Configuring High Availability (Hardware Failover) SonicWALL requires the following:
1. Two SonicWALLs of the same model (TZ 200 and up).
2. Both SonicWALLs need to be registered at MySonicWALL.com (regular registration, and then one as HF Primary, one as HF Secondary).
3. The same firmware versions need to be on both SonicWALLs.
4. Static IP addresses are required for the WAN Virtual IP interface (you can’t use DHCP).
5. Three LAN IP addresses (one for Virtual IP, one for the management IP, and one for the Backup management IP).
6. Cross over cable (to connect SonicWALLs to each other) on the last ethernet interfaces.
7. 1 hub or switch for the WAN port on each SonicWALL to connect to.
8. 1 hub or switch for the LAN port on each SonicWALL to connect to.
1. High Availability cannot be configured if “built-in wireless is enabled”.
2. On NSA 2400MX units, High Availability cannot be configured if PortShield is enabled.
3. Stateful HA is not supported for connections on which DPI-SSL is applied.
4. On TZ210 units the HA port/Interface must be UNASSIGNED before setting up HA (last available copper ethernet interfaces).
1. Register both SonicWALLs at MySonicWALL as High Availability Pairs BEFORE connecting them to each other:
• “Associating an Appliance at First Registration”: http://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=6233#Associating_an_Appliance_at_First_Registration_
• “Associating Pre-Registered Appliances”: http://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=6235#Associating_Pre-Registered_Appliances
• “Associating a New Unit to a Pre-Registered Appliance”: http://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=6236#Associating_a_New_Unit_to_a_Pre-Registered_Appliance
2. Login to Primary HF and configure the SonicWALL (firewall rules, VPN, etc).
3. Connect the SonicWALLs to each other on their last ethernet ports using a cross over cable.
4. Connect the WAN port on both SonicWALLs to a switch or hub using straight through (standard) ethernet cables, and then connect the switch to your upstream device (modem, router, ADTRAN, etc.)
5. Ensure the Primary HF can still communicate to the Internet.
6. Connect the LAN port on both SonicWALLs to a switch or hub using straight through (standard) ethernet cables, and then connect them to your main LAN switch (if you don’t have one, you should purchase one. This will be the switch that all your LAN nodes connect to.).
7. Go to High Availability > Settings.
8. Select the Enable High Availability checkbox.
9. Under SonicWALL Address Settings, type in the serial number for the Secondary HF (Backup SonicWALL). You can find the serial number on the back of the SonicWALL security appliance, or in the System > Status screen of the backup unit. The serial number for the Primary SonicWALL is automatically populated.
10. Click Accept to save these settings.
Configuring Advanced High Availability Settings
1. Click High Availability > Advanced.
2. Put a check mark for Enable Preempt Mode.
3. Put a check mark for Generate / Overwrite Backup Firmware and Settings when Upgrading Firmware.
4. Put a check mark for Enable Virtual MAC.
5. Leave the Heartbeat Interval at default (5000ms).
6. Leave the Probe Interval at default (no less than 5 seconds).
7. Leave Probe Count and Election Delay Time at default.
8. Ensure there’s a checkmark for Include Certificates/Keys.
9. Press Synchronize settings.
Configuring High Availability > Monitoring Setting
(Only do the following on the primary unit, they will be sync’d with the secondary unit).
1. Login as the administrator on the Primary SonicWALL.
2. Click High Availability > Monitoring.
3. Click the Configure icon for an interface on the LAN (ex. X0).
4. To enable link detection between the designated HA interface on the Primary and Backup units, leave the Enable Physical Interface monitoring checkbox selected.
5. In the Primary IP Address field, enter the unique LAN management IP address.
6. In the Backup IP Address field, enter the unique LAN management IP address of the backup unit.
7. Select the Allow Management on Primary/Backup IP Address checkbox.
8. In the Logical Probe IP Address field, enter the IP address of a downstream device on the LAN network that should be monitored for connectivity (something that has an address that’s always turned on like a server or managed switch).
9. Click OK.
10. To configure monitoring on any of the other interfaces, repeat the above steps.
11. When finished with all High Availability configuration, click Accept. All changes will be synchronized to the idle HA device automatically.
Testing the Configuration
1. Allow some time for the configuration to sync (at least a few minutes). Power off the Primary SonicWALL. The Backup SonicWALL should quickly take over.
2. Test to ensure Internet access is OK.
3. Test to ensure LAN access is OK.
4. Log into the Backup SonicWALL using the unique LAN address you configured.
5. The management interface should now display “Logged Into: Backup SonicWALL Status: (green ball)”. If all licenses are not already synchronized with the Primary SonicWALL, go to System > Licenses and register this SonicWALL on mysonicwall.com. This allows the SonicWALL licensing server to synchronize the licenses.
6. Power the Primary SonicWALL back on, wait a few minutes, then log back into the management interface. The management interface should again display “Logged Into: Primary SonicWALL Status: (green ball)”.
NOTE: Successful High Availability synchronization is not logged, only failures are logged.