Re: Network Monitoring

["Paul Halliday" <paul.halliday () gmail com>]

Quick start:

Fire up wireshark on any machine (preferably one that exhibits
slowdowns) and see what your background noise is like. You don't need
any fancy setup - just download and run it.
Who is talking to who? what are they talking? etc.

As you have no idea what is causing your problems this simple test can
help you identify any obvious issues.

Moving on:
If you aren't seeing anything useful from these traffic dumps its time
to move on.

If your switches are managed, take a peek at their logs. I would also
want to see what the Routers/L3's are up to.

I would hold off on the the span port and complex setups until you
have done some basic troubleshooting.

Good luck.

On 9/20/07, Davis Kwan <dkwan () georgina ca> wrote:
> Hi list,
>
> We are currently experiencing a problem with network slowdowns. I was
> wondering if there are any software applications out there that can monitor
> internal traffic to measure the efficiency of the internal network? I want
> to see if the bottleneck is with one of our backbones or if a user is
> flooding the network b/c of spyware. Any suggestions??
>
> Thanks in advance,
> Davis
>
> This message may contain confidential information and is intended only for the individual(s) named. If you are not a 
> named addressee you should not disseminate, distribute or copy this e-mail. If you have received this email in error 
> please notify the sender or system manager.