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v1.11: docs: Document upgrade impact for IPsec #24974

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9 changes: 9 additions & 0 deletions Documentation/operations/upgrade.rst
Original file line number Diff line number Diff line change
Expand Up @@ -316,6 +316,15 @@ Annotations:
behavior for a patch release, particularly given that version 1.11 has been in
use for a considerable period and is expected to be stable.

1.11.16+ Upgrade Notes
----------------------

* When upgrading from Cilium v1.10 or <v1.11.15 to Cilium >=v1.11.16 with
IPsec enabled, packet drops may occur during the upgrade. These drops are
expected to stop as soon as the Cilium agent is ready. IPsec error counters
``XfrmInNoStates`` and ``XfrmOutPolBlock`` may increase as a result of these
drops.

1.11.15 Upgrade Notes
---------------------

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