> I have the same problem with my DELL server. Can't set MTU > 1500 with
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)
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bond0: Invalid MTU 9000 requested, hw max 1500 with kernel 4.8 / 4.10
in XENIAL LTS
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