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Routing 192.168.0.x <--> 192.168.1.x Home LAN Netgear/Linksys

Posted on 2009-05-12
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Last Modified: 2012-05-06
Hi All,

I have someone who has a home network with their gateway being a Netgear ADSL DG834GT.  They are also using a Linksys WRT54GR as an additional access point/switch.
Currently the Netgear is on 192.168.0.1 and Linksys on 192.168.1.1  Ideally I would like the Netgear 0.1 to provide DHCP to all clients however the Linksys seems to refuse to allow me to change its LAN address to be on 0.x Likewise the Netgear does not seem to want to move over to 1.x. So at the moment I have the DHCP on Netgear assigning the Linksys a 192.168.0.2 and the Linksys assigning 1.x IPs to its clients which can commnicate back with the Netgear via the 0.2 IP it has assigned by the Netgear.  Any clients on 0.x are unable to communicate with clients on 1.x (which includes external traffic which I could otherwise route in via NAT),

Is there any kind of routing I can do to allow these two subnets to communicate with each other or does anyone know the trick to successfully change the IP on these?

Any help appreciated! It's one that's been bugging me for a while and I've tried all kinds of things to resolve, but not got anywhere so far!
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Question by:Stuart Oram
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bsohn417 earned 200 total points
ID: 24368945
Can you make linksys act as DHCP client relay?
This should allow netgear to act as DHCP server and Linksys to pass the DHCP request to client.

You will also need to reserve and IP add for linksys on the netgear router (Exclude this IP from DHCP Range)
Linksys configuration.
Setup - Basic Setup - Disable DHCP server.

in this case you will have one dhcp server and there will be no need to add static route.

http://www.retrevo.com/support/Linksys-WRT54GR-Wireless-Routers-manual/id/421ci077/t/2/
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by:Stuart Oram
ID: 24369979
I think I've tried this before, but I'll give it another go when I'm next there - probably some time next week - and report back....
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Assisted Solution

by:inbox788
inbox788 earned 200 total points
ID: 24377916
The easiest way to achieve what you want is change IP address on Linksys, but this involves upgrading the firmware with a version that's not publicly available. You will likely have to contact Linksys for version 1.11 firmware for your router.

http://forums.linksysbycisco.com/linksys/board/message?board.id=Wireless_Routers&message.id=69800 (also see page 2)

Apparently there's also a version 1.1 of your router in the EU, which you probably don't have, but in case you do, there's supposedly a 1.18 version of the firmware for that model.

http://www.fabiovisentin.com/33_5/default.ashx

You really got unlucky matching up two defective routers that can't change IP addresses, but at least fixing one should help resolve your problem.

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Assisted Solution

by:jcodding
jcodding earned 100 total points
ID: 24381272
The other thing you might be able to do is change the subnet mask of the network to be 255.255.254.0. That would essentially make the usable IP space span from 192.168.0.1 - 192.168.1.254.
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Author Comment

by:Stuart Oram
ID: 24421050
All - Just a quick note that I haven't forgotten this one, just not been back to site to try it yet.
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Author Closing Comment

by:Stuart Oram
ID: 31580715
Removed the offending Linksys from network in the end and used a plain switch I had made spare!
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