Yes I am trying to configure an IP alias on the loopback interface that 
I do not want to broadcast arp responses for. By listening on eth0 it 
shows that the NOARP flag is being ignored and that the loopback is 
responding to arp requests.

Alex Efros wrote:
> Hi!
>
> On Mon, Oct 15, 2007 at 04:13:01PM -0500, Jeff Rooney wrote:
>   
>> # ifconfig lo:1 10.10.10.116 netmask 255.255.255.255
>> # ifconfig lo:1 -arp
>> # ip link set lo:1 arp off
>> # ifconfig lo:1
>> listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
>>     
>
> I've no idea about disabling arp, but you try to configure loopback and
> then listen on eth0... :)
>
>