I built Xenial, Zesty, Artful and Bionic test kernels, all with a cherry pick of commit bbfcd77631573ac4a9f57eb6169e04256a111bc1. The test kernels can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1738219/ Can you give these test kernels a try and see if they resolve this bug? Thanks in advance! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1738219 Title: the kernel is blackholing IPv6 packets to linkdown nexthops Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: In Progress Status in linux source package in Zesty: In Progress Status in linux source package in Artful: In Progress Status in linux source package in Bionic: In Progress Bug description: When the 'ignore_routes_with_linkdown' sysctl is set, we should not consider linkdown nexthops during route lookup. While the code correctly verifies that the initially selected route ('match') has a carrier, it does not perform the same check in the subsequent multipath selection, resulting in a potential packet loss. In case the chosen route does not have a carrier and the sysctl is set, choose the initially selected route. Fixed in the upstream kernel with patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bbfcd77631573ac4a9f57eb6169e04256a111bc1 I think this patch must be backported to stable kernel in Xenial. I tested in patching the Ubuntu Xenial 4.4.0-21-generic and it works for me. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738219/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
