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Document configuring the arp cache for large clusters

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Signed-off-by: Jonathon Anderson <janderson@ciq.com>
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Jonathon Anderson
2026-03-11 23:22:07 -06:00
parent fe8f4b5b11
commit 3f12d5635c
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userdocs/server/routes.rst
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@@ -181,6 +181,12 @@ of the client's IP address against the kernel's ARP cache (``/proc/net/arp``).
This route is intended for EFI HTTP Boot clients, where the firmware fetches
a boot URI from DHCP and cannot perform variable substitution.
.. note::
On large clusters the kernel's default ARP cache limits may be exceeded,
causing node identification to fail. See
:ref:`arp-cache-overflow-on-large-clusters` for tuning guidance.
The ``{file}`` component determines what is served:
* ``shim.efi``: Serves the ``shim.efi`` binary extracted from the node's