BSD and carp take 2

[Alex Bligh]

--On 20 January 2012 17:19:39 +0100 Ondrej Zajicek <santiago at crfreenet.org> 
wrote:

> If i understand it correctly, CARP is implemented in a way that create
> a new virtual iface, which depends on some real iface, which may or may
> not have an IP address, while VRRP implementations on Linux just add
> or remove shared IP address on already existing iface. Is that true?
> So these VRRP interfaces probably would not need anything like this.

I think that may depend which carp. ucarp on Linux doesn't. It simply
runs a usermode check over one interface, selects a preferred interface,
and calls scripts which can do stuff (including up/down other interfaces).
There is no additional virtual interface per se.

-- 
Alex Bligh