On Tue, 16 Jan 2018 at 16:23 James Page <james.p...@ubuntu.com> wrote:
> > On Tue, 16 Jan 2018 at 15:47 Eric Garver <e...@erig.me> wrote: > [...] > >> > Re-tested with the mainline kernel; gre_sys device is still configured >> with >> > a 1472 MTU, however I was then able to increase it using ip link set >> > gre_sys mtu XXXX, confirming that the kernel applied hardware limit was >> not >> > longer being enforced - however looks like the IFLA_MTU settings >> provided >> > from OVS are still being ignored by the kernel. >> >> What was the value of XXXX? Did you try 66535 (what OVS uses)? Any dmesg >> for the OVS case? >> > > Good question: > > # ip link set gre_sys mtu 65535 > RTNETLINK answers: Invalid argument > # ip link set gre_sys mtu 9000 > # ip link > [...] > 18: gre_sys@NONE: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc > pfifo_fast master ovs-system state UNKNOWN mode DEFAULT group default qlen > 1000 > link/ether ea:38:bd:61:29:4d brd ff:ff:ff:ff:ff:ff > > so the value set by OVS was not accepted using ip as well. > 65490 was the largest MTU value I am able to set via the ip command. > > > _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
