[openfabrics-ewg] Re: DHCP modifications for usage with IPoIB

[Hal Rosenstock]

On Mon, 2006-04-24 at 13:43, Doug Ledford wrote:
> On Mon, Apr 24, 2006 at 04:39:50PM +0300, Moni Levy wrote:
> > All, 
> > 
> >     we've made some work on making the ISC-DHCP package work with IPoIB,
> > basically we took an old patch based on ver 3.0.2 of the package
> > <http://article.gmane.org/gmane.linux.drivers.openib/9191> and updated
> > it to the latest version. Attached is a tar file containing the
> > following:
> > 
> > 1. The dhcp-3.0.4b2 is the DHCP client/server program patched to support
> > IP over IB (IPoIB) protocol.
> > 
> > 2. The dhcp-3.0.4b2.orig is the original version without IPoIB support.
> > 
> > 3. dhcp-3.0.4b2_ipoib.diff - is the patch file including differences
> > between the dhcp-3.0.4b2.orig and dhcp-3.0.4b2 versions.
> > 
> > 4. dhcp-3.0.2_ipoib.diff - is the original Hal's patch.
> > 
> > The program was tested with linux kernel version 2.6.15 and most
> > probably requires 2.6.14 or later.
> 
> Why 2.6.14 or later?  What's missing from earlier kernels that the patch
> relies upon?
> 
> > During the port of the patch we had to fix few minor conflicts. We also
> > had to disable the LPF support in order to be able to compile the new
> > version. We sure have to polish the patch more in order to have the LPF
> > support back but I want to understand if anyone is interested in that
> > effort and if there are any intentions to include DHCP support for IPoIB
> > in the distros and/or  the next OFED version,
> 
> I would love to enable dynamic IP allocation in our distribution.  However,
> in order to be truly workable, not only must dhcpd and dhcp-client be
> modified to support this, so must arping and right now it no longer
> segfaults, but it doesn't get correct MAC address from the kernel for
> sending out on the wire so that would have to be fixed too.  I'll look over
> this patch, especially since the dhcp client part needs to be able to get
> the full, correct 20 byte MAC address and see how hard it would be to
> implement that same method in arping.

I have a fix for arping.

-- Hal

> > more than that I would be
> > happy to see Doug and Moiz more involved in the OFED related
> > discussions.
> 
> Sorry, but I haven't been subscribed to the right list evidently.  I just
> sent a subscription request for this list through.  However, I've got a lot
> of projects on my plate for the next deadline, so I'm really behind in
> reading list email.  If you want my input, please Cc: me directly.