I have a Cisco 3620 router as my main router receiving incoming traffic for all of the three campus locations plus the internet; I want to use Etherpeek (packet monitoring software) for all traffic not just a portion of the network. I cannot figure out what is the monitoring port on the router to do this. Any suggestions?
I am working as an intern for a school district, so I am pretty new to this.
Be gentle

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Thers is no monitor port on a 3620.

You'd need to pick one interface that you want to monitor and "span" that on the switch port it is connected to.

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Help me with this "span" idea.

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Spanning a switch port is basically duplicating the traffic on one switch interface (the one connected to your router) to another (the one connected to your sniffer.)

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The only thing you will be able to "sniff" will be your inside ehternet interface. Assuming your router goes into some type of switch. If that switch doenst support some kind of SPAN session. Then one will have to be added between the router and your current switch.


DP

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dj dell,
it sounds to me like ... sniffing a school network
Do you know what things used to happen to the "net-admins" in my school when they tried to do this
Ok I will not teach you moral lessons... but sniffing a network could be very interessting from the designer-point of view. You need to understand some things about the traffic in your network.
Post a "picture" of the network.

...and don't forget that the schoolboys and -girls even don't need an access to your network equipment to sniff the traffic. And net-admins don't always use encrypted connections

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