--- zzzz-none-000/linux-4.9.279/include/uapi/linux/if_ether.h	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/include/uapi/linux/if_ether.h	2023-02-08 11:43:43.000000000 +0000
@@ -36,6 +36,9 @@
 #define ETH_FRAME_LEN	1514		/* Max. octets in frame sans FCS */
 #define ETH_FCS_LEN	4		/* Octets in the FCS		 */
 
+#define ETH_MIN_MTU    68              /* Min IPv4 MTU per RFC791      */
+#define ETH_MAX_MTU    0xFFFFU         /* 65535, same as IP_MAX_MTU    */
+
 /*
  *	These are the defined Ethernet Protocol ID's.
  */