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Virtual Wire

The system supports the VSwitch-based Virtual Wire. With this function enabled and the Virtual Wire interface pair configured, the two Virtual Wire interfaces form a virtual wire that connects the two subnetworks attached to the Virtual Wire interface pair together. The two connected subnetworks can communicate directly on Layer 2, without any requirement on MAC address learning or other sub network's forwarding. Furthermore, controls of policy rules or other functions are still available when Virtual Wire is used.

Virtual Wire operates in two modes, which are Strict and Non-Strict mode respectively, as detailed below:

  • Strict Virtual Wire mode: Packets can only be transmitted between Virtual Wire interfaces, and the VSwitch cannot operate in Hybrid mode. Any PC connected to Virtual Wire can neither manage devices nor access Internet over this interface.

  • Non-Strict Virtual Wire mode: Packets can be transmitted between Virtual Wire interfaces, and the VSwitch also supports data forwarding in Hybrid mode. That is, this mode only restricts Layer 2 packets' transmission between Virtual Wire interfaces, and does not affect Layer 3 packets' forwarding.

The table below lists packet transmission conditions in Strict Virtual Wire and Non-Strict Virtual Wire mode. You can choose an appropriate Virtual Wire mode according to the actual requirement.

Packet Strict Non-strict
Egress and ingress are interfaces of one Virtual Wire interface pair Allow Allow
Ingress is not Virtual Wire's interface Deny Deny
Egress and ingress are interfaces of different Virtual Wire interface pairs Deny Deny
Ingress of to-self packet is a Virtual Wire’s interface Deny Allow
Ingress is Virtual Wire's interface, and egress is a Layer 3 interface Deny Allow

Configuring a Virtual-Wire

To create a Virtual-Wire, take the following steps:

  1. Select Network > Virtual-Wire.
  2. Click New.

  3. In the Virtual-Wire Configuration dialog, select a virtual switch from the VSwitch drop-down list.
  4. In the Interface 1 drop-down list, specify an interface for the virtual wire interface pair. The two interfaces in a single virtual wire interface pair must be different, and one interface cannot belong to two different virtual wire interface pairs simultaneously.

  5. In the Interface 2 drop-down list, specify an interface for the virtual wire interface pair. The two interfaces in a single virtual wire interface pair must be different, and one interface cannot belong to two different virtual wire interface pairs simultaneously.

  6. Click OK.

Configuring the Virtual Wire Mode

To configure a virtual wire mode, take the following steps:

  1. Select Network > Virtual-Wire.
  2. Click Virtual-Wire Mode.
  3. In the Virtual-Wire Mode Configuration dialog, select a virtual switch from the VSwitch drop-down list.
  4. Specify a virtual wire mode from one of the following options:
    • Strict - Packets can only be transmitted between virtual wire interfaces, and the VSwitch cannot operate in Hybrid mode. Any PC connected to the virtual wire can neither manage devices nor access Internet over this interface.

    • Non-strict - Packets can be transmitted between virtual wire interfaces, and the VSwitch also supports data forwarding in Hybrid mode. That is, this mode only restricts Layer 2 packets' transmission between virtual wire interfaces, and does not affect Layer 3 packets' forwarding.

    • Disabled - Disables the virtual wire.

  5. Click OK.