[gentoo-user] Re: dhcpd uses fake MAC address

[Nikos Chantziaras <realnc@arcor.de>]

Joshua Murphy wrote:
> On Wed, Oct 29, 2008 at 6:49 AM, Mick <michaelkintzios@gmail.com> wrote:
> <snip>
>> More sophisticated routers allow you to set up on their CLI static LAN IP
>> addresses using the DUID string, instead of the client's MAC hardware
>> address.
>>
>> Previous versions of dhcpcd had the vram USE flag which copied the hardware
>> address into the DUID string and the dhcp servers would happily recognise the
>> original network device, while using the DUID string.  Now the vram flag is
>> gone.  Therefore, if you cannot set up static IP addresses with your router's
>> CLI using the client_indentifier string (like e.g. on Cisco and
>> Adtran/Netvanta routers), the only other solution would be to set it on the
>> client side.  That's an inconvenient solution if you have a laptop which
>> connects to all sort of networks with different LAN IP addresses/ranges.  In
>> that case you may have to run ifconfig and route manually each time you
>> connect to a network.
> 
> Or, actually, you could just give in and use a different dhcp
> client... one more forgiving of less RFC compliant servers.  Just
> winging an admittedly untested idea... try "busybox udhcpc" and see if
> it gives you the right IP... and if so, try emerging net-misc/udhcp
> (different from BB's built in, but it's worked in all the same places
> as BB's has for me, which includes some very cheap routers) and
> setting your conf.d/net to use it over other clients. ( modules=(
> "udhcpc" ) )

I just did this and everything is OK; the MAC address is correct. 
Booting is also faster by about 8-10 seconds (dhcpcd needed about 10 
seconds to get the IP, udhcpc gets an IP instantly.)

And no, my router isn't broken.  Quite the contrary; all the Ciscos and 
Netgears and whatevers developed problems over time.  My old trusty 
Thomson SpeedTouch just keeps walking for ages, running 24/7 for over 5 
years :)