On 2 Jun 2012, at 20:04, Petter Reinholdtsen wrote:

> 
> [Michael Tokarev]
>> Peter, can you give some more details please, maybe some hints on how
>> to setup the test environment / dhcp server?
> 
> Sorry, I do not have more details any more.  If I remember correctly,
> the problem was with installing Debian on virtual machines where the
> installation environment only provided one IP address to the virtual
> ethernet and used this to set the IP using DHCP.
> 
> Probably better to ask Conrad Wood for more details. Cc to him.
> -- 
> Happy hacking
> Petter Reinholdtsen
> 

Hi Petter,

In some "cloud" environments, including ours, we configure an ethernet device 
with a single /32 IP Address. Say, for example 5.6.7.8/32. The Default Gateway 
is, for example, 9.10.11.12. The linux kernel and BSD happily work as desired 
and send out an arp request out of the ethernet device and route _everything_ 
to the default gateway. 
Configuring this manually is straightforward and works as desired.
Using the ISC-DHCP client also works as desired. It picks up IP, Netmaks and 
gateway perfectly well.
However, in the installer, with the busybox dhcp client, it stalls and claims 
it is unable to configure the network interfaces. Anything _apart_ from /32 
(say /31, /30 etc.) works ok. But then the gateway won't be reachable, as the 
kernel then tries to do 'propper(?)' routing instead of just forwarding the 
packets.
Please let me know if you need more information. I can provide a remote console 
to a Virtual Machine where this problem is reproducible, if that helps.

Conrad 










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