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Cisco Employee

How to configure catylst 2960?

Hi, All:

I'm trying to capture packets running between router1 and router2. I used a catylst 2960 to connect to router1 and router2, and use another port to connect to my laptop ethernet port.
What should I configure in order to see all the traffic between router1 and router2 on my laptop?

I tried with ping from router1 to router2, but I guess the packets just go directly to router2, and my laptop does not capture anything.

Do I need to configure anything on the cat2960 switch for the 3 ports in order for the packets to flood over each port that my laptop can capture all the packets?

Thanks!

1 REPLY

Re: How to configure catylst 2960?

Hi,

You can configure Local SPAN in your 2950 switch  and install ethereal or wireshark in your laptop.Then you can capture  the traffic between router 1 and router2.

sample  configuration:

C2950(config)#
C2950(config)#monitor session 1 source interface fastethernet 0/2 (you  can add more interfaces)
C2950(config)#monitor session 1 destination interface fastethernet 0/3  (your laptop should connect this port)

For  more informatiom just have a look ino the below URL

http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c612.shtml

Regards

Karuppu

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