creating taps cause network flap, broadcom don't

P

paw

I have two servers, one with intel (igb) and one with broadcom (bge).

Server1: Intel(R) PRO/1000 PCI-Express Network Driver
Server 2: Broadcom NetXtreme Gigabit Ethernet
Version: FreeBSD 12.2-BETA1 FreeBSD 12.2-BETA1 r365618 GENERIC amd64

I've setup a bridge for bHyve however whenever I start a new Virtual Machine on the server with the Intel chipset, I get brief network flap

Server 1:
igb3: link state changed to UP
tap0: link state changed to DOWN
igb3: link state changed to DOWN
igb3: link state changed to UP
Click to expand...

Meanwhile with Broadcom, I don't
tap0: link state changed to DOWN
tap0: Ethernet address:
tap0: promiscuous mode enabled
nd6_dad_timer: cancel DAD on tap0 because of ND6_IFF_IFDISABLED.
tap0: link state changed to UP
Click to expand...

Anything I can do to diagnose this further?
 
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