The same behavior is observed on 14.04.1 LTS (latest updates), so this should be fixed there as well.
root@ubuntu14041:~# uname -a Linux ubuntu14041 3.13.0-35-generic #62-Ubuntu SMP Fri Aug 15 01:58:42 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Sample interfaces file content after multiple IP injections: # The loopback network interface auto lo iface lo inet loopback # The primary network interface # The following stanza(s) added by hv_set_ifconfig # The following stanza(s) added by hv_set_ifconfig # The following stanza(s) added by hv_set_ifconfig # The following stanza(s) added by hv_set_ifconfig # The following stanza(s) added by hv_set_ifconfig auto eth0 iface eth0 inet static -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1413020 Title: [Hyper-V] IP injection adds the line “# The following stanza(s) added by hv_set_ifconfig” for every pass. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1413020/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs