Re: got an error while configuring Vlan interface
Welcome to the forums.
Some things to check for:
Did you try Wireshark to see if there are any errors?
Is the entire path between the end device and the FGT configured correctly (trunks defined and access ports all OK)?
Is the DHCP server properly configured on the correct VLAN?
If you give the device a static IP on that segment, do things route successfully? If so, the problem can be traced down to the DHCP side, not the network configuration.
Hope that helps.
-Bob - self proclaimed posting junkie!
See my Fortigate related scripts at: http://fortigate.camerabob.com