Port Mirroring
49
Port Mirroring
This section describes the Port Mirroring feature.
Overview
Port Mirroring:
z
Allows you to monitor network traffic with an external network analyzer
z
Forwards a copy of each incoming and outgoing packet to a specific port
z
Is used as a diagnostic tool, debugging feature or means of fending off attacks
z
Assigns a specific port to copy all packets to
z
Allows inbound or outbound packets to switch to their destination and to be copied to the
mirrored port
CLI Examples
The following are examples of the commands used in the Port Mirroring feature.
Example #1: show monitor session
(Console)
#show monitor session 1
Session ID
Admin Mode
Probe Port
Mirrored Port
----------
----------
----------
-------------
1
Enable
0/5
0/4
NOTE:
Monitor session ID “1” - “1” is a hardware limitation.
Example #2: show port all
(Console)
#show port all
Admin
PhysicalPhysicalLink
Link
LACP
Intf
Type
Mode
Mode
StatusStatus
Trap
Mode
----
----
------
---------------------- ----
----
0/1
Enable
Auto
Down
Enable
Enable
0/2
Enable
Auto
Down
Enable
Enable
0/3
Enable
Auto
Down
Enable
Enable
0/4
Mirror
Enable
Auto
Down
Enable
Enable
0/5
Probe
Enable
Auto
Down
Enable
Enable
0/6
Enable
Auto
Down
Enable
Enable
0/7
Enable
Auto
Down
Enable
Enable
0/8
Enable
Auto
Down
Enable
Enable
0/10
Enable
Auto
Down
Enable
Enable
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