Manual

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Москва, Новозаводская ул., 18, стр. 1
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Chapter 56 Mirror Configuration
56.1 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 by the
specified rule of a port to another port. The flow mirror will take effect only the specified rule is
permit.
Switch supports one mirror destination port only. 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.
56.2 Mirror Configuration Task List
1. Specify mirror destination port
2. Specify mirror source port (CPU)
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.