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Two different Subnets over one modem

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Anonymous (not verified)
Two different Subnets over one modem

Hello,
We are providing a village in Austria (Europe) with cable internet.

We are looking forward to set up following situation.
We want to tell the headend (3com), that over one cable modem two different computers should be provided with to different subnets.
Computer a should get an ip with 194.208.52.x with the gateway 194.208.52.1 and computer b should get 192.168.5.x with the gateway 192.168.5.1

Both computers should work behind the same modem and should get different ip nets.

Is such a configuration possible at all?
Do you know anybody who perhaps already configured the headend like that?

Thanks for your help in advance.

Sincerely
Arthur Moessmer

astrit
Two different Subnets over one modem

As you may know the Cable Modem is a bridge device, and doesn't care what subnet you are using behind it. Just configure those two different subnets in your DHCP server and you're done. Allso you may set the static entrys in your DHCP server for the PCs MAC addresses.

Anonymous (not verified)
Two different Subnets over one modem

Thank for this advice. But we are thinking now about two dhcp server in one docsis hf.
This is because of following reason:

We are planning to run a hotspot system over the same docsis, and we do not want to reconfigure the original dhcp (linux) server with new subnets.

Therefore we are planning to install a second dhcp server which only responses to the ARP requests from the hotspots (mac adresses).

The original dhcp server only serves ip adresses to the mac adresses of the customers which are entered in the database.

I think if this is done well, the two dhcp servers would not have troubles which each other.

Do you think that this could work, or might there be some other problems???

Thank for your replies!!!
Arthur

astrit
Two different Subnets over one modem

In one of our sites we do use two DHCP servers in one broadcast domain, but we are setting static address for every PC behind the CM.

astrit
Two different Subnets over one modem

Sorry If I was not clear enough; with static addresses I meant static entries of MAC addresses and IP addresses in DHCP servers.