Eric Kuhnke wrote:
Most, if not all, redundant systems have a single instance of synchronization protocol.
Last year, a Boeing in flight over the middle of the pacific ocean had its entire glass cockpit system go dark. After frantic conversation with the air traffic controllers a decision was made to toggle the circuit breakers for the TRIPLE-REDUNDANT computer system onboard, which brought back the displays. Even with a 2+1 setup, things can still go wrong...
One significant vendor of packet forwarding gear was known for hanging the secondary
RP almost every time when the primary failed. The hang was usually associated with
chatter failing with the failed card :-)
Pete
