Hello

I have a single small doubt about DHCP, and I'd like to know if someone can clear me out.

DHCP is a system that allow hosts to achieve an IP address, netmask address, DNS address, Gateway address automatically, as previous configured in a server, so far that's what I know.

The question is: If I have two or more network interfaces into a single host, and I plug a DHCP server in all of them (or all in the same DHCP server), and I configure the interfaces to acquire address via DHCP , will all the interfaces do it?

Why do I ask:
I have a Slackware 10.2 with 4 network adapters (1 onboard, 3 offboard) and mysteriously only eth0 (onboard) get's the configuration from the DHCP. If I plug any of the other 3 eth's, they won't get the configuration from it.
As a small test, I manually configured them and they worked fine when comunicating with other computers.

It appears that this violates the RFC
why would you want all your interfaces in the same network? may confuse the host on how to get to a destination.

Actually my situation is:

I have two ADSL routers, each connected to one of network adapter of that host (ADSL 1 connected to eth0, ADSL 2 connected to eth2, eth1 and eth3 are connecting two internal networks). The idea is to create redundance and link balance (probably not the best idea, but that's all with the resources I have).

Each ADSL router has an internal DHCP, but:

- Connecting ADSL 1 or 2 to eth0 grants it a network configuration (IP, mask and so on).
- Doing the same with eth1, eth2 or eth3 (even if I connect only one of them, leaving the other 3 with nothing connected) the don't get the configuration from DHCP, it's like they can't reach the DHCP server.
- I already tested eth1/2/3 with manual configuration, and it worked fine when connecting to my internal networks.

So, that's my problem...

Well, what can I say.
When I tried this morning, ta-da, it worked. Most probably a problem with my internet provider :P

Sorry for any inconvenience