Re: ifconfig: side effects of new lladdr feature

[Claudio Jeker <cjeker_(_at_)_diehard_(_dot_)_n-r-g_(_dot_)_com>]

On Tue, Apr 05, 2005 at 03:43:28AM +0200, Andreas Bartelt wrote:
> Claudio Jeker wrote:
> >On Mon, Apr 04, 2005 at 01:40:06AM +0200, Andreas Bartelt wrote:
> ...
> >>(IP was not changed in the following example)
> >>example: #ifconfig fxp0 192.168.1.5 netmask 255.255.255.0 lladdr 
> >>11:11:11:11:11:11
> >>
> >
> >
> >This is a (broken) multicast ethernet address and so getting strange
> >results needs to be expected.
> >
> 
> Thanks, this explains the weird behaviour. Is it because the second 
> number from the left isn't even? Or is there another reason why it's 
> classified as multicast?
> 

Yes multicast addresses are specified to have bit 0 of the first octet set
to 1. In your case 0x11 has bit 0 set and is therefor a link layer
multicast address. A check was added so that it is impossible to set a
multicast ll2 address.

-- 
:wq Claudio