A local virtual network usually named VLAN, is a logical independent network. Several VLAN are able to coexist in a single "switch", as to segment a local (physical) network in "N" virtual networks, creating multiple separated broadcast domains. A VLAN also makes possible to put into a single broadcast domain, hosts with distinct phisical locations and connected to different switches. Another purpose of a virtual network is to restrict access to network resources without considering the networks phisical topology.

By many reasons (network organization, performance, privacy, safety, etc.) it is frequently necessary to segment an organization's network into several "networks/sub-networks", in other words, it is necessary to segment the broadcast domains.

The Blockbit UTM supports the addition of virtual interfaces of the "VLAN" type, and mandatorily requires a free phisical interface [EthX], which increases the capacity of your Blockbit UTM device keeping its performance and the security of your network. The VLANs use ID tags to logicaly separate devices in a network with broadcast domaisn segmented by a VLAN. These minor domains forward packets only to devices that are a part of this VLAN domain. This reduces the traffic and increases the network security.

Support to the following VLAN interfaces:

  • DOT.1Q Protocol: IEEE 802.1Q Standard;
  • ID Tags: ID 0 - 4096;
  • VLAN ID 1 – ID 4094: Interval of allowed IDs to group up IP addresses of the same network/sub-network;
  • VLAN ID 0 (zero): It is only used for high priority frames;
  • VLAN ID 1 (one): Corresponds to VLAN default. Usually used as main or single bus; 
  • VLAN ID 4095: Reserved ID VLAN . It is used for VLAN grouping;
  • IEEE 802.1p: Used to determine the service class in the Ethernet structure.



The VLAN uses the IEEE 802.1Q standard and all the commutation devices (switches) layer 2 and 3 along a route must be compatible with the 802.1Q protocol, in order to support the VLAN traffic.


In order to configure a VLAN interface, follow the next steps:


At the top right of the screen we have the Add Interface button:


Interfaces – Add Interface button


By clicking on this button the menu below is displayed:


Interfaces – Add Interface button - Menu


The menu consists of the options:



Below we will analyze each option in detail.


For more information on how to configure 3G / 4G / LTE interfaces, visit this page.

For more information on the action menu, visit this page.

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