Video & projection
Blackmagic Ethernet Switch 820 troubleshooting
The Blackmagic Ethernet Switch 820 problems live-event techs bring to Ask Roadie most (also called 100G Ethernet Switch). Pick your symptom, or describe your own in plain words, and get the likeliest fix first, with the manual page when there is one.
Common Ethernet Switch 820 errors & problems
What techs run into most, and what's usually behind it. The step-by-step fix for your exact unit is in Ask Roadie.
- Step-by-step fixGet the fix →
A 100G QSFP28 port will not link / the module is seen but no light
Likely cause: The 100G ports are QSFP28 sockets with no modules included, so nearly every early failure is a module, coding or fiber-cleanliness problem rather than a switch fault.
- Step-by-step fixGet the fix →
Baseline specs and port map — what is actually on the back of an Ethernet Switch 820
Likely cause: Techs pulling an 820 out of the case expect a 360P-style button panel and an SDI monitor out.
- Step-by-step fixGet the fix →
Blackmagic Ethernet Switch Setup does not see the switch / where is the USB port
Likely cause: Every tech trained on the 360P reaches for a USB cable first and concludes the unit is dead when nothing enumerates.
- Step-by-step fixGet the fix →
Config is a mess after a show / need to get the switch back to a known state
Likely cause: A reset is cheap and fast compared to unpicking someone elses multicast config at 6am, but it is destructive of the management address — losing that on a rear-only-connector 1RU in a packed rack turns a two-minute job into pulling the unit.
- Step-by-step fixGet the fix →
How much power does it draw / how do I size the circuit — and how do I wire the two power inlets
Likely cause: The published spec is genuinely incomplete, so any number a tech repeats is invented.
- Step-by-step fixGet the fix →
New 2110 device does not appear in the source list on the front panel for routing
Likely cause: NMOS is what makes the 820 routable from a spin knob instead of a spreadsheet of multicast addresses, so the whole operator workflow collapses to nothing when mDNS is broken.
- Step-by-step fixGet the fix →
PTP was locked, then broke as soon as multicast/IGMP was configured — or streams die after a few minutes
Likely cause: A 2110 fabric fails in two directions: too little multicast control (memberships time out, streams vanish) and too much (PTP cannot join).
- Step-by-step fixGet the fix →
PTP will not lock, or devices drift and pictures glitch intermittently
Likely cause: PTP failures almost never announce themselves as a clock error — they show up as intermittent glitching on air, which techs chase as a cable or encoder fault.
- Step-by-step fixGet the fix →
Switch runs hot, fans ramp loud, or it shuts down in a packed rack or flypack
Likely cause: Blackmagic markets this design as quiet, and it is, so techs read a loud 820 as normal variation.
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What firmware version should my 820 be on
Likely cause: Recording the gap honestly is better than a number that gets repeated on a show floor.
Not on the list? Describe it your way, or paste the error code off the display. Ask Roadie works the problem with you until it's fixed or you have a clear next move.
How Ask Roadie helps with the Ethernet Switch 820
- 1. Pick the Blackmagic Ethernet Switch 820. It's already in the list.
- 2. Describe what you're seeing. In your own words, or the error code off the screen.
- 3. Get the likeliest fix first. Steps in order, the manual page when there is one, and a note when other techs have confirmed it.
- 4. Still broken? Tap 👎 and it keeps going from where you left off.
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