Enable SPAN (port mirroring) on all ports on Cisco Catalyst 3500 switch

Posted on 2004-04-29
Last Modified: 2007-12-19
Hi guys

Can someone tell me exactly what commands I need to issue to enable SPAN on all except one ports on my Cisco switch, the one port not included will be the monitor port.

I'm using Fa0/1 to Fa0/24, and also Gi0/1.


Question by:localgareth
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LVL 28

Expert Comment

ID: 10948272

Author Comment

ID: 10948329
Yeah - I already had that URL, but don't know anything about Cisco stuff.

I don't know what interface to specify in step 2... and I don't know how to specify all ports in step 3.

I need severe hand holding, hence the 500 points for this question.

LVL 10

Accepted Solution

anupnellip earned 500 total points
ID: 10948374
u need to enter the interface configuration of the monitoring port & 
use port monitor command for all the other interface u want to monitor .

e.g if fa0/1 is the port u will use to monitor the

interface fa0/1
port monitor fat0/2
 port monitor fa0/3

 port monitor fa0/24

LVL 10

Expert Comment

ID: 10948393
u can check the status from
show port monitor
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.


Author Comment

ID: 10948467
anupnellip, thanks.

does this look right for monitoring ports 2 to 12 on port 1?

interface FastEthernet0/1
 port monitor FastEthernet0/2
 port monitor FastEthernet0/3
 port monitor FastEthernet0/4
 port monitor FastEthernet0/5
 port monitor FastEthernet0/6
 port monitor FastEthernet0/7
 port monitor FastEthernet0/8
 port monitor FastEthernet0/9
 port monitor FastEthernet0/10
 port monitor FastEthernet0/11
 port monitor FastEthernet0/12

(taken from show running-config).

LVL 10

Expert Comment

ID: 10948513
looks ok to me

also check out

show port monitor

it should give u output like

Monitor Port Port Being Monitored

FastEthernet0/1 FastEthernet0/2
FastEthernet0/1 FastEthernet0/3
FastEthernet0/1 FastEthernet0/10
FastEthernet0/1 FastEthernet0/11
FastEthernet0/1 FastEthernet0/12

Author Comment

ID: 10948533
Cool - Thanx :-)
LVL 10

Expert Comment

ID: 10948568

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