Question: In 6.3 what are the Heart-beat messages exchanged between master and local/standby controllers when "Centralized Image Upgrade" is enabled/initiated?
In a master-local setup the controllers exchange heart beat every 10 seconds; along with this heart beat messages "Centralized Image Upgrade" feature also exchange 3 TLV’s messages in the heart beat interval.
Below are the 3 TLVs heat beat messages,
It’s a value set by the Local controller informing to the master about its current Image/built/built-on information’s.
The value is pushed by Master controller informing local controllers about the image which they needs to upgrade from the server
In case of any upgrade failure this error code is set by the local/standby controllers informing master about the failure; these error messages would be logged on both the maser/local controllers.