Description of problem:

When a machine uses ipv6 for name resolution and after vdsm installation it is not possible to resolve names.

Here is my nic configuration before installation:

TYPE="Ethernet"
BOOTPROTO="dhcp"
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="eth0"
UUID="0079668a-8708-46ad-8dbf-da418ae6f77e"
DEVICE="eth0"
ONBOOT="yes"

here is after:

# Generated by VDSM version 4.20.23-1.el7.centos
DEVICE=eth0
BRIDGE=ovirtmgmt
ONBOOT=yes
MTU=1500
DEFROUTE=no
NM_CONTROLLED=no
IPV6INIT=no

and the bridge:
# Generated by VDSM version 4.20.23-1.el7.centos
DEVICE=ovirtmgmt
TYPE=Bridge
DELAY=0
STP=off
ONBOOT=yes
BOOTPROTO=dhcp
MTU=1500
DEFROUTE=yes
NM_CONTROLLED=no
IPV6INIT=yes
DHCPV6C=yes
IPV6_AUTOCONF=no

my resolv.conf

; generated by /usr/sbin/dhclient-script
nameserver 2001:730:3ed2::53
nameserver 2001:730:3ed2:1000::53
search localdomain

Version-Release number of selected component (if applicable):


How reproducible:

Steps to Reproduce:
1. Install new host on a vm configured like above

Actual results:
Occurs 100% with above network configuration

Expected results:
Name resolution still works

Additional info: