Re: Ipv6 and preferred_lft

* Alexandre Cassen

> Provide a patch (maybe I just missed this one) and I will be more than
> happy to merge it mainline.

A suggestion to whomever picks up the ball...add support for the "nodad"
iproute parameter to add the address without triggering the Duplicate
Address Detection algorithm.

Using the nodad flag has the following benefits:

1) The address becomes immediately usable after they're configured.
2) In the case of a temporary layer-2 / split-brain problem we can avoid
that the active VIP transitions into the dadfailed phase and stays there
forever - leaving us without service. HA/VRRP setups have their own
"DAD"-like functionality, so it's not really needed from the IPv6 stack.

Tore

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