System information

Configuring the Switch
2-33
Using a Mirror Port for Analysis
You can mirror traffic from any source port to a target port for real-time analysis. You
can then attach a network sniffer or RMON probe to the target port and study the
traffic crossing the source port in a completely unobtrusive manner. When mirroring
port traffic, note that the target port must be included in the same VLAN as the
source port. (See “Configuring Virtual LANs” on page 2-44.)
You can use the Mirror Port Configuration screen to designate a single port pair for
mirroring as shown below.
Designated Cost The cost for a packet to travel from this port to the root in the current Spanning Tree
configuration. The slower the media, the higher the cost.
Designated Bridge
(ID)
The priority and MAC address of the device through which this port must communicate
to reach the root of the Spanning Tree.
Designated
Port (ID)
The priority and number of the port on the designated bridging device through which this
switch must communicate with the root of the Spanning Tree.
Alcatel OmniStack 6124
< Mirror Port Configuration >
Mirror Source Port : Unit 1
Port 1
Mirror Target Port : Unit 1
Port 2
Status : DISABLED
<Apply> <Ok> <Cancel>
Use <TAB> or arrow keys to move, other keys to make changes.
Parameter Description
Mirror Source Port The port whose traffic will be monitored.
Mirror Target Port The port that will duplicate or “mirror” all the traffic happening on the
monitored port.
Status Enables or disables the mirror function.
Parameter Description