Two Adapters with the Same IP Address

[vraeden]

I have a home network with a machine running dhcpd and a laptop that has both a wireless and a wired connection. How do I configure dhpcd to give both adapters the same IP address? I searched and searched and couldn't determine if it was possible.

Thanks

[jmbsvicetto]

Hi.

If I understood your question correctly, you want to know how to tell ISC DHCP to handle the same ip for two different cards, right?
You can try to do that by using reservations and using the same IP address for the MAC addresses of the two nics. I just don't know if DHCP won't complain about that. Furthermore, you're probably not going to like what will happen to your network if you have your two cards with the same IP address working at the same time. However, if ISC DHCP lets you use this configuration and you never use the nics at the same time, it should be work.
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Jorge.

Your twisted, but hopefully friendly daemon.
AMD64 / x86 / Sparc Gentoo
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[robdd]

Can you explain why you want both adapters on the machine to have "the same IP address", and what your network setup is ?

I *think* you can actually configure two network adapters on the same box to have the same IP, but then you run into all sorts of routing problems if they are connected to the same network. Say your local net is 192.168.1.xxx and your IP for both adapters on the laptop is 192.168.1.100 - then if you want to send a packet to 192.168.1.1 how does your laptop's poor kernel decide which adapter to send the packet to ? It will probably always pick one of the adapters so you won't be able to use the other.
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Rob Diamond
Gentoo Hack, hack, hacker
Sydney, Australia

[stickboy2642]

Correct me if I am wrong, but if you try and run them both at the same time with the same IP, won't the kernel complain?
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