DHCP-request forwarding

[krooyv]

Hi.

I work at a cable company and we will let two different ISP's deliver their internet service to our customers. Both ISP's will use their own cable modems and their own DHCP server.

The DHCP requests sent by the cable modems must go only to the correct ISP or else the cable modem will be denied in the whole network.

I want to let cable modems get their IP-adress based on their MAC-address.

When a cable modem sends a DHCP request I need the request to be forwarded to a specific DHCP-server based on its MAC-adress.

What we think will solve our problem is a kind of relay or some forwarding agent who can analyze the DHCP-request, get the MAC-adress, make a query to a database and based on the MAC forward the request to the correct DHCP-server / subnet.

Is this something ISC can be set up to do? Or is it any other good solution?

Thanks,

Øyvind

 

[TechyMcSe2k]

This sounds like a Routing question and creating Access-Lists to help route MAC addreeses to the proper location. Try one of our Networking forums or contact the ISC.

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[ITPangaeaArchitect]

Agreed.

The easiest solution to this is to create two separate subnets off of each of these cable modems by either sticking a router in the middle, or an RRAS server. With an RRAS server, you can install a second and third NIC to connect to each network segment as well.

But this is definitely more of a networking issue here rather than a DHCP request forwarding issue.

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MCSE:Security00/03; MCSA:Security03
MCSA:Messaging00; MCP; A+
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