Dual DHCP type wan's now? (cable modems)

Rimsey · Mar 2, 2009, 2:56 PM

Does PFsense support dual dhcp type wans now? e.g. I want to connect 2 cable modems.

thanks
Rim

PS I tried PFsense a long time ago and I think I had to drop it because it didnt support dual dhcp.

GruensFroeschli · Mar 2, 2009, 3:03 PM

You can have a second WAN as a DHCP client.
However what you cannot have is the same subnet and/or the same gateway on two WANs.

(although if you have two different gateways in the same subnet it would work but i dont think this is your problem :) )

Rimsey · Mar 2, 2009, 6:03 PM

@GruensFroeschli:

You can have a second WAN as a DHCP client.
However what you cannot have is the same subnet and/or the same gateway on two WANs.

(although if you have two different gateways in the same subnet it would work but i dont think this is your problem :) )

Thank you, does pfsense allow you to route between the 2 subnets?

thanks again

GruensFroeschli · Mar 3, 2009, 7:54 AM

Yes of course.
But if the clients in one of the subnets have another IP than the pfSense as gateway you will have to create a static route on their gateway.
(or enable RIP to exchange the routing information automatically, although i like static routes for this kind of setup better).

cheesyboofs · Mar 3, 2009, 9:16 AM

GruensFroeschli is of course completely correct, I was running two cable modems in DHCP mode but I found I was using static routes more and more. Then when one of the IP's changed it would screw it up. Not only that when a modem rebooted but not all the way I would get a link up but it would have a 192.168.x.x address and this would confuse things further. The most effective 'fix' is to bung a dirt cheep access point between each modem and turn its firewall off then you can set static IP's and add as many static routes as you like ;)

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