Private Network For Failover Clustering

Posted on 2013-11-12
Last Modified: 2013-11-12
I need some help with Networking a Fail-over Cluster.  Our network is configured as all devices get a 192 address the cluster I want to create will have multiple network cards to prevent a single point of failure but what I am struggling with is the creation of a private network the cluster will not accept 2 NICS on the same subnet.  I wanted to use 172.16 network one NIC would be and the other  but I am confused on what the subnet mask and default gateway should be.  In regards to the DNS should I put the 192 DNS servers in or What I know this is a stupid question but any help would be appreciated
Question by:cameljoe121
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LVL 117
ID: 39642039
just create a subnet mask of for your private network, for the cluster heartbeat.

there is also no requirement for a gateway.... it's just a network, with two IP Addresses, that need to communicate with each other.

no need for any DNS settings, for your private network for heartbeat, also remove file and print services, just TCP/IP is required, and do not register IP with DNS.

Author Comment

ID: 39642117
I am not sure what I am doing wrong here I have 2 NICS in server 2012 one say ether net the other say HyperVSwitch I am changing the settings on the Hyper-V Switch once I do that It says I am not connected I want to have redundant paths for the fail-over cluster to communicated with each other and the shared storage besides the 192 network.
LVL 117
ID: 39642143
I would not change the Hyper-V switch one, as this will be used by Hyper-V and it's networking.

Author Comment

ID: 39642210
So Each of the two servers and the shared storage each have two NICS right now there will be two more for each of the server nodes can those be on the 172.16.X.X network as well or do they have to be different.  Also besides pinging the other address is there anyway in the network card details to see they are connected?
LVL 117
ID: 39642221
You only have two nics per server?
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Author Comment

ID: 39642242
at the moment this is just a test I am going to be installing 4 dual port gigbit I have everything pretty much figured out except this mutiple networks issue I am trying to wrap my head around it.  But when I get all the rest installed can they be on the 172.16.X.X?
LVL 117
ID: 39642465
Two nics, is rather limited, as ideally you will need

1 nic pair for Network VM Traffic

1 nic pair for Cluster Heartbeat (172.16.x.x/

1 nic pair for Shared Storage - iSCSI

1 nic pair for Live Migration

For test, I would using an existing network for Cluster Heart Beat.

Author Comment

ID: 39642534
That is what is was basically thinking.   The VM Network traffic will be on the network and the cluster heart beat will be on the 172.16.X.X but, the iscsi and the Live Migration what do they go on the 192 or the 172 or do they need to each be on their own as well?
LVL 117
ID: 39642591
It's recommended to keep Storage Traffic seperate from VM Network traffic, as well as Live Migration, it's recommended, not essential.

Author Comment

ID: 39642623
OK so VM is 192.168.100.X network, Live Migration is 172.16.X.X what would you recommend for storage? a Subnet of 172.16.X.X or a Network?
LVL 117

Accepted Solution

Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
ID: 39642635

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