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SET SPAN not working

Catalyst 4003 switch: I am trying to span all ports to port 34 using this command:

set span 2/1-33 2/34 both inpkts enable learning enable create

Problem is when I do this, the server that is plugged in to that port (34) which I want to use to capture traffic to can no longer see the network when the span is set.

What am I missing?

Thanks!!

Dave

1 REPLY
Bronze

Re: SET SPAN not working

Hi Dave

Once a port becomes an active destination port, it does not forward any traffic except that required for the SPAN session. By default, an active destination port disables incoming traffic (from the network to the switching bus), unless you specifically enable the port. If incoming traffic is enabled for the destination port, it is switched in the native VLAN of the destination port. The destination port does not participate in spanning tree while the SPAN session is active.

Check this link,

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a008007f323.html

hth

Aslam.

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