On Wed, Jul 4, 2018 at 10:35 PM Andrew Lunn wrote:
>
> On Wed, Jul 04, 2018 at 08:33:24PM +0200, Linus Walleij wrote:
> > The hardware supposedly handles frames up to 10236 bytes and
> > implements .ndo_change_mtu() so accept 10236 minus the ethernet
> > header for a VLAN tagged frame on the netdevices. Use
> > ETH_MIN_MTU as minimum MTU.
> >
> > Signed-off-by: Linus Walleij
>
> Hi Linus
>
> Did you try with an MTU of 68? Maybe the vendor picked 256 because of
> a hardware limit?
Yeah works fine:
ping -s 68 169.254.1.2
PING 169.254.1.2 (169.254.1.2) 68(96) bytes of data.
76 bytes from 169.254.1.2: icmp_seq=1 ttl=64 time=0.359 ms
76 bytes from 169.254.1.2: icmp_seq=2 ttl=64 time=0.346 ms
76 bytes from 169.254.1.2: icmp_seq=3 ttl=64 time=0.351 ms
This also works fine:
ping -s 9000 169.254.1.2
PING 169.254.1.2 (169.254.1.2) 9000(9028) bytes of data.
9008 bytes from 169.254.1.2: icmp_seq=1 ttl=64 time=1.45 ms
9008 bytes from 169.254.1.2: icmp_seq=2 ttl=64 time=1.68 ms
9008 bytes from 169.254.1.2: icmp_seq=3 ttl=64 time=1.55 ms
I'll send new patches with all suggested changes soon :)
Thanks a lot for your help!
Yours,
Linus Walleij
