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New Member

Catalyst 2950 + monitor session

Trying to use the span feature, put the commands listed below in and they entered successfully, but the port is not being mirrored.

monitor session 1 source interface FastEthernet0/4

monitor session 1 destination interface FastEthernet0/7

It is listed when I show monitor session. Interface 0/7 showed it going down shortly after I entered the commands, leading me to believe that it rebooted the interface. Is there something I missed?

Thanks,

Scott

4 REPLIES
Cisco Employee

Re: Catalyst 2950 + monitor session

If you are running 12.1(6)EA2 or earlier, refer to the Enabling Switch Port Analyzer section of the following document

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/2950_wc/scg/scg_mgmt.htm#xtocid1112012

http://www.cisco.com/warp/customer/473/41.html#span_cat2950_3550

New Member

Re: Catalyst 2950 + monitor session

Those are the documents I used initially to set it up.

Scott

Cisco Employee

Re: Catalyst 2950 + monitor session

What software verion are you running? Can you paste the output of sh ver.

Why do you say it's not working. Do you not see any traffic on a sniffer? Also the SPAN destination port is always down(meaning it does not pass normal network traffic other than SPAN traffic).

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12113ea1/2950scg/swspan.htm#1036749

New Member

Re: Catalyst 2950 + monitor session

Version is 12.1(9)EA1

My sniffer is not seeing any traffic other than broadcasts.

The destination interface shows that it is up with line protocol down.

Scott

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