On Thu, 15 May 2008, mikeciaraldi wrote:
> I just took delivery of a TS-7800 with the latest Debian distribution
> from TS. The Ethernet port works fine with a static IP address, but
> not with DHCP.
>
> According to our network people, they can tell that the board is
> sending out a DHCP request, and that the DHCP server is sending back
> an IP address, but the board does not seem to recognize it.
>
> I called TS tech support, and they said that this is a known problem
> with the pump program (although actually caused by a kernel bug), and
> that I should download and use dhclient instead.
>
> I did that and can run dhclient. But it always gives me an error
> message saying that the interface is not up. Of course it is not up --
> it cannot come up unless DHCP is working!
Actually, the interface needs to be up to transmit and recieve packets.
DHCP provides it with an ip address by transmitting and recieving packets.
Hence, the interface must be up for dhcp to discover an address for it.
ifconfig eth0 up will bring it up with no address, which is what you want
for dhcp to work. ip link set eth0 up will do the same thing if you
prefer
iproute2 over net-tools.
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