--- zzzz-none-000/linux-4.9.279/drivers/net/ethernet/mellanox/mlxsw/switchx2.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/net/ethernet/mellanox/mlxsw/switchx2.c	2023-02-08 11:43:42.000000000 +0000
@@ -995,6 +995,9 @@
 	dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_LLTX | NETIF_F_SG |
 			 NETIF_F_VLAN_CHALLENGED;
 
+	dev->min_mtu = 0;
+	dev->max_mtu = ETH_MAX_MTU;
+
 	/* Each packet needs to have a Tx header (metadata) on top all other
 	 * headers.
 	 */