Debug/Packet Trace - flow options on the CSS11501 running 7.20 Build 3

Answered Question
May 17th, 2008
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Hello all, I need to do some packet tracing on the CSS11501 running 7.2 and need to limit debugged packets to a particular IP.

I know that you can set the IP by running: "flow trace-ip X.X.X.X"

But what HEX option would I need for the command : "flow options" to only limit the traffic to one IP?

From the help I get this:

flow options ?

00000020 Trace Route Changes

00000010 Simulate DOS Attack

00000008 Trace Spoof List

00000004 Trace Source IP Address

00000002 Trace UDP Flows

00000001 Trace TCP Flows

I tried different options like 0x00000004 and others, but get an error : "%% Invalid hex string entered".

I can only get all TCP packets using " flow options 0x0000001" and that causes all TCP packets being dumped onto the console which risks crashing the CSS device.

Has anyone been able to just dump packets from one particular IP address?

Thank you.


Correct Answer by Gilles Dufour about 8 years 11 months ago

try option 0x5 (0x4 + 0x1)


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Correct Answer
Gilles Dufour Mon, 05/19/2008 - 01:38
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  • Cisco Employee,

try option 0x5 (0x4 + 0x1)


dtochilovsky Mon, 05/19/2008 - 14:14
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Thank you Gilles, that worked!

Don't know why I did not try that before :)



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