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Windows Server 2012 Clustering error

im running windows 2012r2 Windows Fail Over Cluster.

I found there is 3rd nic virtual adapter when i performed ipconfig /all

the adapter mentioned as Microsoft Failover Cluster Virtual Adapter as per below both cluster node.

How to fix this as my cluster resources keep crashing and these ip in vistual adapter able to resolve my cluster node fqdn

Node 1:

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Failover Cluster Virtual Adapte
r
Physical Address. . . . . . . . . : 02-61-8C-9B-05-5A
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::290e:f4e3:46d5:fce2%26(Preferred)
IPv4 Address. . . . . . . . . . . : 169.254.1.23(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 755114330
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-8C-03-3E-00-21-5A-9B-05-5E

DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Node 2

Ethernet adapter Local Area Connection3:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Failover Cluster Virtual Adapte
r
Physical Address. . . . . . . . . : 02-61-8C-9B-03-52
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d059:5d25:5404:7865%26(Preferred)
IPv4 Address. . . . . . . . . . . : 169.254.1.99(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 839000410
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-15-81-AF-12-44-1E-A1-72-39-D5

DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Paul MacDonald

Those virtual adapters are created by Microsoft Clustering, and they're given APIPA addresses. I don't think they can be deleted. Why do you think they're causing problems?

Michael Pfister

Its been a while that I had to do with Windows clusters, but the NIC is used for the cluster heartbeat between the nodes. And yes, it has an IP configuration (APIPA address). I usually give it static private addresses far away from my internal networks.

I don't understand the meaning of
"these ip in vistual adapter able to resolve my cluster node fqdn"

For troubleshooting check the WIndows event log for warnings/errors.

zalazar

Is this a SQL cluster ?
And is the "Microsoft Failover Cluster Virtual Adapter" currently the first adapter listed when doing an "ipconfig /all"
If so then you could move it lower in the binding order.

First you need to open a command prompt (cmd.exe) as administrator and execute:

wmic nicconfig get Description,SettingID

Open in new window

Then start regedit and go to and open this entry: HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Linkage\Bind
You can then move the GUID of your other 2 normal NICs above the Cluster Virtual Adapter GUID.
And after this reboot the server.

Doodad Boy

ASKER

Hi Team,

Yes this Ms cluster is used for SQL Cluster.

As per Ms article - https://docs.microsoft.com/en-us/archive/blogs/askcore/what-is-a-microsoft-failover-cluster-virtual-adapter-anyway

The MAC address that is assigned to the Microsoft Failover Cluster Virtual Adapter is based on the MAC address of one of the physical NICs

But in my case, the Microsoft Failover Cluster Virtual Adapter MAC address not following my assigned VM Nic card mac address which has been assigned to the cluster node.

Originally the existing vm cluster node was build via P2V process.

I not sure the virtual adapter display MAC address are from old physical server

ASKER CERTIFIED SOLUTION

zalazar

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Michael Pfister

Unless there is no duplicate MAC address there is no need to change it