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Port Monitoring Application Example
Host A and B are connected via port 0/2 of the switch, and Host C and D are connected via
port 0/3.
When a switch suffers an attack, some situations may arise, for example, the shell responds
slowly or unable to ping the direct-connection interface, the connection is not stable when
visiting the external network.
Step1:
Observe which ports’ indicator lights are flashing. The frequent flashing indicates that
a great deal of packets are being sent or received.
Enable the port-level monitoring on these ports:
Command
Description
switch(config)# port 0/2-0/3
To enter the port
switch (config-port-range)# monitor enable
To enable the port level monitoring
Wait a moment and then observe the statistic information about the broadcast packets of the
port
switch(config-port-range)# show monitor broadcast-packet
----------------------------------------------------------------------------------------
Entry Port Type Count Drop Count Amount Drop Amount
-------------------------------------------------------------------------------------
1 0/3 Broadcast 3952 0 16952 0
2 0/2 Broadcast 247 0 1104 0
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