[vox-tech] disabling dhcp at startup

[Jonathan Stickel]

Charles

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?

Jonathan


Jeff Newmiller wrote:
> On Fri, 25 Apr 2003, Charles McLaughlin wrote:
> 
> 
>>Hi,
>>
>>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
> eth0".
> 
> 
>>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.
> 
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