FAILOVER(8) NUT Manual FAILOVER(8) (NAME) failover - (UPS Failover Driver) (SYNOPSIS) failover -h failover -a UPS_NAME [OPTIONS] failover . nutupsdrv(8) . (DESCRIPTION) failover <<>> UPS . UPS UNIX ( Windows) <<>> (primary) . failover UPS primary UPS . ( upsmon(8) upsc(8)) failover UPS UPS . UPS : o o / UPS o ( OL LB ...) o (force.primary force.ignore) (failover). upsd(8) (stale) . (fallback) : o (stale) o ALARM (stale) o ALARM (FSD) UPS ( USB Serial Ethernet). failover upsd(8) . (EXTRA ARGUMENTS) : port=drivername-devicename,drivername2-devicename2,... . ( Windows) UPS . drivername-devicename NUT ( usbhid-ups-myups) . . inittime=seconds . . . . . deadtime=seconds . UPS (dead) . . relogtime=seconds . UPS (log spam) . . noprimarytime=seconds . (fsdmode). . maxconnfails=count . UPS (coolofftime). . coolofftime=seconds . maxconnfails . . fsdmode=0|1|2 . noprimarytime . 0 . o 0: (stale) . UPS . upsmon(8) ( ) UPS . o 1: ALARM ( ) (stale) . upsmon(8) UPS MINSUPPLIES (FSD) . o 2: ALARM FSD . FSD upsmon(8) . FSD . checkruntime=0|1|2|3 . battery.runtime UPS . strictfiltering . 1 . o 0: . (runtime) . port . o 1: battery.runtime. UPS . UPS . o 2: battery.runtime.low. UPS . UPS . o 3: . UPS battery.runtime battery.runtime.low . UPS . strictfiltering=0|1 . 1 UPS . 0 ( (PRIORITIES) ). 0 . status_have_any=OL,CHRG,... . ups.status UPS . . status_have_all=OL,CHRG,... . ups.status UPS . . status_nothave_any=OB,OFF,... . ups.status UPS . . status_nothave_all=OB,LB,... . ups.status UPS . . status_* UPS . OL ALARM OL . strictfiltering PRIORITIES . . (IMPLEMENTATION) port ups.conf(5) ( Windows) <<>> UPS . : [realups] driver = usbhid-ups port = auto [realups2] driver = usbhid-ups port = auto [failover] driver = failover port = usbhid-ups-realups,usbhid-ups-realups2 upsmon(8) UPS failover . UPS (upscmd(8) upsrw(8) -w). upstream. failover . : o .force.ignore [seconds] UPS . 0 . o .force.primary [seconds] UPS . 0 . 0 . (PRIORITIES) : o 0 (): UPS . o 1: UPS . o 2: UPS ( OL). o 3: UPS . o 4 (): UPS . UPS port . : 1. status_nothave_any () 2. status_have_all 3. status_nothave_all 4. status_have_any () strictfiltering . . UPS UPS . UPS . (RATIONALE) UPS upsmon(8) . failover upsmon(8) . failover (dual-PSU) UPS - UPS ( STS/ATS) . (graceful degradation) . clone clone(8) clone-outlet(8) (outlet) . NUT UPS . failover . / upsmon(8) . (LIMITATIONS) failover UPS UPS . . checkruntime battery.runtime battery.runtime.low . UPS NUT NUT . (AUTHOR) Sebastian Kuttnig (SEE ALSO) upscmd(8) upsrw(8) ups.conf(5) upsc(8) upsmon(8) nutupsdrv(8) clone(8) clone-outlet(8) : NUT (Network UPS Tools): Network UPS Tools 2.8.5 06/21/2026 FAILOVER(8)