Hi Darren,

I think there's a potential panic in ipif_down(). In the case where we send an NE_DOWN event we hold the ill_lock so if a callback gets run that does something like net_getifname(), this will call ill_lookup_on_ifindex() which will take the ill_lock and we'll get a recursive mutex enter panic. Maybe this is just something you're not meant to do but it seems reasonable that on receiving an NE_DOWN event you might want to lookup the name of the nic.

Phil
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