Switching, Catalyst 3000

[srinivasthotakuri]

How do i configure port mirror/span port in catalyst 3650 through web interface or cli . I want to mirror the all 20 ports on to one port

[liviu.gheorghe · Accepted solution]

Hello @srinivasthotakuri ,

you will have to configure similar to this example:

monitor session 1 source interface Gi1/0/1 - 20

monitor session 1 destination interface Gi1/0/24

[srinivasthotakuri]

done sir..thank you. Can you suggest me how do I confirm whether entire traffic is reflecting on SPAN port.

[liviu.gheorghe]

That's a tough one... and generally easier said than done.

Besides taking Cisco's word for it, you can sum up the traffic for your source interfaces and the value should be equal to the traffic values of the destination interface.

Alternatively, you can use only one source interface with Wireshark installed, generate some traffic and see on the destination port, also Wireshark installed, that the traffic from the source matches.

Realistically speaking, I don't think you should be worried about traffic missing in your SPAN session.