Looking at interfaces definition - it is still using acient interface names which are no longer in use. Has this installation been upgraded at all? The interface name today should be encf5f0 today.
Also: 4 ./sosreport-s8330025-20160224080320/etc/sysconfig/hardware/config-ccw-0.0.f5f0 0 ./sosreport-s8330025-20160224080320/etc/sysconfig/hardware/config-ccw-0.0.eb4a Are present, which means that this system is not upgraded to have latest sysconfig-hardware package. Your installation is really old, and thus is no longer supported, as common with development series only up to date systems are supported. Please upgrade your instance to latest packages, and try to reproduce the problem. With new udev rules managed by chzdev interface bring up should be more reliable. -- 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/1552788 Title: network lost after large number of reboots Status in Ubuntu on IBM z Systems: New Status in linux package in Ubuntu: Invalid Bug description: ---Problem Description--- network lost after large number of reboots (>500) Contact Information = pschm...@de.ibm.com ---uname output--- Linux s8330025 4.4.0-2-generic #16-Ubuntu SMP Thu Jan 28 15:44:18 UTC 2016 s390x s390x s390x GNU/Linux Machine Type = s390 z/VM Guest ---Steps to Reproduce--- reboot z/VM guest several times >500. After a large number of reboots the network interfaces doesn't come up any more. The z/VM guest boots fine, unless the missing network. Impossible to bring up network again manually. == Further debug shows that it is the "ip link set enccw0.0.f5f0 up" that is failing with "RTNETLINK answers: Operation not permitted". Looking for further debug assistance in determining why the CAP_NET_ADMIN check for the root user running ip might be failing. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1552788/+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
