** Changed in: network-manager (Ubuntu Bionic)
     Assignee: Olivier Tilloy (osomon) => Till Kamppeter (till-kamppeter)

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https://bugs.launchpad.net/bugs/1794478

Title:
  Automatic ipv4 not assigned to bond interface is manual ipv6 is
  assigned to it

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in network-manager package in Ubuntu:
  Fix Released
Status in network-manager source package in Bionic:
  Confirmed

Bug description:
  ---Problem Description---
  Bond interface with automatic ipv4 mode and manual ipv6 mode fails to get 
automatic ipv4 assigned from dhcp server.
   
  ---uname output---
  Linux NetworkTest 4.15.0-33-generic #36-Ubuntu SMP Wed Aug 15 13:42:17 UTC 
2018 s390x s390x s390x GNU/Linux
   
  Machine Type = s390x 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   When user configures ipv4 as automatic and ipv6 as manual for bond interface 
automatic ipv4 is not getting assigned.
  Looks like dhcp client request for ipv4 is not done to dhcp server after 
maunal ipv6 is assigned quickly to bond interface

  This issue will not happen in below cases:
  1)with ipv4 automatic and ipv6 manual configuration for ethernet or vlan 
interface.
  2)with ipv4 automatic and ipv6 automatic configuration for bond interface
  3)with ipv4 automatic and ipv6 disabled configuration for bond interface

  Configuration:
  Bond interface, ipv4 automatic mode and ipv6 automatic mode

  root@NetworkTest:/etc/NetworkManager/system-connections# cat test_bond 
  [connection]
  id=test_bond
  uuid=63e54542-5135-47ac-a954-b861c3937be2
  type=bond
  interface-name=test_bond
  permissions=
  timestamp=1537944121

  [ethernet]
  mac-address-blacklist=

  [bond]
  downdelay=0
  fail_over_mac=none
  miimon=100
  mode=active-backup
  num_grat_arp=0
  primary_reselect=always
  updelay=0

  [ipv4]
  dns-search=
  method=auto

  [ipv6]
  addr-gen-mode=stable-privacy
  dns-search=
  method=auto

  From /var/log/syslog, we can see ip got assigned:

  Sep 26 06:26:26 NetworkTest dhclient[8663]: DHCPDISCOVER on test_bond to 
255.255.255.255 port 67 interval 3 (xid=0x5e04bf1e)
  Sep 26 06:26:26 NetworkTest dhclient[8663]: DHCPREQUEST of 10.2.3.55 on 
test_bond to 255.255.255.255 port 67 (xid=0x5e04bf1e)
  Sep 26 06:26:26 NetworkTest dhclient[8663]: DHCPOFFER of 10.2.3.55 from 
10.2.3.1
  Sep 26 06:26:26 NetworkTest dhclient[8663]: DHCPACK of 10.2.3.55 from 10.2.3.1

  root@NetworkTest:/etc/NetworkManager/system-connections# ip a s test_bond
  28: test_bond: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc 
noqueue state UP group default qlen 1000
      link/ether 02:00:00:b3:b5:22 brd ff:ff:ff:ff:ff:ff
      inet 10.2.3.55/24 brd 10.2.3.255 scope global dynamic noprefixroute 
test_bond
         valid_lft 353sec preferred_lft 353sec
      inet6 fe80::ff:feb3:b522/64 scope link 
         valid_lft forever preferred_lft forever

  
  
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  Bond interface, ipv4 automatic mode and ipv6 manual mode

  root@NetworkTest:/etc/NetworkManager/system-connections# cat test_bond 
  [connection]
  id=test_bond
  uuid=3efb153a-a6e4-48fb-aa04-f0b8cb549bab
  type=bond
  interface-name=test_bond
  permissions=
  timestamp=1537943300

  [ethernet]
  mac-address-blacklist=

  [bond]
  downdelay=0
  fail_over_mac=none
  miimon=100
  mode=active-backup
  num_grat_arp=0
  primary_reselect=always
  updelay=0

  [ipv4]
  dns-search=
  method=auto

  [ipv6]
  addr-gen-mode=stable-privacy
  address1=fe81::32a5:bc5f:287f:8db8/64
  dns-search=
  method=manual

  No automatic ip assigned to ipv4 and no requests to dhcp server seen in 
/var/log/syslog
  root@NetworkTest:/etc/NetworkManager/system-connections# ip a s test_bond
  29: test_bond: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc 
noqueue state UP group default qlen 1000
      link/ether 02:00:00:b3:b5:22 brd ff:ff:ff:ff:ff:ff
      inet6 fe81::32a5:bc5f:287f:8db8/64 scope link noprefixroute 
         valid_lft forever preferred_lft forever

  
  ==> Correct LP-Package need to be assigned...!

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