01-19-2009 10:44 AM - edited 03-06-2019 03:31 AM
I'm trying to configure a diagnostic port on my Catalyst Express 500 G-12TC switch.
I have followed the docs (http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c612.shtml#Cat500) in setting up a diagnostic port, but I'm not seeing the traffic from the mirrored port. For example, I set up port Gi7 as the diagnostic port, monitoring port Gi5. The only traffic I see is broadcast and multicast. I do get a CDP packet every so often that says "Device ID: CiscoSwitch Port ID: GigabitEthernet5" but that's it.
Anyone know what I might have messed up?
Thanks!
01-19-2009 12:12 PM
A few things:
You may have sourced the wrong port, and thus you're only getting broadcast
You may have plugged the source into the wrong port
You may have plugged the sniffer in the wrong port, and you're only getting broadcast. (Note that if you get an IP address and have any type of connectivity on your sniffer this is the case).
You may have put the wrong destination port in.
On your CE500 (IP add A.B.C.C) you can go to:
And then you can type commands like 'show run', 'show monitor session all'
As well, you can go into global config mode and configure SPAN just like a normal switch. Except you do it via the HTTP CLI interface, it's a little clunky, but it works.
hth,
nick
01-19-2009 12:37 PM
Thank you for the suggestions. I am new to managing switches and I appreciate the help. I'm used to just telling someone to "mirror port a to port b" and it happens... never had to do it myself before! :D
I checked over the source port and my connections and they all seem correct per the document.
I ran the "show monitor session all" and got the following:
Session 1
---------
Type : Local Session
Source Ports :
Both : Gi5
Destination Ports : Gi7
Encapsulation : Replicate
Ingress : Disabled
When I go into the CNA and get the details on my diagnostic port (Gi7), it shows:
Role: Diagnostics, Ingress VLAN: none, Source Port: GigabitEthernet5
We only have one VLAN, (Default)... if I set the ingress VLAN to default, then my sniffer (wire shark on a laptop) will see it's own traffic, but still only broadcast and multicast otherwise.
Any more suggestions for the newb? :)
01-21-2009 05:25 AM
Anyone?
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide