Property:ETH speed capability

This property is of type Has type::text.

It allows the following values...
 * Allows value::0 (unspecified / invalid value)
 * Allows value::10MbE
 * Allows value::100MbE
 * Allows value::1GbE
 * Allows value::2.5GbE
 * Allows value::5GbE
 * Allows value::10GbE
 * Allows value::20GbE