Planet XGS3-24042 User Manual Page 612

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69-5
Chapter 69 Mirror Configuration
69.1 Introduction to Mirror
Mirror functions include port mirror function, CPU mirror function, flow mirror function.
Port mirror refers to the duplication of data frames sent/received on a port to another port. The duplicated port
is referred to as mirror source port and the duplicating port is referred to as mirror destination port. A protocol
analyzer (such as Sniffer) or a RMON monitor will be connected at mirror destination port to monitor and
manage the network, and diagnose the problems in the network.
CPU mirror function means that the switch exactly copies the data frames received or sent by the CPU to a
port. Flow mirror function means that the switch exactly copies the data frames received or by the specified
rule of a port to another port. The flow mirror will take effect only the specified rule is permit.
A chassis switch supports at most 4 mirror destination ports, each boardcard allows a source or destination
port of a mirror session. At present, each box switch can set many mirror sessions.For XGS3 series box
switches, many mirror sessions are not supported by XGS3-24042.There is no limitation on mirror source
ports, one port or several ports is allowed. When there are more than one source ports, they can be in the
same VLAN or in different VLAN. The source port and destination port can be in different VLAN.
69.2 Mirror Configuration Task List
1. Specify mirror destination port
2. Specify mirror source port
3. Specify flow mirror source
1. Specify mirror destination port
Command
Explanation
Global mode
monitor session <session> destination
interface <interface-number>
no monitor session <session> destination
interface <interface-number>
Specifies mirror destination port; the no
command deletes mirror destination source
port.
2. Specify mirror source port
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