fail-over; fault bypass
Technical IT term for a mechanism that automatically switches to a standby system or bypasses a faulty component to maintain service continuity.
This server has a fail-over function.
Configure a fault bypass route for the network.
冗長化 refers to redundancy in general, while 障害迂回 specifically means the fail-over or bypass action when a fault occurs.
フェイルオーバー is the common katakana loanword for fail-over, used more frequently in spoken IT contexts; 障害迂回 is a native kanji compound with the same meaning but more formal or written.
Compound of 障害 (fault, obstacle) and 迂回 (detour, bypass), literally 'fault detour'. A technical term likely coined in Japanese IT contexts.