port mirroring on cisco 2970

hi,

Anyone knows the command to mirror a port on a cisco 2970 gig switch?
ios ver Version 12.1(14r)EA1a.
thanks in adv.

 

Try

interface FastEthernet0/2
description Monitoring Port - All traffic will hit this port from
thosebelow.
port monitor FastEthernet0/3
port monitor FastEthernet0/4
port monitor FastEthernet0/5
port monitor FastEthernet0/13
port monitor FastEthernet0/14
port monitor FastEthernet0/15

G

 

Thanks for the reply.
unfortunately the port mirror does not apply to these switches.

found the following command.. haven't put it in yet - will do tonight.

Switch(config)# monitor session 1 source interface gigethernet0/1
Switch(config)# monitor session 1 destination interface gigethernet0/10
encapsulation dot1q

hope this will work..
cheers

 

Only in older hardware. Something like a 2924xl, but not much newer.

 

Taken from document:
http://www.cisco.com/en/US/products...figuration_guide_chapter09186a00801cde7c.html

This example shows how to set up a SPAN session, session 1, for
monitoring source port traffic to a destination port. First, any
existing SPAN configuration for session 1 is cleared, and then
bidirectional traffic is mirrored from source port 1 to destination
port 10.
Switch(config)# no monitor session 1
Switch(config)# monitor session 1 source interface fastethernet0/1
Switch(config)# monitor session 1 destination interface
fastethernet0/10 encapsulation dot1q
Switch(config)# end

 

There is good document on this and which clearly explain how to do. search for "How to do capture on Cisco".

Plz note - once u start monitoring, port will go into monitoring mode and you wont be able to access laptop where u are capturing.