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Windows 2012 R2 - DNS BPA Results - DNS Servers on Ethernet should include the loopback address, but not as the first entry.

Single Server 2012 R2 network w/40 Win7 PC's. All "appears to function just fine but continually getting DNS - BPA reports "DNS Servers on Ethernet should include the loopback address, but not as the first entry".

NIC is configured:
Preferred DNS Server: 192.168.16.4
Alternate DNS Server: 127.0.0.1

I've tried different combinations of these addresses. Should I have our ISP's DNS server settings as primary?

I confess I'm no DNS expert, nor do I know anything about actively managing an IPv6 network. I can find my way around IPv4 and basic DNS functions just fine.

Connection has “Microsoft Network Adaptor Multiplexor Protocol” unchecked. Unsure if this is a default setting or if done as part of earlier diagnostics. Will follow best practices.

Unsure if it is related but all workstations on the network are Windows7 Pro. Most of them show a yellow exclamation mark on the network icon in the task bar and “no Internet” although the Internet connection is just fine. I disable IPv6 momentarily and the exclamation mark goes away. I reenable IPv6 and the exclamation mark stays gone until the next reboot.

Any assistance appreciated.

SOLUTION

David Johnson, CD

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Gandalf Grey

ASKER

Funny you mention root hints David, I re-ran the BPA and had 3 come back as not responding. I compared the list of those in DNS to an updated list on the web and found those same 3 outdated (so I updated them). I've not actively set up anything for IPv6 including DHCP. Any advice appreciated.

Mal Osborne

Can you paste here the output from:
IPCONFIG /ALL

Gandalf Grey

ASKER

Here is the output from IPConfig /all as requested:

Windows IP Configuration

Host Name . . . . . . . . . . . . : SERVER1
Primary Dns Suffix . . . . . . . : domain.local
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : domain.local

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Hyper-V Network Adapter
Physical Address. . . . . . . . . : 00-15-5D-10-03-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::10e0:3252:2052:c9f1%12(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.16.4(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : fe80::1ab1:69ff:fe51:d710%12
192.168.16.1
DHCPv6 IAID . . . . . . . . . . . : 301995357
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-20-98-3A-9B-00-15-5D-10-03-01
DNS Servers . . . . . . . . . . . : ::1
192.168.16.4
127.0.0.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{915E7445-9B64-4D6A-81F0-766F30833A50}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Mal Osborne

::1 is the IPv6 loopback, similar to 127.0.0.1 for IPv6. This is probably the loopback being referred to. Try removing it.

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footech

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Gandalf Grey

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Thanks Footech - I was really beginning to wonder, esp given all the differing opinions floating around the net about this. Really starting to wonder if I just substitute my ISP DNS for the primary (since isn't this setting just for the "client" side of the server?). Similarly wondering if IPv6 settings necessary much like Mal is suggesting with removing the IPv6 loopback?

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Mal Osborne

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footech

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Gandalf Grey

ASKER

Thanks guys!