Re: [net-next PATCH 1/2] net: ravb: Fix maximum MTU for GbEth devices

[Jakub Kicinski]

On Sat, 15 Jun 2024 11:30:37 +0100 Paul Barker wrote:
> The datasheets for all SoCs using the GbEth IP specify a maximum
> transmission frame size of 1.5 kByte. I've confirmed through internal
> discussions that support for 1522 byte frames has been validated, which
> allows us to support the default MTU of 1500 bytes after reserving space
> for the Ethernet header, frame checksums and an optional VLAN tag.


But what's the user impact? If we send a bigger frame the IP will hang?
Drop the packet? Something else?
"Validated" can also mean "officially supported" sometimes vendors just
say that to narrow down the test matrix :(