The h1.4xlarge instances are meant to be 10gbps capable but when I check in windows it shows a 1gbps. There seems to be no config i can set on the eni, subnet or vpc to adjust this.
Anyone have a clue? Windows 2008rs SQL Server 2008rs
Check it. Really.
The shown network speed in a VM may mean nothing. Hyper-V for example does the same - every virtual network adapter is a 1gbit adapter. Regardless how fast the physical network is. BUT: It can run at higher speeds than 1gbit. Just the "emulated" hardware never changes.
AMazon may be the same - they SHOW 1gbit but you can transfer faster. Try it out.
Adding on to TomTom's response, this also depends on the following condition: "Instances launched into the same cluster placement group are placed into a non-blocking 10 Gigabit ethernet network"