From: Lukas Sismis <lukas.sismis@gmail.com>
Date: Sun, 11 Feb 2024 20:14:08 +0000 (+0100)
Subject: doc: mention the limited number of RX/TX descriptors on Intel NICs
X-Git-Tag: suricata-8.0.0-beta1~1760
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=356f9ffa130fbaaf82e7e28de98bdc24fe32f945;p=thirdparty%2Fsuricata.git

doc: mention the limited number of RX/TX descriptors on Intel NICs

Ticket: 6748
---

diff --git a/doc/userguide/configuration/suricata-yaml.rst b/doc/userguide/configuration/suricata-yaml.rst
index 920be73530..db9040aedc 100644
--- a/doc/userguide/configuration/suricata-yaml.rst
+++ b/doc/userguide/configuration/suricata-yaml.rst
@@ -2138,7 +2138,11 @@ size of the cache is covered in the YAML file.
 To be able to run DPDK on Intel cards, it is required to change the default
 Intel driver to either `vfio-pci` or `igb_uio` driver. The process is
 described in `DPDK manual page regarding Linux drivers
-<https://doc.dpdk.org/guides/linux_gsg/linux_drivers.html>`_.
+<https://doc.dpdk.org/guides/linux_gsg/linux_drivers.html>`_. 
+The Intel NICs have the amount of RX/TX descriptors capped at 4096.
+This should be possible to change by manually compiling the DPDK while
+changing the value of respective macros for the desired drivers
+(e.g. IXGBE_MAX_RING_DESC/I40E_MAX_RING_DESC).
 DPDK is natively supported by Mellanox and thus their NICs should work
 "out of the box".