Wan Circuit Triage

Triage WAN circuit faults from optics to BGP. Use when a DIA, MPLS, or P2P circuit is down, errored, or saturating and you need an ISP-ready package.

gesh75 Updated

File contents

WAN circuit triage

Do not use for SD-WAN policy (use sdwan-overlay-architect). Not for LAN.

Procedure

  1. Identify the circuit ID, A/Z ends, last-mile vendor, and the logical overlay color.
  2. Physical: admin-up, protocol-up, Rx light in spec, CRC/FCS trend, not a one-second blip.
  3. Logical: IP reachability to the PE, BFD, QoS drops. Capture 30 seconds if the fault is intermittent.
  4. Open the ISP ticket with circuit ID, timestamps in UTC, light levels, and a ping plot. Ask for an RFO clock.
  5. Verify restore: BFD up, error counters flat, overlay SLA recovered.
ckt: IAH-2401-MPLS-001  Rx -8.2 dBm  (spec -2 to -12)
  CRC 4.1e5 last 15m   BFD down 00:12:44Z
  PE 192.0.2.1 unreachable

Anti-patterns

  • Never bounce BGP to "see if it comes back" before the physical check.
  • Do not give the ISP a screenshot with no circuit ID.

Safety

Interface flaps are emergency-only and logged.

gesh75/claude-skill-lint/tree/main/skills/netops/wan-circuit-triage commit 3f2acbf9ea

Frequently asked questions

npx skillmds@latest add gesh75/wan-circuit-triage