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Administration: Diagnostics
Configuring Port and VLAN Mirroring
Configuring Port and VLAN Mirroring
NOTE
Cisco 220 Series Smart Plus Switches Administration Guide Release 1.0.0.x
To view the status of optical modules, click Administration > Diagnostics >
Optical Module Status.
The following fields are displayed:
•
Port—Port number on which the SFP is connected.
•
Temperature—Temperature in Celsius at which the SFP is operating.
•
Voltage—SFP's operating voltage.
•
Current—SFP's current consumption.
•
Output Power—Transmitted optical power.
•
Input Power—Received optical power.
•
Loss of Signal—Local SFP reports signal loss. Values are True and False.
Port Mirroring is used on a network switch to send a copy of network packets
seen on one switch port, multiple switch ports, or an entire VLAN to a network
monitoring connection on another port on the switch. This is commonly used for
network appliances that require monitoring of network traffic, such as an intrusion-
detection system. A network analyzer connected to the monitoring port processes
the data packets for diagnosing, debugging, and performance monitoring.
The switch supports up to four mirroring sessions. Each session can be used for
local mirroring or remote mirroring purposes. Mirroring does not affect the
switching of network traffic on the source ports or VLANs. Each session should
have a different destination port, except for traffic that is required for the mirroring.
The destination port can be used to receive or forward normal traffic.
A packet that is received on a network port assigned to a VLAN that is subject to
mirroring is mirrored to the analyzer port even if the packet was eventually
trapped or discarded. Packets sent by the switch are mirrored when Transmit (Tx)
mirroring is activated.
Mirroring does not guarantee that all traffic from the source port(s) is received on
the analyzer (destination) port. If more data is sent to the analyzer port than it can
support, some data might be lost.
The RSPAN VLAN feature is only applicable for the China switch models.
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