@itestandroid
You can have whatever MTU you wish on your LAN, as IP is designed to work over different MTU, provided everything thing on a subnet is at the same MTU. Fragmentation (IPv4 only) and Path MTU Discovery (PMTUD) will be used fit the packets to a MTU. However, if you can manage 9000 on your LAN, then that would be best. However, you won't be able to use WiFi on that LAN as it supports a maximum MTU 2304 bytes. Also, where is your LAN compared to the data centre? If you have to connect to it via the public Internet, then you're still going to be limited to 1500. I believe Internet 2 supports 9000 MTU.