Port Mirroring on a Cisco Catalyst 3560-X

[sparkotronic]

Hi,

I've just installed 2 of these in my workplace on a PLC network.

I'm now looking to set one of the ports up as my diagnostic port and would like to be able to mirror any of the other ports to this port.

I believe it is called SPAN on Cisco switches.

The only reference I can find to it is configuring via Telnet which I haven't got a clue about.

On my old Wiedmuller switches it was just a few clicks away.

Could anyone shine some light on the process for me.

Thanks in advance, Colin

[jurodri3]

Hello Mr. MacPhail,

My name is Diego and I am part of the Small business Support community. I have seen your post and I understand that you would like to configure SPAN on your 3560-x. Let me share with you the found information related to SPAN configuration.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_52_se/configuration/guide/swspan.html

If this answer was satisfactory for you, please mark the question as Answered.

Best regards,

Diego Rodriguez

Cisco Small Business Community Engineer

[sparkotronic]

Hi Diego,
I'd found that page but it made little sense to me.

I can configure port mirroring on the Wiedmuller switches web based interface.
I don't have a clue where to start on these things.

How do I enter the text commands to the switch to enable span?
Do Cisco supply/sell any software which will make it more (not very experienced)user friendly?

Best regards, Colin

[acampbell]

Colin,

You are correct it is called SPAN.
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_53_se/configuration/guide/swspan.html

A simple SPAN (or PORT MIRROR) is
to set which port will be monitored and which port will the
sniffer attach.

from config mode

conf t
!
mon sess 1 source interface g0/22
mon sess 1 destination interface g0/24
!
exit
!

Verify with
show mon sess 1

When you are finished monitoring you

turn it off by

conf t

!

no mon sess 1

!

exit

!

Regards,
Alex.
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