Port Monitoring
Page 19-63

Starting a Port Monitoring Session (pmon)

You enable a port monitoring session through the pmon command. To start a session, enter
pmon followed by the slot and port number that you want to monitor. For example, to moni-
tor a port that is the first port in the fourth slot of the switch, you would enter
pmon 4/1
You can only monitor Ethernet 10BaseT ports. If a port is already being mirrored (enabled
through the addvp or modvp command) you cannot monitor it. Also, you cannot set up more
than one monitoring session on the same port.
If the port is currently being monitored, or mirrored, the following message displays:
Port 4/1 is being monitored.
Disable monitoring? (y)
If the port is not being monitored, or mirrored, the following message displays:
Port 4/1 is not being monitored, or mirrored.
Enable monitoring? (y)
Enter a Y and press <enter> at this prompt. The following screen of options displays:
Slot/Port : 5/1
RAM disk size 1000 Kilobytes
Capture to filename : y
Capture filename : PMONITOR.ENC
Dump to screen : y
Broadcast frames : y
Multicast frames : y
Unicast frames : y
Change any of the above (y/n)? (n) :
If you want to change any of the values, enter a Y and press <enter>. You will be prompted
for all of the values in the screen except the RAM disk size, which you must change through
the pmcfg command before starting the session. The information selected in this screen will
be saved in flash configuration memory.
Enter any new values as prompted. The above screen re-displays to show the new values.
Press <enter> to accept the updated values. Messages similar to the following display:
1048576 byte RAM drive /ram already initialized.
Bytes remaining on RAM disk = 1040384
The port monitoring session has begun. What happens at this point depends on whether you
chose the Dump to screen option. The sections below describe what happens in each case.
♦ Note ♦
If you change the capture filename from the default,
you must specify /ram. Otherwise, the file will be saved
in the flash directory.