conflicting command line options and dhcp.conf statements

Andrew Pollock apollock at
Wed May 17 03:25:10 UTC 2006

On Tue, May 16, 2006 at 02:02:15PM -0700, Ted Lemon wrote:
> On Tuesday 16 May 2006 13:43, Andrew Pollock wrote:
> > I know of multiple people who get extremely cranky about dhclient's
> > behaviour where it ignores interfaces on the command line in favour of
> > interfaces mentioned in the config file.
> I know of people who get cranky when the sun rises.   But in fact the problem 
> you're describing is largely the result of a vast difference between the 
> design philosophy with which I originally wrote the client and the design 
> philosophy of the ifup and ifdown scripts.
> In the context of those scripts, of course it's a horrible botch that the 
> command line doesn't override the configuration file, but it was never my 
> intention that the DHCP client should be started and stopped on a 
> per-interface basis, nor that there ever be more than one instance of it 
> running at a time anyway.
> I say this not to indicate "so it's not a bug," but merely to point out that 
> there's a reason why it's that way - it's not an accident.
> BTW, since you're here, do you have any clue why the kernel won't receive 
> broadcasts to when the interface has a zero IP address?

No, but I put David in touch with Rusty Russell, who might be able to help
shed some light on the matter...



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