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Re: removing carp(4)

> In sum, I doubt that carp(4) provides enough utility to justify its
> maintenance cost.  If there are arguments to the contrary, I am
> listening.

whatever difference that really makes) does involve a kernel element.
kernel device and interface is that you can attach config and
processes to a proper interface.

This behaves like an interface is expected to for all other purposes,
such as link state monitoring, routing daemons, bpf, ipfilter, passing
through to VM platforms (xen), etc etc.  Adding and removing an
etherstub (tun/tap) to a bridge might not preserve the desired
semantics in a predictable fashion for these corner cases.  A you've
already observed, it may work for ethernet but not so well on other
link types. It might not converge fast enough if there's some dynamic
bridge protocol (STP, TRILL) in use, either. 

So, I think there's a case for at least some of it to remain in


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