On 2018-01-05 11:10, Per Jessen wrote:
suse@a-domani.nl wrote:
Reason for asking, is thatI used a SuSE box as a firewall. One leg to cable-modem (the one with the 1472 MTU) others to internal servers, clients or wifi-modem Besides that, on the machine itself I have some virtualized machines doing common tasks like dns
So all other (internal) interfaces (and bridges) I kept at the default MTU 1500 bytes, But one physical interface should be changed for certain, but I wonder if the corresponding virtual-bridge device should also lower its mtu
Your WAN interface is part of bridge? I am not sure, but I expect it should be sufficient to change the bridge MTU.
eth1 is connected to the cable modem; fw6:~ # ifconfig eth1 eth1 Link encap:Ethernet HWaddr 00:08:C7:E6:9A:3D inet6 addr: fe80::208:c7ff:fee6:9a3d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:8531668002 errors:0 dropped:0 overruns:1 frame:1 TX packets:4249592124 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:11815554011517 (11268190.3 Mb) TX bytes:416408316189 (397117.9 Mb) fw6:~ # fw6:~ # ifconfig br1 br1 Link encap:Ethernet HWaddr 00:08:C7:E6:9A:3D inet addr:172.16.11.1 Bcast:172.16.11.255 Mask:255.255.255.0 inet6 addr: 2001:xyz:1f01:3785:1::1/80 Scope:Global inet6 addr: fe80::208:c7ff:fee6:9a3d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:8498737383 errors:0 dropped:0 overruns:0 frame:0 TX packets:4249592140 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11695013314138 (11153233.8 Mb) TX bytes:416408323489 (397117.9 Mb) fw6:~ # brctl show br1 bridge name bridge id STP enabled interfaces br1 8000.0008c7e69a3d no eth1 Currently both eth1 AND br1 have a MTU of 1500 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org