SNR S2940-8G-v2, Configuration Manual

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SNR S2940-8G-v2 Switch Configuration Guide
Mirror Configuration
Chapter 61
Mirror Configuration
61.1 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.
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.
61.2 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 inter-
face <interface-number> Specifies mirror destination port; the no
command deletes mirror destination source
port.
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