Which order is accurate for a firmware upgrade on MX appliances in a high-availability configuration?

Question

Russell Ang · Accepted Answer

starts on the primary MX appliance and then occurs on the secondary MX appliance

Russell Ang · Answer

starts on the secondary MX appliance and then occurs on the primary MX appliance

Russell Ang · Answer

starts on both MX appliances at the same time and then reboots both appliances after traffic on the primary MX appliance ceases

Russell Ang · Answer

starts on both MX appliances at the same time and then immediately reboots both appliances

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