enter image description here

I'm trying to enable span mirroring in cisco switch, but the switch doesn't seem to have the "monitor" option. Could someone tell me how to make this work?

  • Is this packet tracer? it doesn't have all feature of a real IOS device. If not we need your switch model and software version to help you.
    – JFL
    Commented Jan 9, 2017 at 14:09
  • Could you please attach the show version of the Switch?<br/> On Cisco Packet Tracer 7 the monitor session configuration works for the 2960, 2950 and 3560 Switch <br/> ![enter image description here](i.sstatic.net/V0Wzg.png)
    – new_py
    Commented Jan 9, 2017 at 14:20
  • In addition to @JFL's remarks, please copy/paste output instead and format it using { } instead of posting images.
    – Teun Vink
    Commented Jan 9, 2017 at 14:23
  • Yes, I'm using cisco packet tracer 6.3 @JFL
    – Jotsna
    Commented Jan 9, 2017 at 14:56
  • Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Version 12.2(25)FX, RELEASE SOFTWARE (fc1) - @cost Switch>enable Switch#config Configuring from terminal, memory, or network [terminal]? Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#no monitor session 1 ^ % Invalid input detected at '^' marker.
    – Jotsna
    Commented Jan 9, 2017 at 14:57

1 Answer 1


Packet Tracer has some built-in functionality to allow you to view the packets on the wire and won't support the monitor commands.

However, if you weren't on tracer, the setup is straightforward. E.g.

monitor session 1
monitor session 1 source int gi1/0/2 both (-- specifies span tx and rx
monitor sessions 1 destination int gi1/0/3

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.