Problem
DNS failure prevents the production system from resolving the ingest endpoint.
Solution
Root Cause / Diagnostic:
Relying on default ISP-provided DNS resolvers leaves production infrastructure vulnerable to local DNS cache poisoning, upstream ISP outages, or high resolution latency. When an encoder attempts to resolve `[link removed]` or custom SRT endpoints during a network hiccup, DNS lookup timeouts cause immediate socket connection failures, preventing the broadcast from initiating or reconnecting.
Actionable Fix:
1. Configure static public DNS resolvers on the broadcast workstation’s network adapter: primary to Google DNS (`8.8.8.8`) and secondary to Cloudflare DNS (`1.1.1.1`).
2. Add redundant tertiary DNS addresses (`8.8.4.4` and `1.0.0.1`) at the hardware router/DHCP server level to ensure network-wide query resilience.
3. Flush the local operating system DNS resolver cache via terminal (`ipconfig /flushdns` on Windows or `sudo dscacheutil -flushcache` on macOS) prior to air.
Pro Tip:
For mission-critical broadcasts, resolve and document the current IP ranges of YouTube's ingest servers, or use a local caching DNS proxy (like Pi-hole or Unbound) with pre-fetched records.
Relying on default ISP-provided DNS resolvers leaves production infrastructure vulnerable to local DNS cache poisoning, upstream ISP outages, or high resolution latency. When an encoder attempts to resolve `[link removed]` or custom SRT endpoints during a network hiccup, DNS lookup timeouts cause immediate socket connection failures, preventing the broadcast from initiating or reconnecting.
Actionable Fix:
1. Configure static public DNS resolvers on the broadcast workstation’s network adapter: primary to Google DNS (`8.8.8.8`) and secondary to Cloudflare DNS (`1.1.1.1`).
2. Add redundant tertiary DNS addresses (`8.8.4.4` and `1.0.0.1`) at the hardware router/DHCP server level to ensure network-wide query resilience.
3. Flush the local operating system DNS resolver cache via terminal (`ipconfig /flushdns` on Windows or `sudo dscacheutil -flushcache` on macOS) prior to air.
Pro Tip:
For mission-critical broadcasts, resolve and document the current IP ranges of YouTube's ingest servers, or use a local caching DNS proxy (like Pi-hole or Unbound) with pre-fetched records.