Comment 13 for bug 1466790

Comparing to output of a vivid VM, the sysctl status differs in one important detail. The initial dhclient again is gone but under the system-ifup.slice there is the new pid...

● <email address hidden> - ifup for eth0
   Loaded: loaded (/lib/systemd/system/ifup@.service; static; vendor preset: enabled)
   Active: active (exited) since Tue 2015-06-30 15:08:44 CEST; 20s ago
  Process: 403 ExecStart=/bin/sh -ec ifup --allow=hotplug %I; ifup --allow=auto %I; if ifquery %I >/dev/null; then ifquery --state %I >/dev/null; fi (code=exited, status=0/SUCCESS)
 Main PID: 403 (code=exited, status=0/SUCCESS)
   CGroup: /<email address hidden>
           └─736 dhclient -1 -v -pf /run/dhclient.eth0.pid -lf /var/lib/dhcp/...

Jun 30 15:08:45 lam-vivid6401 sh[403]: Sending on Socket/fallback
Jun 30 15:08:45 lam-vivid6401 sh[403]: DHCPDISCOVER on eth0 to 255.255.255....7)
Jun 30 15:08:46 lam-vivid6401 dhclient[430]: DHCPREQUEST of 192.168.2.159 on...)
Jun 30 15:08:46 lam-vivid6401 dhclient[430]: DHCPOFFER of 192.168.2.159 from...1
Jun 30 15:08:46 lam-vivid6401 sh[403]: DHCPREQUEST of 192.168.2.159 on eth0...7)
Jun 30 15:08:46 lam-vivid6401 sh[403]: DHCPOFFER of 192.168.2.159 from 192.....1
Jun 30 15:08:47 lam-vivid6401 dhclient[430]: DHCPACK of 192.168.2.159 from 1...1
Jun 30 15:08:47 lam-vivid6401 sh[403]: DHCPACK of 192.168.2.159 from 192.168.2.1
Jun 30 15:08:47 lam-vivid6401 dhclient[430]: bound to 192.168.2.159 -- renew....
Jun 30 15:08:47 lam-vivid6401 sh[403]: bound to 192.168.2.159 -- renewal in...s.
Hint: Some lines were ellipsized, use -l to show in full.
ubuntu@lam-vivid6401:~$ cat /run/dhclient.eth0.pid
736