Who controls your router and what is the general form of the connection to the internet? Can you ping both interfaces of the router without this delay?
We have a LAN network with mixed machines, mainly running windows. The net is linked to internet via an common ADSL router (I mean Ovislink, I’ll verify). I can ping it with typical LAN resonse time (local interface). I have to try the WAN interface.
This problem is exclusive of the 11.1 installation. It doesn’t happen with Windows machines.
I suspect that there is a running process that blocks network for a while, don’t know if as a collateral effect.