Allied Telesis AT-S63 - Manual (Page 336)

Chapter 20: Denial of Service Defense Commands
336 Section II: Advanced Operations
You can use the MIRRORING parameter to copy the examined traffic to a
destination port mirror for analysis with a data analyzer. To define the
destination port, refer to “SET SWITCH MIRROR” on page 182.
Example
The following command activates the IP Options defense on ports 5, 7,
and 10:
set dos ipoption port=5,7,10 state=enable
The following command activates the IP Options defense on port 6 as well
as the mirroring feature so the examined traffic is copied to a destination
port mirror.
set dos ipoption port=6 state=enable mirroring=yes
The following command disables the IP Options defense on ports 5 and 7:
set dos ipoption port=5,7 state=disable