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SonicOS 5.8.1 Administrator Guide
Port Redundancy Failover
SonicWALL provides multiple methods for protecting against loss of connectivity in the case of
a link failure, including High Availability (HA), Load Balancing Groups (LB Groups), and now
Port Redundancy. If all three of these features are configured on a firewall, the following order
of precedence is followed in the case of a link failure:
1. Port Redundancy
2. HA
3. LB Group
When Port Redundancy is used with HA, Port Redundan
cy takes precedence. Typically an
interface failover will cause an HA failover to occur, but if a redundant port is available for that
interface, then an interface failover will occur but not an HA failover. If both the primary and
backup redundant ports go down, then an HA failover will occur (assuming the backup firewall
has the corresponding port active).
When Port Redundancy is used with a LB Group, Port Redundancy again takes precedence.
Any single port (primary or backup) failures are handled by Port Redundancy just like with HA.
When both the ports are down then LB kicks in and tries to find an alternate interface.
Port Redundancy Configuration
To configure Port Redundancy, perform the following tasks:
1. On the Network > Interfaces page, click the configure icon for the interface that is to be
designated the master of the Link Aggregation Group. The Edit Interface window displays.
2. Click on the Advanced tab.
3. In the Redundant/Aggregate Ports pulldown menu, select Port Redundancy.
4. The Redundant Port pulldown menu is displayed, with all of the currently unassigned
interfaces available. Select one of the interfaces.
Note After an interface is selected as a Redundant Port, its configuration is governed by the
primary interface and it can not be configured independently. In the Interface Settings table,
the interface's zone is displayed as "Redundant Port" and the configuration icon is removed.
5. Set the Link Speed for the interface to Auto-Negotiate.
6. Click OK.