On 01/04/2018 10:54 AM, 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?
I assume you have a router/firewall between the ISP and your network. If so, you just change the WAN interface MTU to 1472 (that's an unusual size). Anything behind the firewall can continue to use 1500, if you wish, though there's no harm in reducing the MTU there as well. You can often do that with DHCP. Regardless, 1500 on the local network is not a problem, as IPv4 can use Path MTU Discovery or fragmentation to deal with the smaller MTU. IPv6 uses PMTUD only. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org