Ubuntu
linux package

  1. Zesty (17.04)
  2. Bug #1679823
  3. Comment #95

Comment 95 for bug 1679823

Revision history for this message
Dan Streetman (ddstreet) wrote :

> I have the same problem with my DELL server. Can't set MTU > 1500 with current kernel.

Your hardware is limited, you are not seeing a kernel bug. Your tg3 chip has a "jumbo capable" flag and it seems it not set - meaning your NIC does not support frames larger than the standard 1500.

/* hardware minimum and maximum for a single frame's data payload */
#define TG3_MIN_MTU ETH_ZLEN
#define TG3_MAX_MTU(tp) \
        (tg3_flag(tp, JUMBO_CAPABLE) ? 9000 : 1500)