In 6.7.x below 18.104.22.168 the show interface command does not show the MAC address of the interface.
In SGOS 7.4 the "show Interface" command will show the MAC address. However in SGOS below 22.214.171.124 and the lower versions of SGOS 7.3 the show interface command does not show the MAC address.
To view the MAC address on the CLI we need to use the below command:
Proxy# show advanced-url /diagnostics/hardware/info
To view MAC address from the GUI we need to use the below advanced URL in the browser: