CONCEPT Cited by 1 source
Triple-redundant transmission path¶
N+2 path redundancy for show-critical live broadcast contribution feeds: every primary member-facing stream leaves the venue over three completely discrete transmission paths, each with independent hardware + independent power, so that two simultaneous leg failures can be tolerated without losing the show.
Netflix's hierarchy¶
Per the 2026-04-17 Human Infrastructure post, the three legs follow a strict priority order:
- Dedicated video fiber (highest priority)
- Single-feed satellite links
- Dedicated enterprise-grade internet + SRT contribution (fallback IP leg)
Each leg must be physically and electrically independent of the others:
- Separate router line cards inside the production truck
- Discrete transmission hardware (no shared cards, chassis, or optics between legs)
- Two discrete power sources per piece of transmission hardware
- UPS batteries on every leg
- Surge conditioning at every input
Why three, not two¶
One leg fails on you routinely — fiber cut, satellite weather, ISP brownout. With only two, a single leg failure leaves you running unprotected against the next failure. The third leg keeps you protected against a second coincident failure during the duration of the event. Broadcast has "no ability to pause or roll back" (Netflix's framing), so the design target is "survive two uncorrelated failures during the show."
Receiver-side termination¶
The three legs are terminated at the BOC by SMPTE 2022-7 seamless switching — the receiver merges the active legs packet-by-packet and conceals single-leg dropouts below the viewer-visible threshold. Sending redundant paths without a seamless-switching receiver would give you observable failovers.
Seen in¶
- 2026-04-17 — sources/2026-04-17-netflix-the-human-infrastructure-live-operations — canonical wiki instance. Netflix's triple-redundant contribution discipline is the venue-side counterpart to the BOC's SMPTE 2022-7 termination.