SonicWALL 3500 User Manual

Page of 74
SonicWALL NSA 5000/4500/3500 Getting Started Guide  
Page 19
Scenario C: L2 Bridge Mode
For network installations where the SonicWALL NSA Series is 
running in tandem with an existing network gateway. 
In this scenario, the original gateway is maintained. The 
SonicWALL NSA Series is integrated seamlessly into the 
existing network, providing the benefits of deep packet 
inspection and comprehensive security services on all network 
traffic.
L2 Bridge Mode employs a secure learning bridge architecture, 
enabling it to pass and inspect traffic types that cannot be 
handled by many other methods of transparent security 
appliance integration. Using L2 Bridge Mode, a SonicWALL 
security appliance can be non-disruptively added to any 
Ethernet network to provide in-line deep-packet inspection for 
all traversing IPv4 TCP and UDP traffic. L2 Bridge Mode can 
pass all traffic types, including IEEE 802.1Q VLANs, Spanning 
Tree Protocol, multicast, broadcast and IPv6.
To set up this scenario, follow the steps covered in the
 
and the
sections. If you 
have completed setup procedures in those sections, continue to 
th
complete configuration.
SonicWALL NSA
Third Party Gateway 
Internet or 
LAN Segment 2 
L2 Bridge Link 
C
Network Security Appliance
NSA