PCAPng Application

The PCAPng application reads the various blocks in the received PCAPng files and validates the blocks to be sent to the destination application or to the tools. The PCAPng file contains the following blocks:

  • Mandatory Blocks
    • Section Header Block (SHB)
  • Optional Blocks
    • Interface Description Block (IDB)
    • Enhanced Packet Block (EPB)
    • Simple Packet Block
    • Name Resolution Block
    • Interface Statistics Block

Note:  The PCAPng application is only applicable for the Ericsson 5G Core vTAP architecture. for detailed information.

The actual packets are present in the Enhanced Packet Block. The block data is parsed to find the start and end offset of the valid packets and the packet is sent out to the next application.

Note:  Only one EPB in a PCAPng file is supported.

The PCAPng application processes the data depending on the packet type that contains a combination of the blocks mentioned above:

Block Combination



Packets are parsed, validated, and the data packet is sent out.


Packets are dropped.


Packets are parsed, validated, and the data packet is sent out.

The PCAPng application validates if the incoming data matches any of the above three formats in the same order, and processes the packets accordingly.

The following figure shows a sample PCAPng file format that contains one section header block:

Create Link Between UDP-in-GRE Tunnel and PCAPng Application

To create a link with source as UDP-in-GRE tunnel and destination as PCAPng application:

  1. In the GigaVUE‑FM canvas, select New > New Tunnel, drag and drop a new tunnel template to the workspace. The Add Tunnel Spec quick view appears.
  2. On the New Tunnel quick view, enter or select the required information as described in the following table.




    The name of the tunnel endpoint

    Note:  Do not enter spaces in the alias name.


    The description of the tunnel endpoint


    Select UDPGRE as the tunnel type

    Traffic Direction

    The direction of the traffic flowing through the V Series node

    • Choose In (Decapsulation) for creating an Ingress tunnel, traffic from the source to the V Series node

    IP Version

    The version of the Internet Protocol. Select IPv4 or IPv6

    Remote Tunnel IP

    The IP address of the tunnel source


    GRE key value

    Source L4 Port

    Layer 4 source port number

    Destination L4 Port

    Layer 4 destination port number. You can configure only 4754 or 4755 as the destination UDP ports

  3. Click Save.
  4. Click and drag the PCAPng application into the canvas. Configure the alias for the application.
  5. Establish a link between the UDP-GRE TEP configured above and the PCAPng application.

Create Link Between PCAPng Application and Other Destinations

Create a link with source as PCAPng application and destination as one of the following:

  • Other GigaSMART applications such as Slicing, Masking, etc.
  • Other encapsulation TEPs.

Refer to the following image for a sample configuration.