The Importance of Software Upgrades in Runtime

Eric Schmidt: Is there any interesting stories where you did an upgrade somewhere and something weird happened? I don't want to say too much. It wasn't me, but their friends of mine, it was a product. The XE 3L1 switch had been running for three years without any problems or outages. And after three years, Eric so went to this customer said, hey, you need to upgrade your system because we're not going to support the version you're on anymore. So they panic and ran the scripts on the standby node, which had become active and tried to renew it and try to upgrade it. Even there, nothing worked.