Need to Convert our LTM to VE

The problem is not the number of interfaces of the physical appliance but which one are in the configuration.

The VE use interfaces Mgmt, 1.1, 1.2 and 1.3 interfaces by default.

If in the 1500, you used SPF interface, named 2.1 in appliances, the configuration import will fail.

The best way to upgrade is to delete configuration of NIC in the 1500 appliance before backup (remove Interfaces in VLANs, trunk and spanning tree configuration). there is no need to modify Self IP configuration.

When it is not possible, import the configuration with errors. (Unsupported method, be sure you do not change config file format) after import, edit big.local file and remove part of configuration generating errors, and try to load configuration with:

tmsh load sys config