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2003 Apr 25 14:39

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Re: [vox-tech] disabling dhcp at startup
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Re: [vox-tech] disabling dhcp at startup


I am running RH8 and I had the opposite problem. When ifup would test for a cable connection, it wouldn't find one and quit, even if my laptop was in fact connected. Interestingly enough, I do not experience this proplem with other machines.

Although I know next to nothing about shell scripts, I took a look at ifup and found these lines:

# if check_link_down ${DEVICE}; then
# echo $" failed; no link present. Check cable?"
# ip link set ${DEVICE} down >/dev/null 2>&1
# exit 1
# fi

When I comment out this part (as pasted above), it is able find an IP address by DHCP, and my network connections works just fine. If I am not connected, however, my system does hang for about 1 minute at the ifup step, but eventually times out and fails the network connection appropriately.

I wonder if you could insert this in your ifup, or if you could just use the RH ifup directly?


Jeff Newmiller wrote:
On Fri, 25 Apr 2003, Charles McLaughlin wrote:


I'm new to debian, so bare with me. ;-)

bear, perhaps :)

My laptop currently gets an IP address via dhcp while the system starts
up.  This can be annoying if I am not connected to an ethernet cable,
because it stops the entire boot process until I press ctrl+c.

How can I disable the system from getting an IP address at startup?  I'd
rather just run dhclient manually once the system is up and running.

Edit /etc/network/interfaces to comment out the "auto eth0".

To manually bring it up and take it down, use "ifup eth0" and "ifdown

Better yet, it would be nice to have the system get an IP address at
startup but detect if the cable is not connected.  I stole that idea from
red hat 8.

I don't know how to do that.  Does seem like a good suggestion for the
ifupdown maintainer.

Jeff Newmiller                        The     .....       .....  Go Live...
DCN:<jdnewmil@dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live Go...
                                      Live:   OO#.. Dead: OO#..  Playing
Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
/Software/Embedded Controllers)               .OO#.       .OO#.  rocks...2k

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