On Thu, 4 Jan 2018 20:51:30 +0100 (CET) "Carlos E. R." <robin.listas@telefonica.net> wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
On Thursday, 2018-01-04 at 17:05 +0100, Per Jessen wrote:
suse@a-domani.nl wrote:
Hi all,
I noticed that my ISP requires me to reduce my MTU to 1472. As my ethernet devices are used via bridge devices, I wonder if:
A) it is enough to lower the MTU on the physical ethernet device on my linux box.. B) also lower the MTU of the related bridge device C) also required to lower the MTU of the other (virtual) devices connected to this bridge?
It's enough to lower the MTU on the uplink device.
Yes, but that will cause a 1500 byte packet inside to be divided in two packets when going outside. More work for the router, and slowdown.
The 1472 figure rings a fuzzy bell with old modems. :-?
1472 is the maximum size ping packet that will fit inside a 1500 byte network packet, given the 20 byte IP header and 8 byte ICMP header (according to stackoverflow or https://support.aa.net.uk/MTU). 1492 for PPPoE, BTW -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org