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Why does nobody talk about failover circuits going down silently

Had a primary MPLS link drop at 3 AM last Thursday and our backup LTE didn't kick in because the Cradlepoint had a firmware bug that nobody caught in 8 months. The failover tested fine with pings but the actual VPN tunnel never came up until I drove to the site and rebooted it manually. How does everyone else verify their backup circuits are actually working?
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2 Comments
wendy_garcia16
Man that is the worst feeling when you think you have backup and it just silently fails.
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brookekelly
Heard a tech guy on a podcast say silent failures are the scariest kinds of bugs.
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