It's basically the same as you would set it up on any other switch. Configure the port to be used:
interface Ethernet 1/__
description _________
switchport monitor
spanning-tree port type edge
spanning-tree guard root
Then configure the monitor session:
monitor session 1
description ________________
source interface Ethernet1/___ both !!! <- indicates bidirectional traffic
destination interface Ethernet1/___ !!! <- the port you configured in the previous step
no shut
