SonicOS 7 System

Technical Documentation > SonicOS 7 System > Interfaces > Interface Settings IPv4 > Layer 2 Bridged Mode > Comparing L2 Bridged Mode to Transparent Mode > VLAN Support in L2 Bridged Mode

VLAN Support in L2 Bridged Mode

On SonicWall firewalls, L2 Bridged Mode provides fine control over 802.1Q VLAN traffic traversing an L2 Bridge. The default handling of VLANs is to allow and preserve all 802.1Q VLAN tags as they pass through an L2 Bridge, while still applying all firewall rules, and stateful and deep-packet inspection to the encapsulated traffic. It is further possible to specify white/black lists for allowed/disallowed VLAN IDs through the L2 Bridge.

This allows an appliance operating in L2 Bridged Mode to be inserted, for example, inline into a VLAN trunk carrying any number of VLANs, and to provide full security services to all IPv4 traffic traversing the VLAN without the need for explicit configuration of any of the VLAN IDs or subnets. Access Rules can also, optionally, be applied to all VLAN traffic passing through the L2 Bridged Mode because of the method of handling VLAN traffic.

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