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spinifex/docs/compute
Ben Duncan 261b695e53 docs: document disabling overlay IPsec for trusted fabrics
The VPC networking guide had no mention of IPsec, so an operator reading it
had no way to discover that the geneve overlay is encrypted by default or
what turning that off is worth. Add a section covering the default-on
posture, the topologies where disabling is and is not appropriate, the
measured cost on the ConnectX-5 reference cluster, and the full procedure.

Correct the performance-tuning guide's claim that a manual
"ovn-nbctl set NB_Global . ipsec=false" is transient because the daemon
reconciles it. That holds for the enable direction only: ReconcileOVNIPSec
returns early when IPsec is disabled, so it stops requesting encryption but
never clears NB_Global.ipsec or other_config:ipsec_encapsulation. Both are
left reading true, which makes the control plane disagree with the config.
Document the manual steps as a required complement to the config change.
2026-10-14 08:09:51 +10:00
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