Configuration For Mirroring Features; Mirroring Features - 3Com 4200G 12-Port Configuration Manual

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Mirroring Features

Traffic Mirroring
Port Mirroring
Remote Port
Mirroring—RSPAN
C
ONFIGURATION FOR
F
EATURES
Mirroring refers to the process of copying packets that meet the specified rules to a
destination port. Generally, a destination port is connected to a data detect device,
which users can use to analyze the mirrored packets for monitoring and
troubleshooting the network.
Figure 76 Mirroring
Uses ACLs to identify traffic flows and mirror packets that match to the destination
port.
Port mirroring refers to the process of copying the packets received or sent by the
specified port to the destination port.
Remote switched port analyzer (RSPAN) refers to remote port mirroring. It eliminates
the limitation that the mirrored port and the mirroring port must be located on the
same switch. This feature makes it possible for the mirrored port and the mirroring
port to be located across several devices in the network, and facilitates the network
administrator to manage remote switches.
The application of RSPAN is illustrated in Figure 76:
Figure 77 RSPAN application
Source Source
Switch Switch
Reflector port Reflector port
Source Port Source Port
There are three types of switches with the RSPAN enabled.
Source switch: the switch to which the monitored port belongs.
■
M
Netw ork Netw ork
Destination port Destination port
PC PC
Remote-probe VLAN Remote-probe VLAN
Intermediate Switch Intermediate Switch
Trunk port Trunk port
IRRORING
Data detect device Data detect device
Destination port Destination port
Destination Destination
Switch Switch