Allied Telesis SwitchBlade 4000 Series Switch Hardware Reference - Manual (Page 29)

Hardware Reference 29
C613-03060-00 REV H
Note: The suffix V2 indicates the card's silicon revision level. Certain enhanced
features, such as LACP, will only run on cards with a V2 revision level. You can also
display the silicon revision of a line card by executing the show switch instance
command (V2 revision level cards are displayed as K1). Refer to the Switching Chapter
of your SwitchBlade Software Reference for more information on using this command.