Comment 0 for bug 1794478

---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...!