Port Mirroring Using The Command Line Interface; Commands - GE MultiLink ML1200 Instruction Manual

PORT MIRRORING AND SETUP
9.2

Port Mirroring using the Command Line Interface

9.2.1

Commands

9–2
Monitoring a specific port can be done by port mirroring. Mirroring traffic from one port to
another port allows analysis of the traffic on that port.
The
show port-mirror
show port-mirror
The command enters the port mirror configuration mode.
port-mirror
port-mirror
The command configures a port mirror.
setport monitor
setport monitor=<monitor port number> sniffer=<sniffer port number>
The command enables and disables port mirroring.
prtmr
prtmr <enable|disable>
The sequence below illustrates how port 1 is mirrored on port 2. Any traffic on port 1 is also
sent on port 2.
ML1200#
show port-mirror
Sniffer Port: 0
Monitor Port: 0
Mirroring State: disabled
ML1200#
port-mirror
ML1200(port-mirror)##
Port 1 set as Monitor Port
Port 2 set as Sniffer Port
ML1200(port-mirror)##
Port Mirroring Enabled
ML1200(port-mirror)##
ML1200#
show port-mirror
Sniffer Port: 2
Monitor Port: 1
Mirroring State: enabled
ML1200#
Once port monitoring is completed, GE strongly recommends that the port mirroring be
disabled using the
prtmr disable
1. Only one port can be set to port mirror at a time.
2. Both the ports (monitored port and mirrored port) have to belong to the same
VLAN
3. The mirrored port shows both incoming as well as outgoing traffic
CHAPTER 9: PORT MIRRORING AND SETUP
command displays the status of port mirroring:
setport monitor=1 sniffer=2
prtmr enable
exit
command for security reasons.
MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL