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This pilot fish does tech support for a security appliance vendor, whose customers tend to get really concerned when the security black box isn't doing its thing.
"One of the configurations we sold and supported was a pair of appliances in high-reliability mode, so that if one failed the other would take over," says fish
"One customer kept complaining that the pair of appliances could not talk to each other and, of course, failed to fail-over under test circumstances. Since they were fairly close, my manager and I went to pay them a visit in person.
"First the customer demonstrated that, while one unit seemed to work properly, the backup unit could never be seen on the network.