ISP Routing Evidence Checklist: How to Prove a Bad Path

If wired is unstable and only some regions feel bad, it might be routing. Use this evidence checklist so ISP support can’t hand-wave the issue away.
Published:
Aleksandar Stajic
Updated: February 23, 2026 at 01:15 PM

Routing issues are real, but support won’t act on feelings. You need evidence: consistent times, reproducible tests, and proof that the problem persists on Ethernet with minimal background load.

Evidence Checklist

  1. Wired test results (remove Wi-Fi).
  2. Time-of-day pattern notes (3+ days).
  3. Under-load vs idle comparison (bufferbloat ruled out).
  4. Multiple targets/regions (not one server only).
  5. Screenshots/logs of spikes and loss symptoms.

What to Say to Support

  • Issue is reproducible on Ethernet, minimal load.
  • Not a Wi-Fi/interference problem.
  • Time windows and patterns documented.
  • Request line quality and routing escalation.

Rule: don’t escalate until you’ve isolated your local path. Evidence turns ‘maybe’ into action.

Related Guides

Jitter Spikes Checklist

Find the trigger before escalation.

Packet Loss Triage

Loss evidence and isolation.

Modem/ONT Issues

Rule out the physical/link layer.

Matchmaking Lag Myths

Routing can vary per match.

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