From 1a48e014e2c3b3ae84d323096a74f4459848c352 Mon Sep 17 00:00:00 2001
From: Matt Layher <mdlayher@gmail.com>
Date: Tue, 22 Aug 2023 10:27:53 -0400
Subject: [PATCH] nixos/routnerr-3: Ethernet tuning

---
 nixos/routnerr-3/networking.nix | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/nixos/routnerr-3/networking.nix b/nixos/routnerr-3/networking.nix
index e336534..104d67a 100644
--- a/nixos/routnerr-3/networking.nix
+++ b/nixos/routnerr-3/networking.nix
@@ -10,7 +10,14 @@ let
         Type = "ether";
         MACAddress = mac;
       };
-      linkConfig.Name = name;
+      linkConfig = {
+        Name = name;
+
+        # Hardware tuning. Note that wan0/wan1/mgmt0 all happen to support a max
+        # of 4096 since the NixOS option won't allow "max".
+        RxBufferSize = 4096;
+        TxBufferSize = 4096;
+      };
     }));
 
   vlanNetdev = (name: