Why a Mirror Session Is the Correct Choice
To analyze a wired client’s traffic with Wireshark, you need the traffic mirrored to your management station where Wireshark is installed. The most effective way to achieve this is by configuring a mirror session on the AOS-CX switch, specifying the client port as the source and your management station as the destination.
Analysis of Each Option
A. Access the client's switch's CLI from your management station. Access the switch shell and run a TCP dump on the client port:
Incorrect:
AOS-CX switches do not natively support packet capture (e.g., tcpdump) directly on the switch CLI.
This approach is not feasible for capturing and analyzing live client traffic.
B. Go to the client's switch in HPE Aruba Networking Central. Use the "Security" page to run a packet capture:
Incorrect:
HPE Aruba Networking Central provides security insights but does not directly support initiating packet captures for detailed analysis.
Traffic analysis with tools like Wireshark requires local packet capture at the management station.
C. Set up a policy that implements a captive portal redirect to your management station. Apply that policy to the client's port:
Incorrect:
Captive portals are designed for user authentication and redirection, not traffic analysis.
This would disrupt the client’s network activity without enabling traffic analysis in Wireshark.
D. Set up a mirror session on the client's switch; set the client port as the source and your station IP address as the tunnel destination:
Final Recommendation
To analyze the client's traffic, configure a mirror session on the switch, set the client port as the source, and direct the traffic to your management station where Wireshark is running.
References
AOS-CX Switch Port Mirroring Configuration Guide.
HPE Aruba Networking Central Monitoring and Troubleshooting Best Practices.
Wireshark Traffic Analysis and Capture Techniques.
