EXOS Packet Capture

[Stefan_K_]

Hello,

today I played around with the built-in packet capture of EXOS ( How To: How to perform a local packet capture on an EXOS switch | Extreme Portal (force.com) )

I’m able to capture packets and open the pcap file with wireshark, but I only see the following packets:

Wondering if I’m doing something wrong or if the feature is something else than I’m thinking. Any hints?

Best regards
Stefan

[CThompsonEXOS]

Hi Stefan,

You bring upa good point(Stefan 1, Chris 0) so that article has been updated:

How To: How to perform a local packet capture on an EXOS switch | Extreme Portal (force.com)

Thanks again,

Chris Thompson

[Stefan_K_]

Hi Chris,

this worked like a charm, thank you very much! How much “trouble” some 52 bytes can cause… 🙂

Maybe this little information can be added to the GTAC articles?

Best regards
Stefan

[CThompsonEXOS · Accepted solution]

Hi,

You can use the editcap tool to remove the first 52 bytes.  Mine looked something like below from Powershell:

PS C:\Program Files\Wireshark> .\editcap.exe -C 52 editcap.pcap newpcap.pcap

syntax below:
PS C:\Program Files\Wireshark> .\editcap.exe -C 52 <original pcap filename> <new pcap filename>

Below is more on editcap:

https://www.wireshark.org/docs/man-pages/editcap.html

Before:

After:

Thanks,

Chris Thompson

[Stefan_K_]

Hi Chris,

thanks for your quick reply! I’m on 30.7.1.1-patch1-86. Switch is an X460-G2. I’m just doing some testing of this feature and don’t want to capture any specific traffic for now. But we might need this feature in the near future. (Troubleshooting at a customers site)

Best regards
Stefan