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How do I replace one of the devices in an existing hardware failover pair?

If one of the units in a hardware failover pair requires a replacement, the following procedure needs to be followed so the new unit can communicate hardware failover information properly with the existing (working) device. Please contact our Technical Support team with any questions or for assistance with this process.

Instructions for installing a new unit in a hardware failover pair (firmware version 8.3.x or higher):

1. Disable Hardware Failover on the Primary Device. NOTE: If replacing the PRIMARY device, configure the existing SECONDARY device to PRIMARY and save.
2. On the existing device, use the command line interface (SSH or console session) command: hwfo reset-auth to clear existing authentication information. This is required to remove old ssh keys and passwords for the dead replaced device.
3. After Authentication is reset, re-enable Hardware Failover on the Primary device. Make sure the existing PRIMARY device is active and healthy (Heartbeat status shows 'UP').
4. Before cabling the new replacement device into the network, make sure it is either set to System Default settings or has been pre-configured properly as the SECONDARY device. If necessary, configure the new device as SECONDARY with the Keep-Alive Port and VLAN settings the same as the PRIMARY, and the Local and Remote Address settings the reverse of the PRIMARY.
5. Perform the CLI command hwfo reset-auth on this new device. Power down the new replacement device.
6.Cable the new device into the network in parallel with the existing device and power the device back on. Verify that both devices show Heartbeat status 'UP'.
7. On either device perform a 'Replicate to Idle' from either the command line interface or the Hardware Failover web page.

Instructions for installing a new unit in a hardware failover pair (firmware version 7.3 or higher, up to 8.2.x):

1. Disable Hardware Failover on the Primary Device. NOTE: If replacing the PRIMARY device, configure the existing SECONDARY device to PRIMARY and save.
2. On the existing device, use the text interface menu Configure Hardware Failover->Reset Failover Authentication to clear existing authentication information. This is required to remove old ssh keys and passwords for the dead replaced device.
3. After Authentication is reset, re-enable Hardware Failover on the Primary device. Make sure the existing PRIMARY device is active and healthy (Heartbeat status shows 'UP').
4. Before cabling the new replacement device into the network, make sure it is either set to System Default settings or has been pre-configured properly as the SECONDARY device. If necessary, configure the new device as SECONDARY with the Keep-Alive Port and VLAN settings the same as the PRIMARY, and the Local and Remote Address settings the reverse of the PRIMARY.
5. Perform the text interface Configure Hardware Failover->Reset Failover Authentication on this new device. Power down the new replacement device.
6.Cable the new device into the network in parallel with the existing device and power the device back on. Verify that both devices show Heartbeat status 'UP'.
7. On either device perform a 'Replicate to Idle' from either the text interface or the Hardware Failover web page.

 

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