08-26-2010 06:45 AM - edited 02-21-2020 04:03 AM
I am seeing a bandwidth spike at around 2:40am every morning that lasts for about 10 mintues but I can't remember how to find what the device is that is causing it. I have a Fluke Optiview II network analyzer connected to the network but it only shows me the top hosts on the current vlan. It has been a few years since I did this and just need a refresher on how to configure the port on the switch so it sees all traffic from all vlans and switches so I can identify the culprit. I am pretty sure it was a debug command.
09-03-2010 11:57 AM
On most Cisco switches, you can enable a feature called SPAN which will allow you to replicate port or VLAN traffic to a destination port. Please refer to the doc below for some configuration samples.
09-03-2010 12:17 PM
You course also leverage Netflow to get information about connections and thus find top talkers and where the bw is spent.
I hope it helps.
PK
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