3com 8807 Reference Guide

Page of 1099
QoS Commands
253
group may contain one monitoring port and several monitored ports. You can also 
specify the direction of the monitored packets.
Switch 8800 Family series support up to 24 mirroring groups at a port.
Related command: display mirroring-group.
Switch 8800 Family series support cross-card mirroring, that is, the monitoring and 
monitored ports can be at different cards.
Consider these issues when configuring port mirroring:
For intra-card mirroring, only one monitoring port can be configured for the 
mirroring groups in the same direction.
For cross-card mirroring, only one monitoring port (which is on another card) 
can be configured for the mirroring groups in the same direction.
You can only configure eight monitored ports for all the mirroring groups in 
transmit group.
One port can act as mirroring port and mirrored port at the same time for 
different mirroring group.
More issues for the GV48 or GP48 card:
For the mirroring (including inbound port mirroring and outbound port 
mirroring) on the same GV48 or GP48 card, only one monitoring port is 
allowed.
For all mirroring groups configured in the system, only one monitoring port is 
allowed on the same GV48 or GP48 card.
By default, two port groups of the XP4 card are created. The member ports are 
port 0-1 and port 2-3 respectively. Consider these issues when configuring port 
mirroring:
The XP4 card does not support cross-group port mirroring, that is, the 
monitoring ports and monitored ports in the same port mirroring group can 
only be port 0 to 1 or port 2 to 3.
You can configure an inbound monitoring port and an outbound monitoring 
port in a port group respectively. There is only one monitoring port in other 
types of interface cards.
Related command: display mirroring-group.
Example
# Configure mirroring group 1, the monitored ports are Ethernet3/1/1 to 
Ethernet3/1/3, and the monitoring port is Ethernet3/1/4, monitoring only inbound 
packets.
<SW8800> system-view
 
System View: return to User View with Ctrl+Z.
 
[SW8800] mirroring-group 1 inbound ethernet 3/1/1 ethernet 3/1/2 
 
ethernet 3/1/3 mirrored-to ethernet 3/1/4