Backbone and data-center interconnect links fail in predictable ways when capacity planning treats peak utilization as the only signal. Optical lead times, bursty traffic patterns, and shared failure domains all require planning models that operations teams can actually execute against.
Define targets before you buy capacity
- Separate steady-state utilization from burst and failover headroom.
- Model growth by workload type — general-purpose, storage replication, AI east-west.
- Align optical and routing upgrade windows with procurement lead times.
- Document what happens to traffic when a path or site fails.
Connect planning to operations
Capacity plans that live only in spreadsheets become stale within a quarter. Tie utilization thresholds to monitoring, escalation paths, and pre-approved expansion triggers. The goal is to order capacity before links become operationally fragile — not after an incident forces the decision.