What roles are enabled on your server (VM)?
How much RAM is allocated to the VM.
Are you going through a (hardware) firewall?
Does that server have a public IP address? (is the 212.... address shown in wireshark the VM?)
What ports are involved?
I have a VM running SBS 2011, it has the Exchange server role enabled, the DNS server role enabled, DHCP role is disabled (avoid conflict with VPN firewall), Sharepoint and Web server (IIS) enabled.
It generates a lot of traffic. It does bog down for a few minutes, but only when booted up.
You might want to disable roles one at a time if you have a lot installed.
Lou
"The trouble with children is that they are not returnable."