bhyve and arp problem

[Daniel Braniss]

> On 30 Mar 2018, at 18:44, Allan Jude <allanjude at freebsd.org> wrote:
> 
> On 2018-03-30 07:16, Daniel Braniss wrote:
>> hi,
>> this is my first attempt at bhyve, and so far all seems ok, except
>> in my guest, the mac address of the hosting keeps flipping, ie, every 20 minutes
>> i see a message :
>> 	… arp: nnn (the hosting ip)  moved from xxxx to yyyy
>> on both the host and guest I’m running a very resent -stable.
>> the yyyy is the mac of the host nic, while the xxxx is the tap0
>> 
>> i know this looks harmless, but it’s annoying
>> 
>> danny
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>> 
> 
> The MAC address is likely not changing. That sounds more like an IP
> conflict.


I think the problem starts with the host seeing the client/guest on 2 interfaces, the nic (mlnxen0) and the tap(tap0)
on the host:

arp -a
...
bhv-00.cs.huji.ac.il (132.65.80.246) at xx.xx.xx.xx.xx on tap0 expires in 1001 seconds [ethernet]
bhv-00.cs.huji.ac.il (132.65.80.246) at xx.xx.xx.xx.xx on mlxen0 expires in 644 seconds [ethernet]



> 
> -- 
> Allan Jude
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