>
> If you are having connectivity issues on your External Hyper-V network
> such that only one host can communicate at any given time - then check
> for port-security on the physical switch that your host is using with
> the Hyper-V virtual switch.
>
> I researched this issue for some time with most answers and
> documentation simply stating that you need to define an External
> network.
>
> But my Cisco switch had port-security enabled so that only one MAC
> address could use the port. I'm sure other managed switches will have
> similiar features. According to the network engineer that installed
> that switch, this was the Cisco default configuration - something I've
> not seen before as default.
>
> I'm posting this because I hope I can help someone else. There's
> another post here, with similar subject but multiple responses. At the
> bottom was the answer that resolved an issue I'd worked with for two
> weeks. Maybe I can make it easy for someone else.
>
>
> --
> taoteching