docs(troubleshooting): diagnostic walkthrough for down fiber links#298
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Pull request overview
Adds a troubleshooting walkthrough to help operators diagnose physical (Layer 1) causes of down fiber links using kubectl fabric inspect, focusing on interpreting per-lane laser power patterns (notably for 800GBASE-DR8).
Changes:
- Documented a step-by-step workflow starting from LLDP/BGP neighbor failures to isolating a single problematic link/port.
- Added guidance on using
inspect switch --portsandinspect switch --lasersfor diagnosis. - Included interpretation patterns for per-lane optical power readings on 800G DR8.
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Adds a step-by-step procedure that takes a user from a kubectl fabric inspect lldp/bgp failure to a narrowed layer 1 root cause using only the inspect surface (--ports, --lasers), including interpretation of common per-lane optical power patterns on 800G DR8. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> Signed-off-by: Pau Capdevila <pau@githedgehog.com>
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Adds a step-by-step procedure that takes a user from a kubectl fabric inspect lldp/bgp failure to a narrowed layer 1 root cause using only the inspect surface (--ports, --lasers), including interpretation of common per-lane optical power patterns on 800G DR8.