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Problems Using Port Spanning on Cisco 3550
Hi All,
I have purchased a copy of Network Instruments Observer suite, but am having problems with my port spanning on my Catalyst 3550.
Here's my set up.
In the server room, we have a 24 Port Catalyst 3550 which is our core switch, all the servers and other switches are linked through this one.
I have a cable patched into Port 1 on the switch to my machine down here, which has a Network Instruments PCMCIA card in (promiscuous)
If want to port span one of the ports to monitor it and send the traffic through to this port I am entering the following (Port 16 is the example in this)
CATALYST_9#conf t
CATALYST_9(config)#monitor
CATALYST_9(config)#monitor
CATALYST_9(config)#exit
CATALYST_9#show monitor session 1
Session 1
---------
Type : Local Session
Source Ports :
Both : Fa0/16
Destination Ports : Fa0/1
Encapsulation : Native
Ingress: Disabled
So all looks OK, but as soon as I make these changes, it effectively disables the PCMCIA card connection that is plugged into Port 1
How do I stop this? I can't even ping anything, to get my connection back I have to hyperterminal in from another machine and remove the monitor ports.
Many Thanks
Andy
I have purchased a copy of Network Instruments Observer suite, but am having problems with my port spanning on my Catalyst 3550.
Here's my set up.
In the server room, we have a 24 Port Catalyst 3550 which is our core switch, all the servers and other switches are linked through this one.
I have a cable patched into Port 1 on the switch to my machine down here, which has a Network Instruments PCMCIA card in (promiscuous)
If want to port span one of the ports to monitor it and send the traffic through to this port I am entering the following (Port 16 is the example in this)
CATALYST_9#conf t
CATALYST_9(config)#monitor
CATALYST_9(config)#monitor
CATALYST_9(config)#exit
CATALYST_9#show monitor session 1
Session 1
---------
Type : Local Session
Source Ports :
Both : Fa0/16
Destination Ports : Fa0/1
Encapsulation : Native
Ingress: Disabled
So all looks OK, but as soon as I make these changes, it effectively disables the PCMCIA card connection that is plugged into Port 1
How do I stop this? I can't even ping anything, to get my connection back I have to hyperterminal in from another machine and remove the monitor ports.
Many Thanks
Andy
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ASKER
Anyone else know why this would be cutting off all my other network connections? It doesn't make sense!
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ASKER
I just tried that but it won't capture any traffic that's not TCP/IP (almost everything) :O(
It's running on my HP Compaq NC6000 running Windows XP SP2
It's running on my HP Compaq NC6000 running Windows XP SP2
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ASKER
Hi guys, turns out my machine was locking up, as 512MB wasn't enough to handle it
ASKER
Hi,
I am closing this on behhalf of my colleauge.
I have split the points fairly between all respondents with a slight bias towards lrmoore for the most feedback.
Thanks again.
I am closing this on behhalf of my colleauge.
I have split the points fairly between all respondents with a slight bias towards lrmoore for the most feedback.
Thanks again.
ASKER
But as soon as I enable the promiscuous card, it cuts off all my network traffic!! what could be causing that?
For example, I have a continuous ping to one of the fileservers using the regular connection, but the moment I connect my promiscuous card it starts timing out.