Thanks Stephen.

On Fri, Oct 18, 2024 at 10:13 PM Stephen Hemminger <
stephen@networkplumber.org> wrote:

> On Fri, 18 Oct 2024 22:05:24 +0530
> Rajasekhar Pulluru <pullururajasekhar@gmail.com> wrote:
>
> > Team,
> > Does setting mtu using rte_eth_dev_set_mtu limit the maximum size of the
> > packet received on the dpdk port to the configured mtu size?
> >
> > On an intel machine with ixgbe port, with mtu set to 1500, no rx-offloads
> > enabled, ixgbe dpdk port is able to receive packets greater than 1500
> size
> > and even jumbo frames of size 9000, even though the peer is sending them
> > fragmented with mtu of 1500.
> >
> > How do I restrict the port not to receive any frame greater than mtu
> size?
> >
> > Appreciate any help,
> > Thanks.
> > Rajasekhar
>
>
> In networking, MTU and MRU are overlapping concepts.
> The MTU value is used as a hint to the driver as to what size buffer to
> allocate
> but it can use larger if it wants. If you have restrictions, then the
> application
> needs to enforce them.
>