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2 TL-R600VPN units; trying to emulate one network on same subnet

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2 TL-R600VPN units; trying to emulate one network on same subnet

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
2 TL-R600VPN units; trying to emulate one network on same subnet
2 TL-R600VPN units; trying to emulate one network on same subnet
2013-06-05 09:52:47 - last edited 2021-08-21 03:31:10
Region : UnitedStates

Model : TL-R600VPN

Hardware Version : V1

Firmware Version :

ISP :

I have a two TL-600VPN units that I'm trying to connect together over a VPN IPsec tunnel. At site "A" my local network is 192.168.1.x and subnet is 255.255.255.0. At site "B" I have another device that needs to be on the exact network 192.168.1.x subnet 255.255.255.x. I do not have a problem with getting the tunnels up if I setup one site as 192.168.1.x and the other at 192.168.2.x but I cannot figure out how to make the 2 tunnels work on the same subnet. I was hoping that I could just add MAC addresses into the address reservations to get this to work and avoid conflicts.

Basically, I have a device at Site A that is looking for a box at site B on the same subnet. I do not have the ability to change the settings in the devices that are on the network. They use DHCP and expect to find each other on the same subnet.

Any help would be appreciated.
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#1
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4 Reply
Re:2 TL-R600VPN units; trying to emulate one network on same subnet
2013-06-05 17:47:30 - last edited 2021-08-21 03:31:10
if you set two subnet with same IP segment, can they connect to each other ?
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#2
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Re:2 TL-R600VPN units; trying to emulate one network on same subnet
2013-06-05 21:29:33 - last edited 2021-08-21 03:31:10
I'm not a network engineer by trade, so please be patient with this "newbie"

With that being said, I think I tried every combination of subnet mask without luck. At the moment, my site "B" web UI is not responding so I'm stuck. It will be a couple of days before I'm in a position to reset the box.

Is there a way that I could use natting to force 192.168.2.x Site A traffic over to 192.168.1.x?

Everything I tried would not let the tunnels come up with both sites essentially trying to be the same network so to speak.
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#3
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Re:2 TL-R600VPN units; trying to emulate one network on same subnet
2013-06-12 21:04:46 - last edited 2021-08-21 03:31:10
That's not going to work. Each site needs to be on a separate/different subnet.
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#4
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did you get this working?
2013-08-22 07:40:37 - last edited 2021-08-21 03:31:10
Did you get this working yet?

It is correct that you must use different subnets at each site like 192.168.0.x and 192.168.1.x

The reason that you can't have the same network on each office is there would be nothing for the router to translate and route if they are the same.

Possible quick fix (I haven't tried this with this product yet) - you can try opening up the subnet mask to 255.255.0.0 on the systems that need to see each other and use the actual remote addresses.

If that doesn't work you should set up NAT translations
reserve a local address (out of your DNS range) for the remote site device(s)
make the remote device(s) address fixed (again out of your DNS range)
An example is to have DNS ranges on both locations of 192.168.x.100 with 50 available addresses
then set your remote server/device to 0.200
make local address 192.168.1.200 forward to 192.168.0.200
then set your local network device to use the 192.168.1.200 and it should translate to 0.200 at the distant office.
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