Public bug reported:

After upgrading to artful a while ago, my system no longer respects
routes given out by my DHCP:

 tail -f /var/log/syslog | grep -i dhcp
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0380] 
dhcp4 (enx0123456789ab): activation: beginning transaction (timeout in 45 
seconds)
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0446] 
dhcp4 (enx0123456789ab): dhclient started with pid 23633
Aug  1 17:07:43 user-laptop dhclient[23633]: DHCPREQUEST of 10.2.0.5 on 
enx0123456789ab to 255.255.255.255 port 67 (xid=0x13152178)
Aug  1 17:07:43 user-laptop dhclient[23633]: DHCPACK of 10.2.0.5 from 10.2.0.1
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0805] 
dhcp4 (enx0123456789ab):   address 10.2.0.5
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0805] 
dhcp4 (enx0123456789ab):   plen 24 (255.255.255.0)
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0805] 
dhcp4 (enx0123456789ab):   classless static route 10.0.0.0/13 gw 10.2.0.1
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   gateway 10.2.0.253
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   lease time 86400
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   hostname 'user-laptop'
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   nameserver '10.2.0.1'
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   domain name 'user.domain'
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp (enx0123456789ab):   domain search 'user.domain.'
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp (enx0123456789ab):   domain search 'domain.'
Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab): state changed unknown -> bound
^C
 ip route
default via 10.2.0.253 dev enx0123456789ab proto static metric 100 
10.2.0.0/24 dev enx0123456789ab proto kernel scope link src 10.2.0.5 metric 102

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: network-manager 1.8.2-1ubuntu2
ProcVersionSignature: Ubuntu 4.11.0-10.15-generic 4.11.8
Uname: Linux 4.11.0-10-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.6-0ubuntu4
Architecture: amd64
CurrentDesktop: GNOME
Date: Tue Aug  1 17:08:24 2017
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2016-05-06 (451 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
NetworkManager.conf:
 [main]
 plugins=ifupdown,keyfile
 
 [ifupdown]
 managed=false
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=false
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to artful on 2017-07-19 (13 days ago)
modified.conffile..etc.polkit-1.localauthority.50-local.d.org.freedesktop.NetworkManager.pkla:
 [deleted]
nmcli-nm:
 RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  WIFI  
    WWAN-HW  WWAN    
 running  1.8.2    connected  started  full          enabled     enabled  
disabled  enabled  enabled

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful wayland-session

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https://bugs.launchpad.net/bugs/1707952

Title:
  Routes from DHCP not respected

Status in network-manager package in Ubuntu:
  New

Bug description:
  After upgrading to artful a while ago, my system no longer respects
  routes given out by my DHCP:

   tail -f /var/log/syslog | grep -i dhcp
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0380] 
dhcp4 (enx0123456789ab): activation: beginning transaction (timeout in 45 
seconds)
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0446] 
dhcp4 (enx0123456789ab): dhclient started with pid 23633
  Aug  1 17:07:43 user-laptop dhclient[23633]: DHCPREQUEST of 10.2.0.5 on 
enx0123456789ab to 255.255.255.255 port 67 (xid=0x13152178)
  Aug  1 17:07:43 user-laptop dhclient[23633]: DHCPACK of 10.2.0.5 from 10.2.0.1
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0805] 
dhcp4 (enx0123456789ab):   address 10.2.0.5
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0805] 
dhcp4 (enx0123456789ab):   plen 24 (255.255.255.0)
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0805] 
dhcp4 (enx0123456789ab):   classless static route 10.0.0.0/13 gw 10.2.0.1
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   gateway 10.2.0.253
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   lease time 86400
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   hostname 'user-laptop'
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   nameserver '10.2.0.1'
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab):   domain name 'user.domain'
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp (enx0123456789ab):   domain search 'user.domain.'
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp (enx0123456789ab):   domain search 'domain.'
  Aug  1 17:07:43 user-laptop NetworkManager[2627]: <info>  [1501600063.0806] 
dhcp4 (enx0123456789ab): state changed unknown -> bound
  ^C
   ip route
  default via 10.2.0.253 dev enx0123456789ab proto static metric 100 
  10.2.0.0/24 dev enx0123456789ab proto kernel scope link src 10.2.0.5 metric 
102

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: network-manager 1.8.2-1ubuntu2
  ProcVersionSignature: Ubuntu 4.11.0-10.15-generic 4.11.8
  Uname: Linux 4.11.0-10-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
  ApportVersion: 2.20.6-0ubuntu4
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Tue Aug  1 17:08:24 2017
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2016-05-06 (451 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
  NetworkManager.conf:
   [main]
   plugins=ifupdown,keyfile
   
   [ifupdown]
   managed=false
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=false
   WWANEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to artful on 2017-07-19 (13 days ago)
  
modified.conffile..etc.polkit-1.localauthority.50-local.d.org.freedesktop.NetworkManager.pkla:
 [deleted]
  nmcli-nm:
   RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  
WIFI      WWAN-HW  WWAN    
   running  1.8.2    connected  started  full          enabled     enabled  
disabled  enabled  enabled

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