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256 posts

Ultimate Geek
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# 10578 29-Nov-2006 22:00
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Routers/Networking is not my thing so I need help please

I have a Dynalink RTA 1320 modem: Admin area = 192.168.1.1

I connect it to my Linksys Router / 4 port Switch (BEFSR41)Admin area = 192.168.1.1 to it and run the setup CD. Doesn't work.

Now the problem could be that both the router and modem share the same network address 192.168.1.1.

I have tried changing them both seperately wiht no luck.

Both units work ok on their own or with other units, but it is this configuration that I need. Any tips on what to do, how to set it up??


I know the modem supports bridging but I am completely lost on this, and how to set it up.


Any help is appreciated

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871 posts

Ultimate Geek

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  # 54227 29-Nov-2006 22:22
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Try unplugging the modem from the LAN and seeing if you can change the IP the router gives itself Wink



256 posts

Ultimate Geek
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  # 54228 29-Nov-2006 22:24
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It assigns 192.168.1.2 to the modem, but once it does that I can't log into either of them and I have no connectivity to the internet

 
 
 
 


3539 posts

Uber Geek
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  # 54230 29-Nov-2006 22:33
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Cjmchch,

I will explain it slowly, one step at a time:

1)  Connect the RTA1320 modem to your PC using a network cable (nothing else on the network at this stage).
2)  Log in to the RTA1320 at address 192.168.1.1
3)  CHANGE the RTA1320's address to 192.168.0.1 and Reboot it
4)  Your PC will now have lost the connection to the RTA1320 so change the IP address of your PC's network adapter to 192.168.0.2
5)  Point your web browser to 192.168.0.1 and check that you can access the RTA1320
6)  Set your modem to Bridge Mode and disable NAT
7)  Reboot your modem

So far, so good, you have correctly configured your modem and it should now display the ADSL or LCP light.
What you have achieved here is to put the modem on its own subnet (192.168.0.x) so there is no conflict with the subnet used by the Linksys (192.168.1.x).

8)  Disconnect the network cable from your PC (leaving the other end still plugged into the RTA1320) and instead, connect it to your Linksys Router's WAN port (this is most important, DO NOT connect it to any of the Linksys' LAN ports).
9)  Using a second network cable, connect your PC to one of the LAN ports on the Linksys Router
10)  Change the address of your PC's network adapter back to 192.168.1.x (whatever it was before)
11)  Point your web browser to 192.168.1.1 and you should be able to access the Linksys
12)  Set the Linksys to PPPoE mode and enable its WAN port to be assigned an IP address from your ISP
13)  You will also need to enter User Name, Password and possibly DNS servers
14)  Reboot the Linksys and it should connect to your ISP
15)  Finally you should have a connection to the Internet!

Phew, it takes much longer to describe it than to do it...

Quite possibly I've left something out here, but the important steps are covered I think.

Good Luck!



256 posts

Ultimate Geek
+1 received by user: 43


  # 54231 29-Nov-2006 22:37
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Thanks very much for that will try it now and see how I go!, Will let youi know

See you on the other side.................



256 posts

Ultimate Geek
+1 received by user: 43


  # 54245 29-Nov-2006 23:49
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Grant17: Cjmchch,

I will explain it slowly, one step at a time:

1)  Connect the RTA1320 modem to your PC using a network cable (nothing else on the network at this stage).
2)  Log in to the RTA1320 at address 192.168.1.1
3)  CHANGE the RTA1320's address to 192.168.0.1 and Reboot it
4)  Your PC will now have lost the connection to the RTA1320 so change the IP address of your PC's network adapter to 192.168.0.2
5)  Point your web browser to 192.168.0.1 and check that you can access the RTA1320
6)  Set your modem to Bridge Mode When I click on this it gives two options LLC/SNAP and VC MUX, which one do I choose?

and disable NAT What about DHCP?

In the DHCP area it says 'Configure LAN side Settings

Enter the ADSL router IP address and subnet mask for LAN interface and then enable DHCP server on LAN interface to provide IP address settings for your computers.

Primary IP Address:
Subnet Mask:

Configure secondary IP address and subnet mask

 

MTU: (Default: 1500)

 DHCP Server OnStart IP:  
 End IP:  
 Lease Time:    days    hours   minutes
DHCP Server Off

so what do I set it to please.


7)  Reboot your modem

Hopefully that will make it work.

So far, so good, you have correctly configured your modem and it should now display the ADSL or LCP light.
What you have achieved here is to put the modem on its own subnet (192.168.0.x) so there is no conflict with the subnet used by the Linksys (192.168.1.x).

8)  Disconnect the network cable from your PC (leaving the other end still plugged into the RTA1320) and instead, connect it to your Linksys Router's WAN port (this is most important, DO NOT connect it to any of the Linksys' LAN ports).
9)  Using a second network cable, connect your PC to one of the LAN ports on the Linksys Router
10)  Change the address of your PC's network adapter back to 192.168.1.x (whatever it was before)
11)  Point your web browser to 192.168.1.1 and you should be able to access the Linksys
12)  Set the Linksys to PPPoE mode and enable its WAN port to be assigned an IP address from your ISP (can't find this WAN setting in the router.
13)  You will also need to enter User Name, Password and possibly DNS servers
14)  Reboot the Linksys and it should connect to your ISP
15)  Finally you should have a connection to the Internet!

Phew, it takes much longer to describe it than to do it...

Quite possibly I've left something out here, but the important steps are covered I think.

Good Luck!


Once again thanks heaps for the help, much appreciated.

3539 posts

Uber Geek
+1 received by user: 125

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  # 54268 30-Nov-2006 09:22
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cjmchch: 6)  Set your modem to Bridge Mode When I click on this it gives two options LLC/SNAP and VC MUX, which one do I choose?

This is all a bit different from the Nokia M1122 that I successfully used this configuration with, so a bit of an educated guess here:  I would say to use VC MUX because VC (Virtual Channel) is the mode we use in NZ.

Make sure you set DHCP Server to Off

12)  Set the Linksys to PPPoE mode and enable its WAN port to be assigned an IP address from your ISP (can't find this WAN setting in the router).

In that case you will need to set your Modem to PPPoA mode and enter User Name and Password there.

13)  Reboot the Modem and hopefully it will connect to your ISP.
14)  Can you find the setting in your Linksys that enables its WAN port to be assigned an IP address from your ISP?
15)  Make sure that DHCP Server and NAT are enabled on the Linksys.
16)  Reboot the Linksys and it should connect to your Modem
17)  Finally your PC should have a connection to the Internet!

Good Luck again!



256 posts

Ultimate Geek
+1 received by user: 43


  # 54327 30-Nov-2006 17:44
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Still no luck here, I have placed a call to dynalinls help line to see if they can assist. I will update you.

I do appreciate your help thus far though.

 
 
 
 


Ben

317 posts

Ultimate Geek

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  # 54338 30-Nov-2006 19:11
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Couple of thoughts:
- I don't believe true 'bridge mode' is supported on Telecom's ADSL network (if you're in NZ).  You need to use half-bridge.

Try following the first part of my config guide here.  Ignore the second part for now, at least that will confirm that your RTA1320 is working OK in half-bridge mode.

Then it should just be a matter of plugging that in to the 'internet' port of your router, and setting the router to DHCP.



256 posts

Ultimate Geek
+1 received by user: 43


  # 54345 30-Nov-2006 20:19
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Finally, success!

Well rather bizarre as to how it has configured to work but it does and this is how I did......

I reset my Linksys Router/Switch back to factory and then reassigned it's IP to 192.168.0.1
This is the only change I have made from factory so DHCP is on


My ADSL Modem Router.....I reset it back to factory, set my login and password, NAT is on, DHCP is on and it is running PPPoA  connected to my WAN port of Linksys router.

Voila, I have internet on all three networked computers and they are all operating off the DHCP of the Linksys Router. If I turn off the DHCP of either the router or the modem I loose the connection so will play with that a little more.

Anyway, a huge thanks to you guys for the help, it has given me a lot of help in understanding how these work and without that help I wouildn't have got it going.

THANK YOU

Ben

317 posts

Ultimate Geek

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  # 54346 30-Nov-2006 20:28
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Hmmm interesting.  I wonder if the DHCP servers are buggering around with each other?
I'd highly recommend setting the modem into half-bridge mode, but if it's currently working and is temperamental, then don't touch it ;)

3539 posts

Uber Geek
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  # 54348 30-Nov-2006 21:20
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cjmchch: Voila, I have internet on all three networked computers and they are all operating off the DHCP of the Linksys Router. If I turn off the DHCP of either the router or the modem I loose the connection so will play with that a little more.

Great news!  Well done on getting it going and as you have found, there aren't any hard-and-fast rules with this kind of situation, you just have to play around and see what works and what doesn't.

It sounds to me like your Linksys Router is getting its Default Gateway and DNS Server addresses courtesy of the DHCP Server in the Modem.

And then the Linksys Router is in turn using its DHCP Server to pass those routes to the PCs on your LAN.  Hence you have connectivity to the internet.

The key thing here is that you have moved the Linksys WAN port onto a different subnet than its LAN ports, thereby avoiding any conflict.  Even though there are 2 DHCP servers running (which would normally clash) in this case they are on different subnets, so it doesn't cause any problems.

Ben's config. guide has a lot of useful information, particularly as it deals with the same modem you have.  Most of these modems and routers have similar functions (more or less).  But the manuals are often full of "Engrish" so it can be difficult to figure out the true meaning.  Good on you for persevering and getting it working Smile.



256 posts

Ultimate Geek
+1 received by user: 43


  # 54351 30-Nov-2006 21:29
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Ben: Hmmm interesting.  I wonder if the DHCP servers are buggering around with each other?
I'd highly recommend setting the modem into half-bridge mode, but if it's currently working and is temperamental, then don't touch it ;)


Ben,

I have just finished trying out your method and while it shows up on my Linksys router as being connected directly to the internet I don't have access to it.

I tried also with PPPoE, but as it was already connected to the net I didn't think it would work and it didn't. The only thing I didn't try was playing with the NAT on my Linksys, do you think that if that was disabled it would make it all work?

Ben

317 posts

Ultimate Geek

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  # 54388 1-Dec-2006 16:09
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Hey wow interesting. Are you on TelstraClear PDQ by any chance? I just switched from Xtra to Telstra last night, and found that my half-bridge setup shat itself :o

It seems that with Telstra, the modem's public IP and Default Gateway are on different subnets. Very weird. So the modem understands how to get to the Default Gateway, but when you do half-bridge, the PC doesn't know how to get there.  On top of this, as you noticed cjmchch, I couldn't even access the modem's web interface.  I managed to make it work direct from my PC by manually adding a default route.

However, when I plugged the half-bridged modem into my router, it Just Worked(TM). I was expecting to have to add the same route table entry on the router, but no. Perhaps the router and modem talk ARP at each other and get it sorted?

So yeah, if you're on Telstra, try half-bridging the modem, then plugging it into the router, and see if it works.

I'll have to write an addendum to my guide for Telstra users :o



256 posts

Ultimate Geek
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  # 54395 1-Dec-2006 16:58
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Yes I am on TelstraPDQ and in half bridge I can connect on the computer modem path no problem but as soon as I plug my Linksys in I lose my internet via the LAN.

And yes, the default gateway is on a different subnet.

I have spent the best part of today trying to get it all to work to no avail, even spent 2 hours on the phone to Linksys Support (which is in the Phillipines). Her answer, faulty hardware....and do you think I could get throught o her that bridguing is not an option in NZ. Her attitude is if the modem does it then it will work.

Anyway, I would love to find a way for it to work in half bridged mode.

369 posts

Ultimate Geek
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  # 55659 17-Dec-2006 08:38
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I've tried Half-Bridged Mode with my Dynalink RTA1320, but it seems the DHCP lease time of the external IP I get from Woosh is only 30 secs, and it's causing some problem for my wireless router (3Com 3CRWE554G72) as it doesn't renew it automatically, and it's like I'm disconnected from the net, as well as from my ADSL router.

Any ideas as to what I did wrong, or is there anyway I can get around this?

Edit: I tried connecting my PC directly to the RTA1320, and it seems the DHCP lease is still 30 secs, except I don't experience much of a disconnection coz Windows renews it promptly - although I do feel like my net is stuttering.

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