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New Member

SPAN is only one way

I've set up SPAN on my Cisco 2950 Switch to analyze network traffic. I've mirrored all traffic going to the switch source (FastEthernet 0/1) to destination

(FastEthernet 0/13)

The problem is that the sniffer I have on FastEthernet 0/13 needs to have the ability to email out. Plus, I need the ability to remote access into the server behind FastEthernet0/13 to manage the sniffer program.

How can this be done? Am I using the correct feature (SPAN)?

Much thanks,


(docs I was refering to)

Cisco Employee

Re: SPAN is only one way

From the document you pointed to...


The port does not transmit any traffic except that required for the SPAN session."

New Member

Re: SPAN is only one way

Is there any other way to set the switch so that it will allow me to have the server to have remote access ability?


Re: SPAN is only one way

Not with current IOS versions. It is hoped that this will be fixed in the future.

In the meantime, you can add a second NIC to the machine, transfer the IP address to it (the sniffing interface doesn't need one), and attach it to a normal switch port.

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