Re: [systemd-devel] [networkd] Unable to set MTU with .link file
On 06/08/2017 11:03 PM, Ian Pilcher wrote: I am tearing my hair out trying to figure out why I an unable to set the MTU of an OVS port with a .link file. Replying to myself for posterity ... As so often seems to be the case, my difficulties were due to that recurring issue, "You're doing it wrong." TL;DR - Setting different MTUs on different ports of an OVS bridge doesn't work as expected, so using separate tagged ports on the host OS isn't the way to go. Instead, create VLAN netdevs on top of the trunked OVS port (treating it as if it were a physical interface or bond). For example: 98-ovs0.link: [Match] OriginalName=ovs0 [Link] MTUBytes=8996 ovs0.network: [Match] Name=ovs0 [Network] VLAN=ovs0.248 VLAN=ovs0.250 ovs0.248.netdev: [NetDev] Name=ovs0.248 Kind=vlan [VLAN] Id=248 ovs0.250.netdev: [NetDev] Name=ovs0.250 Kind=vlan MTUBytes=1500 [VLAN] Id=250 -- Ian Pilcher arequip...@gmail.com "I grew up before Mark Zuckerberg invented friendship" ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] [networkd] Unable to set MTU with .link file
I am tearing my hair out trying to figure out why I an unable to set the MTU of an OVS port with a .link file. I am trying to create this: ++ ++ || || | eno1 | | eno2 | | (MTU = 8996) | | (MTU = 8996) | || || +---++ +---++ | | +---+---+ | +---++ || | bond0 | | (MTU = 8996) | || +---++ | +---++ || | ovs0 | | (MTU = 8996) | || +---++ | +---+---+ | | +---++ +---++ || || | vlan248| | vlan250| | (MTU = 8996) | | (MTU = 1500) | || || ++ ++ Everything works, except that vlan250 is inheriting the jumbo MTU from ovs0. I've created a link file to set the MTU to 1500: /etc/systemd/network/98-vlan250.link: [Match] OriginalName=vlan250 [Link] MTUBytes=1500 For some reason, this isn't working. I've set udev_log="debug" in /etc/udev/udev.conf and rebuilt my initramfs. I've also created a drop-in for systemd-networkd that sets SYSTEMD_LOG_LEVEL=debug. A full boot log with these settings can be found at: http://www.penurio.us/journal.txt Any ideas or debugging techniques very much appreciated. -- Ian Pilcher arequip...@gmail.com "I grew up before Mark Zuckerberg invented friendship" ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] [networkd] Unable to set MTU with .link file
I am tearing my hair out trying to figure out why I an unable to set the MTU of an OVS port with a .link file. I am trying to create this: ++ ++ || || | eno1 | | eno2 | | (MTU = 8996) | | (MTU = 8996) | || || +---++ +---++ | | +---+---+ | +---++ || | bond0 | | (MTU = 8996) | || +---++ | +---++ || | ovs0 | | (MTU = 8996) | || +---++ | +---+---+ | | +---++ +---++ || || | vlan248| | vlan250| | (MTU = 8996) | | (MTU = 1500) | || || ++ ++ Everything works, except that vlan250 is inheriting the jumbo MTU from ovs0. I've created a link file to set the MTU to 1500: /etc/systemd/network/98-vlan250.link: [Match] OriginalName=vlan250 [Link] MTUBytes=1500 For some reason, this isn't working. I've set udev_log="debug" in /etc/udev/udev.conf and rebuilt my initramfs. I've also created a drop-in for systemd-networkd that sets SYSTEMD_LOG_LEVEL=debug. A full boot log with these settings can be found at: http://www.penurio.us/journal.txt Any ideas or debugging techniques very much appreciated. -- Ian Pilcher arequip...@gmail.com "I grew up before Mark Zuckerberg invented friendship" ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
