Hi Nik,
You need to refer to the hardware guides here:-
https://docs.fortinet.com/product/fortigate/hardware
There doesn't seem to be a specific 30E guide- but essentially the lower end models all use the same convention:-
[ul]
Speed AMBER = 100Mb/sSpeed GREEN = 1000Mb/s[/ul]For example the 30D guide (the predecessor of the 30E) documents this convention.
Your "diagnose hardware deviceinfo nic wan" shows that too- the "Speed 100" agrees with what the AMBER speed LED indication is showing you.
Because your WAN interface is currently only 100Mb/s you will never get more internet speed than that.
So, if you have a 1Gb/s (1000Mb/s) internet connection (for example) you wont get more than 100Mb/s speed until the WAN link is also showing a "GREEN" Speed LED and your diag output shows "Speed 1000".
Common causes of getting 100Mb/s connection rather than 100Mb/s are faulty Ethernet cabling or perhaps negotiation/ speed settings between the Fortigate and the modem/ internet device.
Lastly, be aware that the 30E will not support full 1Gb/s (1000Mb/s) throughput. Have a look at the datasheet here:-
https://www.fortinet.com/content/dam/fortinet/assets/data-sheets/FortiGate_FortiWiFi_30E.pdf
Maximum firewall throughput is 950Mb/s and if you use full threat protection (which you should) maximum throughput is about 150Mb/s (depending on traffic type and mix).
Hope that helps you.
Kind Regards,
Andy.