Is there a command that doesn't involve the use of logging, to check for bandwith usage? A recent problem I had ran into was a machine sending out a broadcast continuously and it hosed the switch(a 3750). The machine was found via a network monitoring tool but it would be nice to identify such a culprit via the command line on a cisco switch.
Thoughts?
-- conrad
you can easily see the real time traffic on any port, by using the "show interface xx" command. you can also set the load interval time to 30 seconds in the interface configuration mode so when you do the show int command you see the load averaged over 30 seconds (rather than the default 5 minutes).
There are some commands you should also look into to stop this happening again:
"udld port" stops unidirectional traffic on a port, such as in the case of a layer 2 loop. puts interface into err-disabled mode "storm-control broadcast level 3.00" which will allow up to 3% of the total bandwidth to be broadcast traffic before filtering it out.
Also if you need to access the switch remotely then you should use the commands:
errdisable recovery cause udld errdisable recovery cause storm-control
which re-enables the port after 30 seconds should it ever be put into err-disabled mode fromt he storm control or the udld protection. (otherwise it will stay in err-disabled mode until you manually restore it.
Flamer.
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