- Products
- Network Security
- Threat Protection
- Secure Access Service Edge (SASE)
- Cloud Security
- Endpoint Security
- Email Security
- Secure Access
-
Wi-Fi 6 Access Points
SonicWall SonicWave 600 series access points provide always-on, always-secure connectivity for complex, multi-device environments.
Read More
- Solutions
- Industries
- Use Cases
- Solutions Widgets
- Solutions Content Widgets
Federal
Protect Federal Agencies and Networks with scalable, purpose-built cybersecurity solutions
- Solutions Image Widgets
-
- Partners
- SonicWall Partners
- Partner Resources
- Partner Widgets
- Custom HTML : Partners Content WIdgets
Partner Portal
Access to deal registration, MDF, sales and marketing tools, training and more
- Partners Image Widgets
-
- Support
- Support
- Resources
- Capture Labs
- Support Widget
- Custom HTML : Support Content WIdgets
Support Portal
Find answers to your questions by searching across our knowledge base, community, technical documentation and video tutorials
- Support Image Widgets
-
- COMPANY
- PROMOTIONS
- MANAGED SERVICES
- Contact Sales
-
- Menu
- Solutions
- Solutions Widgets
- Solutions Image Widgets
-
- Solutions Widgets
- Partners
- Partner Widgets
- Partners Image Widgets
-
- Partner Widgets
- Support
- Support Widget
- Support Image Widgets
-
- Support Widget
- Solutions
- Solutions Widgets
- Solutions Image Widgets
-
- Solutions Widgets
- Partners
- Partner Widgets
- Partners Image Widgets
-
- Partner Widgets
- Support
- Support Widget
- Support Image Widgets
-
- Support Widget
SonicOS: How does ARP work when a SonicWall appliance is configured in L2 Bridge Mode?
03/26/2020 
10 People found this article helpful
193,936 Views
Description
SonicOS: How does ARP work when a SonicWall appliance is configured in L2 Bridge Mode?
Resolution
ARP in L2 Bridge Mode
L2 Bridge Mode employs a learning bridge design where it will dynamically determine which hosts are on which interface of an L2 Bridge (referred to as a Bridge-Pair). ARP is passed through natively, meaning that a host communicating across an L2 Bridge will see the actual host MAC addresses of their peers. For example, the Workstation communicating with the Router (192.168.0.1) will see the router as 00:99:10:10:10:10, and the Router will see the Workstation (192.168.0.100) as 00:AA:BB:CC:DD:EE.
This behavior allows for a SonicWall operating in L2 Bridge Mode to be introduced into an existing network with no disruption to most network communications other than that caused by the momentary discontinuity of the physical insertion.
It should be noted that stream-based TCP protocols communications (for example, an FTP session between a client and a server) will need to be re-established upon the insertion of an L2 Bridge Mode SonicWall. This is by design so as to maintain the security afforded by stateful packet inspection (SPI); since the SPI engine can not have knowledge of the TCP connections which pre-existed it, it will drop these established packets with a log event such as TCP packet received on non-existent/closed connection; TCP packet dropped.
Source: L2 Bridge Mode and Transparent Mode Deployment Guide
Related Articles
- Identical Access Rules for different users/user groups
- Advanced Network Security eLearning Training Course
- Network Security Essentials eLearning Training Course
Categories
- Firewalls > TZ Series
- Firewalls > SonicWall SuperMassive E10000 Series
- Firewalls > SonicWall SuperMassive 9000 Series
- Firewalls > SonicWall NSA Series
YES
NO