Cisco Tips & Tricks

May 9, 2006

Console log messages on telnet

Filed under: Router — ciscotips @ 12:44 am

The common problem which Cisco newbie’s face is that how to see debug console messages on telnet prompt. I have been asked this question for multiple times, not only from my juniors but also sometimes from my peers.

Command is “terminal monitor”. By enabling this command, all your console messages can be seen on a telnet session. But a word of caution here, if ever you enable terminal monitor, never forget to turn it off. Otherwise every time you will telnet that router/switch, you will see console messages coming on your telnet screen and sometimes these are quiet annoying.

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11 Comments »

  1. Thanks for sharing this information. Really is pack with new knowledge. Keep them coming.

    Comment by Kids And You — August 16, 2007 @ 11:44 pm

  2. Genius, let’s lecture the users on making sure they turn off the feature but not bother to give us the command to do so. Christ, what an asshole.

    it’s “terminal no shutdown’, fyi.

    Comment by TomTheGeek — June 23, 2011 @ 7:00 pm

    • If you don’t like the article or don’t like the way the information is presented then give constructive criticism without the name calling or just start your own website. Don’t be sarcastic and insult people.

      Comment by Tyler — June 30, 2011 @ 6:13 am

  3. i agree with TomTheGeek, although the name calling is over the top. as for this article, it is very ignorant to not provide both commands. there are FW admins that are loose canons, and will not no any better.

    Comment by KSBuchanan — August 1, 2011 @ 3:05 am

  4. BTW…the commands are:

    terminal monitor
    terminal no monitor

    Constructive criticism – know the audience you are writing to. You article is “foundation level” for a beginner, who will probably isn’t going to know the command to “turn off” what you told them to “turn on”.

    Comment by KSBuchanan — August 1, 2011 @ 3:09 am

  5. I like how TomTheGeek was such a smartass, but gave the wrong command to turn it off. It’s terminal no monitor…”Genius”

    Comment by ARealCCNP — June 13, 2012 @ 2:44 pm

  6. Thanks! Awesome little tidbit on here. I have never needed this until today and now i know how.

    Comment by John Gentle — November 8, 2012 @ 4:49 pm

  7. really usefull command. And correct

    Comment by CCNA — November 19, 2012 @ 9:11 am

  8. turn on with > terminal monitor & turn off with > terminal no monitor , why would you be so insulting ?……surely there was a point when you didn’t even know what the company cisco even did TomTheJurk

    Comment by Prehan Naidoo — May 26, 2013 @ 10:22 am

  9. […] Console log messages on telnet | Cisco Tips & Tricks – The common problem which Cisco newbie’s face is that how to see debug console … never forget to turn it off. Otherwise every time you will telnet that router/switch, you will see console messages coming on your telnet screen and sometimes these are quiet annoying. Like this … […]

    Pingback by Fix How To Stop Error Messages On Cisco Router Errors - Windows XP, Vista & Windows 7, 8 — October 16, 2014 @ 4:43 am

  10. At what prompt do I need to be at, when issuing the command?

    Comment by jeremy — April 22, 2015 @ 9:27 pm


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