On (04/22/09 11:18), Peter Memishian wrote:
>  > > wanted to also get rid of the administrative-enable/disable-address knob
>  > > altogether (partially on the grounds that other Unix variants don't have
>  > > it, and partially on the grounds that it's more complexity).  I think
>  > 
>  > Yes, and that's a valid argument in defense of interface enable/disable.
>  > For example, routing daemons like quagga already have code to deal
>  > with interface up/down notifications, and have historically had to
>  > maintain special code to deal with the "address up/down" state.
> 
> Except that such code will still be needed to correctly deal with an
> address that fails DAD -- which is my earlier point: you end up removing
> flexibility without being able to actually simplify the architecture
> because the state inherently exists.

If an address fails DAD, then you should be in the same state as the
case when you have IFF_NOLOCAL set, esp for the particular case
in point (routing daemon dealing with DAD failure). Why do we need an
additional address-up flag for this?

--Sowmini

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