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As a layer 2 switch, the Branch Gateway requires an external router to route traffic between VLANs Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN.. The Branch Gateway can also operate as a layer 3 switch that can route traffic between VLANs.
You can configure one or more physical ports on the Branch Gateway to be a member of a VLAN. Additionally, each wireless client association constitutes a connection to a virtual port on the Branch Gateway, with membership in a specified VLAN. You can place all authenticated wireless users into a single VLAN or into different VLANs, depending on your network requirements. You can also configure an IP address and netmask for a VLAN. The IP address is up when at least one physical port in the VLAN is up. The VLAN IP address can be used as a gateway by external devices; packets that are not destined for the Branch Gateway and directed to a VLAN IP address are forwarded according to the Branch Gateway’s IP routing table.
For the SD-WAN Software-Defined Wide Area Network. SD-WAN is an application for applying SDN technology to WAN connections that connect enterprise networks across disparate geographical locations. deployment, each Branch Gateway requires VLAN interfaces for WAN Wide Area Network. WAN is a telecommunications network or computer network that extends over a large geographical distance. uplinks and LANs. Each VLAN must have a unique VLAN ID assigned to it. By default, the Branch Gateways are pre-configured with the VLAN 4094.
See the following topics for instructions on configuring VLANs:
