On 2019-09-23 6:43 a.m., Carlo Pisani wrote: > I need 2000 MTU, 4000 MTU, 7000 MTU, or 9000 MTU > > can someone check the max MTU capability of the built-in lan on a C8000? My c8000 has an intel e1000: [ 21.140119] e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI The driver supports jumbo packets up to 0x3F00: dave@mx3210:~/linux/linux-stable/drivers/net/ethernet/intel/e1000$ grep MAX_JUMBO_FRAME_SIZE * e1000_hw.h:#define MAX_JUMBO_FRAME_SIZE 0x3F00 e1000_main.c: netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN); e1000_main.c: /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */ Dave -- John David Anglin dave.anglin@xxxxxxxx
