Views:
Traffic capture enables permitted users to view and manage traffic capture files residing either on the SMS or on a managed device. A traffic capture file contains one or more packets captured by a device on a single segment or all segments.
Users can see the files for only one device at a time. Traffic capture files are saved in PCAP format and support either an internal or external viewer. Traffic capture files on the SMS are placed in the backup restore area of the SMS drive. Traffic captures placed on an SMS are not sent to the secondary HA system.

Procedure

  1. Select Devices → All Devices, select a device and then select Traffic Capture.
  2. In the Current Traffic Capture area, click New to create a new traffic capture.
  3. In the New Traffic Capture dialog, specify the following information:
    • Name — Name of the new traffic capture file.
    • Segment — Segment on which traffic is captured.
    Note
    Note
    The TPS (TX Series) device segments indicate slot number and segment number.
    • Maximum Packets — Maximum number of packets of the capture file (from 1 to 10,000 packets).
    • Maximum File Size — maximum size of the capture file (from 1 to 10,000,000 bytes).
    • TCPDump Expression — Expression based on standard TCPDump parameters that refines the types of packets that are captured.
      Note
      Note
      When you want to capture MAC-in-MAC (IEEE 802.1ah) traffic, keep the following points in mind:
      • Device support for MAC-in-MAC is limited to the TPS 8200TX and 8400TX devices.
      • You can verify the device recognizes MAC-in-MAC traffic by running the debug np stats show npParseStatsInst CLI command on the device or by taking a packet capture. When you configure the packet capture, specify a TCPDump expression that identifies the Backbone MAC address (B-MAC) or Backbone VLAN identifier (B-VID) of the traffic you want, or capture all packets for particular segment.
  4. Click OK.
  5. (Optional) Click Stop to stop all current traffic capture on the devices. A confirmation message is displayed.
  6. (Optional) Click Refresh Statistics to refresh the current traffic capture statistics.