{"action":"closed","issue":{"url":"https://api.github.com/repos/docker/docker/issues/22028","repository_url":"https://api.github.com/repos/docker/docker","labels_url":"https://api.github.com/repos/docker/docker/issues/22028/labels{/name}","comments_url":"https://api.github.com/repos/docker/docker/issues/22028/comments","events_url":"https://api.github.com/repos/docker/docker/issues/22028/events","html_url":"https://github.com/docker/docker/issues/22028","id":148314341,"number":22028,"title":"docker 1.10, 1.11 do not infer MTU from eth0; docker 1.9 does","user":{"login":"sprohaska","id":217580,"avatar_url":"https://avatars.githubusercontent.com/u/217580?v=3","gravatar_id":"","url":"https://api.github.com/users/sprohaska","html_url":"https://github.com/sprohaska","followers_url":"https://api.github.com/users/sprohaska/followers","following_url":"https://api.github.com/users/sprohaska/following{/other_user}","gists_url":"https://api.github.com/users/sprohaska/gists{/gist_id}","starred_url":"https://api.github.com/users/sprohaska/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sprohaska/subscriptions","organizations_url":"https://api.github.com/users/sprohaska/orgs","repos_url":"https://api.github.com/users/sprohaska/repos","events_url":"https://api.github.com/users/sprohaska/events{/privacy}","received_events_url":"https://api.github.com/users/sprohaska/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/docker/docker/labels/group/networking","name":"group/networking","color":"F6FBFF"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":10,"created_at":"2016-04-14T10:13:44Z","updated_at":"2016-04-18T17:42:22Z","closed_at":"2016-04-18T17:42:22Z","body":"Docker 1.9 takes the MTU from eth0 and uses it for veth:\r\n\r\n```\r\n$ ip addr\r\neth0: ... mtu 1454, ...\r\nvethc4...: mtu 1454, ...\r\n```\r\n\r\nWith Docker 1.10 and 1.11, I need to explicitly pass `--mtu` to the daemon. Without it, docker uses `1500` for the `veth` and I observe network problems."}}