Networking

How Out-of-Band (OOB) Saves Broken Networks

Network Design diagram · made in Skemio

Network diagram of an Out-of-Band setup with separate LTE backup, OOB terminal server, and isolated serial connections to core routers and firewalls.
Network diagram of an Out-of-Band setup with separate LTE backup, OOB terminal server, and isolated serial connections to core routers and firewalls.
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What it shows

  • Physically isolates console traffic from the production data plane.
  • LTE or dedicated ISP backhaul guarantees access during fiber cuts.
  • Terminal servers connect straight to RS-232 serial ports on gear.

The takeaway

Never share your management path with the data plane you rely on it to fix.

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