On Mon, 29 Jan 2018 10:42:19 +0100 Seweryn Niemiec <ser@xxxxxxxxxxxxxxx> wrote: > On 28.01.2018 23:28, Stephen Hemminger wrote: > > These symptoms sound like an MTU mismatch. > > The padding is not related. More likely, the issue is that one side > > is sending a larger frame than the MTU of the underlying interface. > > Since the bridge is a pure layer 2 interface, it has not choice > > but to drop any frame where the size is greater than the MTU. > > I have a similar problem (same infrastructure and same symptoms) but with random > occurrence. Ssh session hangs randomly, usually before the login prompt is > shown), sometimes a bit later, sometimes after few days. I have MTU 1500 on all > interfaces taking part in communication. Ping of any size works and as far as I > tested, HTTP communication too, but there are problems with HTTPS. > If you see that, it usually is some middlebox in the way intefering with packets.
