar problem in future, the
working setup is as follows:

Modem - ip 192.168.2.1, DHCP server enabled, connected to "Internet"
port of router via cat 5 patch cable

Router - ip 192.168.1.1, DHCP server enabled

Desktop PC connected to port 1 of router via cat 5 crossover cable,
set to obtain IP address via DHCP.

Laptop with wireless card, set to obtain IP address via DHCP.

All working great.

Thanks again for your help.

Regards

Will

Richard Perkin <(E-Mail Removed)> wrote in message news:<(E-Mail Removed)>...
> (E-Mail Removed) (Will) wrote in
> news:(E-Mail Removed) om:
>
> > I am having problems getting the two above devices to work
> > together despite having followed the setup instructions.
>
> Excuse me butting in, but as I've seen another couple of posts in the
> same thread also repeating the same wording...
>
> The DSL-300T is *not* a cable modem. It's an ADSL modem.
>
> Do ensure that you're running current firmware. The device is fairly
> new, and there have already been a couple of updates. The current
> version is v1.00B02T02.UK.20040618.Find it here:
> <ftp://ftp.dlink.co.uk/dsl_routers_modems/dsl-300t/>
>
> The reason for the updates is that the processor in the device is
> common to other T series D-Link products (DSL-504T, DSL-G604T et al)
> and runs the BusyBox Linux kernel. There are many functions available
> in the early firmware releases which are not appropriate to a modem
> but were included - I guess it uses code common across the model
> range. These functions have now been 'turned off' - see the Release
> Notes for info.
>
> Hope this helps
>
>
>
> --
>
> Richard Perkin
> To email me, change the AT in the address below
> richard.perkinATmyrealbox.com
>
> It's is not, it isn't ain't, and it's it's, not its, if you mean it
> is. If you don't, it's its. Then too, it's hers. It isn't her's.
> It isn't our's either. It's ours, and likewise yours and theirs.
> -- Oxford University Press, Edpress News

Hi there!!

I've just read all this thread and i plan to buy exactly the sam
equipment as you did Will

I just wanted to know if the DSL-300T modem provides a nice stabl
connection

Did you have any more problems with the modem/router after configurin
or everything is just rocking

Thanks for the help!

--
sag
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