5.5.10. Managing capture interface settings monx

5.5.10.1. Introduction

This procedure describes:

• Viewing the network settings

• Modifying these parameters

To...	Use the command	described in the procedure
obtain an overview of the information on all network interfaces	show interfaces	Procedure A
display the MTU value of the interfaces	show interfaces	Procedure B
modify the MTU value of the interfaces	set advanced-configuration mtu	Procedure B
display the available detection interfaces	show interfaces	Procedure C
manage the available detection interfaces	set interfaces	Procedure C

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5.5.10.2. Prerequisites

• User: setup

• Commands used in this procedure:

  • show network-config configuration

  • show advanced-configuration mtu

  • set advanced-configuration mtu

  • show interfaces

  • set interfaces

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5.5.10.3. Preliminary operations

• Connect to the GCap (see Procedure for connecting to the GCap via SSH).

• Stop the detection engine (see monitoring-engine).

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5.5.10.4. Procedure A: Display the network configuration

• Enter the following command.

  (gcap-cli) show interfaces
  

• Validate.
  The system displays the information of all network interfaces.

Note

The mon0, mon1, mon2 interface is enabled ( field: role, value : capture ). The enp27s0 interface is disabled ( field: role, value : inactive ).

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5.5.10.5. Procedure B: display or change the MTU value

• To display the current configuration of enabled interfaces:

  • Enter the following command.

    (gcap-cli) show interfaces
    

  • Validate.
    The system displays the result.

The values are displayed for all enabled network interfaces (*MTU* field ) 

• In our example, to change the current configuration of enabled interfaces: e.g. to change the MTU value of the mon0 interface

  • Enter the following command.

    (gcap-cli) set advanced-configuration mtu mon1 2000
    

  • Validate.
    The system displays the result.

    Updating Network MTU configuration to:
            - enp4s0: 2000
    

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5.5.10.6. Procedure C: display or change the available detection interfaces

• To display the information on the detection interfaces:

  • Enter the following command.

    (gcap-cli) show interfaces
    

  • Validate.
    The system displays the available detection interfaces.

The information displayed is:  

• Label: the label name of the interface

• Name: the system name of the interface

• Role: the role assigned to the interface

• Capture capability: if the interface can capture traffic

• MTU: the MTU of the interface

• Physical Address: the MAC address of the interface

• Speed: the interface speed

• Type: the type of cable/sfp connected to the physical port

• Vendor ID: the Vendor ID of the network card

• Device ID: the Device ID of the network card

• PCI bus: PCI bus number used by the network card

• In our example, mon0, mon1 and mon2 are enabled ( field: role, value : capture ).

• To activate an interface (here enp27s0 for example):

  • Enter the following command.

    (gcap-cli) set interfaces assign-role enp27s0 capture
    

  • Validate.

  • then to check the new configuration

     (gcap-cli) show interfaces
    

  • Validate.
    The system displays the available detection interfaces.

• To deactivate an interface (here mon0 for example):

  • Enter the following command.

   (gcap-cli) set interfaces assign-role enp27s0 inactive
  

  • Validate.

• To change the interface start-up delay by five seconds for example

  • Enter the following command.

    (gcap-cli) set interfaces delay 5
    

  • Validate.

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