India Broadband Forum

fernac0a

Any lucky person has succeeded in making tht two work together for Wireless transmission at home.

player

what problem you are facing .............could you please elaborate a little bit

fernac0a

Hey, thanks for your attempt to help.

Well my Modem works fine hard-wired to my Desktop.

When I put the BroadBand Router inbetween the Internet does not connect.

WRT54GS is only a Router and not a Modem.

In installing the Router using the manufacturers CD, I chose the defaults, enabling the Router for DHCP.

The Modem is set as a DHCP Server with IP 192.168.1.1 with PPPOE LLC/SNAP.

Any suggestions?

skap

Did you find out and change your default IP of your router?

If not, the default IP for your router is 192.168.1.1 which is same as your modem. so first change the router's ip to another one (say 192.168.1.2) in same segment.

Disable dhcp in modem and enable it in router for same segment (192.168.1.30-55).

fernac0a

Hey SKAP, Thanks.

What you suggest makes sense. Let me see if I got it right. Please bear with me I am downloading WXP SP3 about 67% thru. When it completes I will try your suggestion.

1. Disable DHCP on Modem
2. Change my Router default IP to something else other than 192.168.1.1
3. Enable DHCP on Router from 30-55

How do I change a default IP?
Also how do I enable DHCP on Router?

Earler, I did attempt to use "StaticIP" instead of "DHCP" as:
IP 192.168.1.2
Subnet 255.255.255.0
Gateway 192.168.1.1 (Modem)
Obviously, this did not work as I am here seeking your help...

fernac0a

This post replaces earlier post

Hey SKAP, Thanks.

What you suggest makes sense. Let me see if I got it right. Please bear with me I am downloading WXP SP3 about 67% thru. When it completes I will try your suggestion.

1. Disable DHCP on Modem
2. Change my Router default IP to something else other than 192.168.1.1
3. Enable DHCP on Router from 30-55

How do I change a default IP on the Router?
Also how do I enable DHCP on Router?

Earler, I did attempt to use "StaticIP" instead of "DHCP" on he Router as follows:
IP 192.168.1.2
Subnet 255.255.255.0
Gateway 192.168.1.1 (Modem)

Obviously, this did not work as I am here seeking your help...

skap

Ok
For modifying router's IP, first assign static IP (say 192.168.1.50) to your computer and connect it to router. Donot connect modem at this stage. Access your router through http (http://192.168.1.1), it will bring you router's console page where you can modify IP and enable DHCP.

If you are not able to access through http, try telnet 192.168.1.1 and modify IP and DHCP

Also dont forget to disable DHCP in modem.

Please note: I assume that router's default configuration is not modified. If you have modified and assigned different IP, you need to access your router only through that IP orelse need to bring your router to factory default.

skap

good you tried assigning static ip to router before? then did u try assigning a static ip as below to your computer?
IP 192.168.1.3
subnet 255.255.255.0
gateway 192.168.1.2 (router)

also let us know in which ports you have conencted your modem and computer in router.

fernac0a

Thanks.

No.
I did but I used the gateway as the Modem (192.168.1.1)
I am 92% thru with WXP SP3 download ... am all excited to try your suggestion ... took me two hours to get here ... though I'm tempted to abort.

Let me see if I have it right.

I leave the Modem with it's default IP of 192.168.1.1
Next, I give the Router a Static IP of 192.168.1.2 with the Modem as gateway
Finally, I give the PC a Static IP of 192.168.1.3 with the Router as gateway.

You think this should resolve my problem?

So all other Wireless PCs should have the gateway as 192.168.1.2?

skap

Yes. But let me know how you have done cabling? because sometimes you need to connect modem in LAN instead of WAN thats y

skap

I mean LAN/WAN port in router.

fernac0a

Sorry to disappoint it did not work.

Without Router (works)
===========
My ZTE DSL Model is connected to the BSNL Tel Line.
An Ethernet cable connects from the Modem to the Ethernet Adapter on my Desktop.

With Router (not working)
=========
My ZTE DSL Model is connected to the BSNL Tel Line.
The same Ethernet cable connects my ZTE DSL Modem to the Internet port on my WRT54GS Router (instead of the Desktop PC Adapter).
Another Ethernet cable runs from one of the 4 ports on my WRT54GS Router to the Ethernet Adapter on my Desktop PC.

I managed to change the IP Address on the ZTE DSL Modem permanently to 192.168.1.2 and disabled the DHCP on the Modem. Note that this still works without the Router in between.

I enabled DHCP on the Router and set its default of 192.168.1.1, but ot no avail.

I am able to ping the Router but not the modem.

Any suggestions?

skap

Did you cross check that router's IP is 192.168.1.1?
Did you change the gateway of router to 192.168.1.2?

If you have done so, 1st option is
Assign static IP in your computer say 192.168.1.3 and gateway as 192.168.1.1 and check?

Another option is
Instead of connecting modem in Internet port of router, connect in one of four ports and check. For this also assing static IP in computer check...then we go next step to configure DHCP.

fernac0a

Thank you Thank you Thank you

The suggestion that worked was to move the Ethernet cable from the Modem to another of the 4 ports.

I see the logic now and will experiment further.

I put the cable from the Modem into one of the 4 ports in the Router instead of the Internet (WAN) port.

The trick was to set the gateway of the Router to the IP of the Modem and the gateway of the PC to the IP of the router. Disable DHCP on both the modem and the router.

Modem: 192.168.1.2
Router: 192.168.1.1
PC: 192.168.1.3

Tony
9970175314

skap

Happy that you got it.

you are supposed to use Cross cable between modem to router WAN port. I guess you use straight cable, thats the reason why your packets are not routed to modem when you connect it in WAN port.

If you get cross cable then you can connect your modem in WAN port.

fernac0a

Thanks SKAP.

I guess that explains why the same arrangement worked well at my abode in Saudi Arabia and failed in Goa.

Appreciate the added info.

And I thought the LapLink serial cable was the only one crossed for transferring files betweem 2 PCs.

Hope I can be of help some day.

Tony
a.f.c.fernandes@gmail.com

skap

You can use either your router or modem as DHCP Server. If you want to enable DHCP in modem, first cross check with router that DHCP is disabled. Then access your modem through http://192.168.1.2 and ensure that DHCP server is enabled. Now assign a static IP to router in same segment of modem. You need to do an additional configuration. Configure Relay Server option in router and specify Modem’s IP(192.168.1.1) in it. This allow Router to relay DHCP packets to modem orelse router may discard DHCP packets.

just4kix

Every ADSL modem has a built-in router also. And every router has a DHCP service. The job of DHCP is to assign unique (internal) IP addresses to the networked devices connected to it. This happens if the DHCP service is enabled. If the DHCP service is disabled then you must manually assign IP addresses to all the networked devices.

When you add another router to the network, this adds another DHCP service layer. Now we have the following options:

a) Original modem/router with DHCP on : New (wireless) router with DHCP off
In this case the new router acts as a network switch. You must connect the the two routers by using the one of the LAN 1~4 ports of the new router and not the WAN/internet port.

b) Original modem/router with DHCP off : New (wireless) router with DHCP on
Same connection as above but You must assign a static IP address to the new router.

c) Original modem/router with DHCP on : New (wireless) router with DHCP onThis is the most preferred option but the IP addresses of both routers must be on a different subnet. If the main (old) router has the IP address as 192.168.1.1 then the new (wireless) router must have an IP address that is anything but 192.168.1.x. For example it could be 192.168.2.1.

__________________

skap

just4kix:
We can connect orignial modem in WAN port of new router. why not?
But few settings that we need to do are

a) Connect original modem to WAN port of new router using cross cable and not straight cable.

b) configure in new router settings for relay dhcp server to IP address of original modem. By default router doesnot broadcast dhcp packets, so we need to explicitly define this.

Also connecting in this method is the most preferred and secured method because when you connect in LAN port, each dhcp broadcast packet is transmitted to all LAN ports which is like creating unwanted traffic in new router and not secured.

A same is described by me here
How to connect Modem - Router - PC? | SKAPadmin - Administration in Security Perspective