Capture Network Packets

Ethernet Capture Tool allows you to capture network packets for troubleshooting in scenarios such as extension registration failure, no audio or one-way audio issue, or intermittent VoIP interconnection failure. This topic describes how to capture packets on Yeastar P-Series PBX System.

Procedure

  1. Log in to PBX web portal, go to Maintenance > Troubleshooting > Ethernet Capture Tool.
  2. Specify the target for packet capture.
    • Ethernet Interface: Select the interface on which to capture packets.
      • Any: Capture packets on the LAN port, WAN port, and loopback interface (127.0.0.1).
      • LAN: Capture packets on the LAN port only.
      • WAN: Capture packets on the WAN port only.
    • IP Address: Enter an IP address.

      The system captures only packets that sent to or received from the IP address.

      Note: If left blank, packets for all IP addresses will be captured.
    • Port: Enter a port number.

      The system captures only packets transmitted through the port.

      Note: If left blank, packets for all ports will be captured.
  3. Capture packets from the PBX.
    1. Click Start to begin capturing packets.
    2. Reproduce the issue of VoIP trunks or extensions.
    3. Click Stop to end packet capture.

      The captured packets are saved in the PBX local storage.

  4. Click Download to download the packet file.

Result

The captured packets are downloaded as a .tar file, which contains a .pcap file for analysis.

What to do next

Decompress the .tar file, then open the .pcap file in Wireshark software to analyze the SIP calls.

For more information, see Analyze SIP Calls in Wireshark.