Capture Network Packet

This topic describes how to capture packets on LAN port, WAN port, or loopback address of your local network interface card (NIC).

Background information

Ethernet Capture Tool may be required to capture packets in the following situations:
  • Extension registration failure.
  • No audio or one-way audio during a call.
  • Occasional VoIP interconnection failure.

Procedure

  1. Log in to PBX management portal, go to Maintenance > Troubleshooting > Ethernet Capture Tool.
  2. In the Ethernet Interface drop-down list, set where you want to capture packets.
    • Any: Capture the packets on LAN port, WAN port, and loopback address (127.0.0.1) of your local network interface card (NIC).
    • LAN: Capture the packets on LAN port.
    • WAN: Capture the packets on WAN port.
  3. Optional: In the IP Address field, enter an IP address. The system will only capture packets that travel to or from the IP address.
    Note: If you don't set an IP address, the PBX will capture packets for all the IP addresses.
  4. Optional: In the Port field, enter a port. The system will only capture packets that go through the port.
    Note: If you don't set a port, the PBX will capture packets for all the ports.
  5. Click Start.

    The PBX starts to capture the Ethernet packet. During the time period, you should reproduce the problem of your VoIP trunks or extensions.

  6. Click Stop to stop capturing.

    The packets are intercepted and saved on PBX's local flash.

  7. Click Download to download the captured packet.

What to do next

Decompress the .tar file and use Wireshark software to open the packet file.