Trying to monitor port on Cisco 1841

Jul 20, 2009 4 Replies

Anybody know what's going on here? I am trying to monitor f0/0 to f0/1, when I go to conf t, I try this: ROUTER(config)#mon session 1 source int f0/0 ^ % Invalid input detected at '^' marker.



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A 'sh int f0/0' sure works fine. Why won't this?



Here I am using the trusty '?', just to make sure I am entering the command right, and it appears that way, except when I enter it, I get that error. Example:



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ROUTER(config)#mon session 1 source int ? FastEthernet FastEthernet IEEE 802.3



ROUTER(config)#mon session 1 source int f ? FastEthernet interface number



ROUTER(config)#mon session 1 source int f 0 ? % Unrecognized command



108BISBEE(config)#mon session 1 source int ? FastEthernet FastEthernet IEEE 802.3

ROUTER(config)#mon session 1 source int f? FastEthernet



ROUTER(config)#mon session 1 source int f0? /



ROUTER(config)#mon session 1 source int f0/? FastEthernet interface number



ROUTER(config)#mon session 1 source int f0/0 ^ % Invalid input detected at '^' marker.


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If anyone has any ideas, I would greatly appreciate it!



Here is part of the sh ver:



--------------------------------------------------------------------- Cisco IOS Software, 1841 Software (C1841-ADVSECURITYK9-M), Version 12.4 (3i), RELEASE SOFTWARE (fc2) Technical Support:

formatting link
(c) 1986-2007 by Cisco Systems, Inc. Compiled Wed 28-Nov-07 18:48 by stshen



ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)



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Thanks for any help, ponga


You can't SPAN a router interface on a router, which is what the monitor command does. The monitor command is only valid on a switch.

I agree, however it would be nice if unsupported commands were not included in the "help".

There is no reason at all to have them 'appear' to be supported and then to find that they don't actually work.

I would imagine that the geniuses who designed the IOS command line would be horrified by this abberation. They had a clue.

The 1841 ISR has 8 Fastethernet ports for connecting access devices. Explains why the command is available.

Well, that explains it. Thanks.

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