{"action":"created","issue":{"url":"https://api.github.com/repos/docker/docker/issues/18929","labels_url":"https://api.github.com/repos/docker/docker/issues/18929/labels{/name}","comments_url":"https://api.github.com/repos/docker/docker/issues/18929/comments","events_url":"https://api.github.com/repos/docker/docker/issues/18929/events","html_url":"https://github.com/docker/docker/issues/18929","id":124021784,"number":18929,"title":"Default vxlan udp port","user":{"login":"chenchun","id":985861,"avatar_url":"https://avatars.githubusercontent.com/u/985861?v=3","gravatar_id":"","url":"https://api.github.com/users/chenchun","html_url":"https://github.com/chenchun","followers_url":"https://api.github.com/users/chenchun/followers","following_url":"https://api.github.com/users/chenchun/following{/other_user}","gists_url":"https://api.github.com/users/chenchun/gists{/gist_id}","starred_url":"https://api.github.com/users/chenchun/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/chenchun/subscriptions","organizations_url":"https://api.github.com/users/chenchun/orgs","repos_url":"https://api.github.com/users/chenchun/repos","events_url":"https://api.github.com/users/chenchun/events{/privacy}","received_events_url":"https://api.github.com/users/chenchun/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":5,"created_at":"2015-12-28T05:44:03Z","updated_at":"2015-12-30T06:49:50Z","closed_at":"2015-12-30T06:49:50Z","body":"I tested overlay network on kernel 3.10. It didn't work at first. I found vxlan device listens on 8472 udp port instead of 4789. So I changed vxlan module to use 4789 udp port and it worked.\r\n\r\n```\r\n# cat /etc/modprobe.d/vxlan.conf\r\n \r\n#### Set the VXLAN UDP port ####\r\noptions vxlan udp_port=4789\r\n\r\n# rmmod vxlan\r\n# modprobe -v vxlan\r\n```\r\n\r\nHowever it seems to work fine on ubuntu kylin 14.10 without the above configuration.\r\nIf this is a old kernel version problem, we'd better add some documents talking about this.\r\nping @mrjana @mavenugo  "},"comment":{"url":"https://api.github.com/repos/docker/docker/issues/comments/167946563","html_url":"https://github.com/docker/docker/issues/18929#issuecomment-167946563","issue_url":"https://api.github.com/repos/docker/docker/issues/18929","id":167946563,"user":{"login":"chenchun","id":985861,"avatar_url":"https://avatars.githubusercontent.com/u/985861?v=3","gravatar_id":"","url":"https://api.github.com/users/chenchun","html_url":"https://github.com/chenchun","followers_url":"https://api.github.com/users/chenchun/followers","following_url":"https://api.github.com/users/chenchun/following{/other_user}","gists_url":"https://api.github.com/users/chenchun/gists{/gist_id}","starred_url":"https://api.github.com/users/chenchun/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/chenchun/subscriptions","organizations_url":"https://api.github.com/users/chenchun/orgs","repos_url":"https://api.github.com/users/chenchun/repos","events_url":"https://api.github.com/users/chenchun/events{/privacy}","received_events_url":"https://api.github.com/users/chenchun/received_events","type":"User","site_admin":false},"created_at":"2015-12-30T06:49:50Z","updated_at":"2015-12-30T06:49:50Z","body":"Yes, I just tried Centos7 with kernel 3.10.0-229.el7.x86_64 and confirmed it listens on 4789. Maybe this is because vxlan related code of my kernel have been modified. Still waiting for answers from the kernel team. I should have confirmed with them before open this issue. Sorry for the noisy."}}