I have a strange issue with a pair of Sonicwalls in a Stateful HA setup.
They will work fine for days then overnight they will both go deaf for 5 minutes, complete packet loss to both devices. When they come back neither unit has rebooted and all looks normal again. When i go through the logs the only entry I have is Primary missed heartbeats from Backup.
Sonicwall Support is not really helping and I am just going round in circles. We are on the latest firmware for the units.
Anyone seen this before?