Is it possible to detect if any cable was connected/disconnected in real time via Telnet session on Cisco Catalyst 4506?

For example, I have an IBM Switch EN94093R that does it by default, when I unplug and then plug again a cable from the switch, it shows up on the SSH/Telnet session instantly, as shown below:

enter image description here

Is there a similar way to do this on the Cisco Switch? It is really useful on cases like mine where you don't know the mac or IP addresses.

  • 5
    Did you turn on "term mon"?
    – Ron Maupin
    Apr 6, 2015 at 17:47
  • 1
    Do you want to see it on the console, or do you want a snmp trap? You can also use syslog.
    – Ron Trunk
    Apr 6, 2015 at 19:44
  • @RonMaupin I tried to use it, but it wont enable. If I use the command sh logging to check, it shows: Syslog logging: enabled (0 messages dropped, 150 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled) Console logging: disabled Monitor logging: disabled Apr 6, 2015 at 20:33
  • @Ron I want to see it instantly on the console, specially link up or link down events. Apr 6, 2015 at 20:35

1 Answer 1


From configuration mode, type

logging monitor info

then from enable mode type

term[inal] mon[itor]

this will send console messages to your vty session.


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