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24710 Views 4 Replies Latest reply: Apr 13, 2011 8:37 PM by Rolando RSS

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Lab problem with % Invalid input detected at '^' marker

Apr 9, 2011 9:15 AM

David 11 posts since
Apr 5, 2011

I can't seem to figure out what I'm doing wrong. I'm working on a lab in Packet Tracer, and I'm running into a problem. The lab is asking me to rename the  hostname on a switch, connected to a laptop. I open the 'Terminal", press my enter key, and type 'hostname LOCAL-SWITCH'. It responds by giving me this: "% Invalid input detected at '^' marker." I'm a little stumped. I can type hostname, and it'll try to resolve a hostname unsuccessfully, but that's it.

  • Keith Barker - CCIE RS/Security, CISSP 5,351 posts since
    Jul 3, 2009

    Hello David-

     

    On the switch you are connected to, does the prompt look similar to this:

     

    switch>

     

    If so, we need to type in "enable" to go into privileged mode, where the prompt will look like this:

     

    switch#

     

    If we are in privileged mode (as above), we would need to go into configuration mode, using:

     

    configure terminal

     

    and the prompt should change to this:

     

    switch(config)#

     

    From here, we can change the hostname, using the commands mentioned in the original post.

     

    Best wishes, and happy studies.

     

    Keith

  • Martin 13,070 posts since
    Jan 16, 2009

    this usually means you are in wrong mode (configuration mode); or PT does not support that command or IOS does not support command;

     

    you can always use ? mark to see all comands avaiable.

  • Scott Morris - CCDE/4xCCIE/2xJNCIE 8,396 posts since
    Oct 7, 2008

    As has been pointed out, commands are certainly context-sensitive whether in user, exec or config modes.

     

    The good news is that the help feature is ALSO context-sensitive!

     

    So use "?" and see if you can find the "hostname" command as an option.  

     

    HTH,

     

    Scott

  • Rolando 117 posts since
    Apr 13, 2011

    Scott made a great explanation!

    Is also valid to say that the ^ marker is very helpful it can also marks where could be de problem if we type incorrectly a command.

     

    For example

     

    If I type:

    Router(config-if)#ip address 192..168.243.1 255.255.255.0

     

    The marker will indicate where is the problem, in the above example the result will be:

     

    Router(config-if)#ip address 192..168.243.1 255.255.255.0

                                                                ^

    Invalid input detected at '^' marker.

     

     

    Which indicate that I type two times the point in the IP address so it will easier to edentify the problem

     

    Regards!!!

    Rolando

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