Create Date: Sep 7 2013 2:04AM
There's no per-port MAC address. Extreme switches have only one System MAC address. You can see the switch's System MAC address using the SHOW SWITCH command.
....
SysLocation:
SysContact: support@extremenetworks.com, +1 888 257 3000
System MAC: 00:04:96:26:6B:EC
System Type: X450a-24tdc
.... (from Daniel_Flouret)