Re: npf and carp

[Brook Milligan <brook%nmsu.edu@localhost>]

On May 27, 2015, at 3:10 PM, Mindaugas Rasiukevicius wrote:
> Indeed, the traffic looks asymmetric.  The packet filters (not only NPF)
> see the outgoing packets on the physical interface.  It is reset here:
> 
> http://nxr.netbsd.org/xref/src/sys/net/if_ethersubr.c?r=1.209#222

Would this also cause routing loops?  I had tried setting up a router with a carp interface and ran into all sorts of routing issues.  I was not entirely confident that I had it configured correctly, but now I suspect the problems might have been because packets were being given different addresses than I expected and thereby confusing the rest of the network.  Is that a possible outcome of the way the network stack currently handles carp interfaces?

Cheers,
Brook