Explore common scenarios leading to unexpected PCAP behavior in this guide. Identify root causes, follow troubleshooting steps, and implement solutions to enhance and optimize PCAP functionality as per expectations.

• SRX branch devices
• PCAP fails to capture the intended interesting traffic.
• PCAP exhibits behavior inconsistent with expectations, not delivering the anticipated results.

Check for Other Sampling Configurations:

• Ensure there are no conflicting sampling configurations on the same interface. If present, temporarily remove other sampling configurations to run the PCAP, and then reapply them if necessary.

Review Firewall Filters:

• Verify that firewall filters are not overshadowing those configured for PCAP.
• Actions set in firewall filters take precedence over PCAP configurations; hence, confirm there are no conflicting settings. Adjust configurations as needed to avoid conflicts.

Firewall Filters Overview

[Includes video] How to create a PCAP packet capture on a SRX branch device