{"action":"created","issue":{"url":"https://api.github.com/repos/coreos/bugs/issues/913","labels_url":"https://api.github.com/repos/coreos/bugs/issues/913/labels{/name}","comments_url":"https://api.github.com/repos/coreos/bugs/issues/913/comments","events_url":"https://api.github.com/repos/coreos/bugs/issues/913/events","html_url":"https://github.com/coreos/bugs/issues/913","id":110726270,"number":913,"title":"systemd-networkd does not change mtu","user":{"login":"lleszczu","id":12996461,"avatar_url":"https://avatars.githubusercontent.com/u/12996461?v=3","gravatar_id":"","url":"https://api.github.com/users/lleszczu","html_url":"https://github.com/lleszczu","followers_url":"https://api.github.com/users/lleszczu/followers","following_url":"https://api.github.com/users/lleszczu/following{/other_user}","gists_url":"https://api.github.com/users/lleszczu/gists{/gist_id}","starred_url":"https://api.github.com/users/lleszczu/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lleszczu/subscriptions","organizations_url":"https://api.github.com/users/lleszczu/orgs","repos_url":"https://api.github.com/users/lleszczu/repos","events_url":"https://api.github.com/users/lleszczu/events{/privacy}","received_events_url":"https://api.github.com/users/lleszczu/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/coreos/bugs/labels/component/networkd","name":"component/networkd","color":"0052cc"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-10-09T19:56:50Z","updated_at":"2015-10-09T20:14:10Z","closed_at":null,"body":"According to https://coreos.com/blog/intro-to-systemd-networkd/ I need a .link file to change interface MTU, it does not work though. I did try to go through logs with journalctl but without any luck ( no entries related to .link files ).\r\nThat's the entry from my cloud config\r\n```\r\n  - name: eno1.link\r\n    runtime: true\r\n    content: |\r\n      [Match]\r\n      MACAddress=ec:f4:bb:d9:1e:68\r\n      [Link]\r\n      MTUBytes=8950\r\n\r\n```\r\n\r\nThere is workaround: add custom udev rule and place it in /etc/udev/rules.d/10-net.rules\r\n```\r\nACTION==\"add\", SUBSYSTEM==\"net\", KERNEL==\"eno1\", ATTR{mtu}=\"8950\"\r\n\r\n```\r\nAfter that restart udev:\r\n```\r\nsystemctl restart systemd-udev-trigger.service\r\n```\r\n"},"comment":{"url":"https://api.github.com/repos/coreos/bugs/issues/comments/146976244","html_url":"https://github.com/coreos/bugs/issues/913#issuecomment-146976244","issue_url":"https://api.github.com/repos/coreos/bugs/issues/913","id":146976244,"user":{"login":"marineam","id":153640,"avatar_url":"https://avatars.githubusercontent.com/u/153640?v=3","gravatar_id":"","url":"https://api.github.com/users/marineam","html_url":"https://github.com/marineam","followers_url":"https://api.github.com/users/marineam/followers","following_url":"https://api.github.com/users/marineam/following{/other_user}","gists_url":"https://api.github.com/users/marineam/gists{/gist_id}","starred_url":"https://api.github.com/users/marineam/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/marineam/subscriptions","organizations_url":"https://api.github.com/users/marineam/orgs","repos_url":"https://api.github.com/users/marineam/repos","events_url":"https://api.github.com/users/marineam/events{/privacy}","received_events_url":"https://api.github.com/users/marineam/received_events","type":"User","site_admin":false},"created_at":"2015-10-09T20:14:10Z","updated_at":"2015-10-09T20:14:10Z","body":"That doc goes to great lengths to never specify a file name for the example config, we should change that so users have a more explicit pattern to follow.\r\n\r\n/cc @robszumski "}}