How to Avoid Third party system to use the internal card (for failover cluster use only) and use only the second extrnal (public) card?

דן קובי - DAN KOUBI 1 Reputation point

We have a scenario of two servers in the cluster failover with each one of them with two network cards one is used for cluster purpose only and the second card is for the main use of network traffic

but we encounter a usage of the third app (ERP system) of both of the card without any identification of the internal card and the external, our erp cant be configureed in what card to use
i was assuming as an Microsoft app will know to register the internal card as cluster only use and block from a third party in os level to use both of this cards

can anyone has a suggestion how to configured the use of internal card for failover use only and avoid any third party application to use the?

sorry for the lack of technical terms I am not a network guy and our network teams said there is no solution for this scenario

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Windows Server Clustering
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Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Clustering: The grouping of multiple servers in a way that allows them to appear to be a single unit to client computers on a network. Clustering is a means of increasing network capacity, providing live backup in case one of the servers fails, and improving data security.
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  1. Gary Reynolds 9,396 Reputation points


    I'm assuming you have or would like something like this, and all failover traffic is using the "back" network interface and all the ERP traffic is using the "front" interface.


    Yes it is possible to configure the network cards, to prevent the traffic for the ERP application using the 'back' failover interface. But it does require some additional configuration to do this.

    1. On the failover network cards under IP configuration, remove the option Register this connection's address in DNS, this prevent the failover IP address from being recorded against the server name in DNS and means the client machines will not use this IP address.
    2. Install the failover cluster role on each server
    3. Create a failover cluster
    4. Configure the cluster heartbeat configuration to use the failover IP address for heartbeat traffic
    5. Install the application and configure
    6. Make sure all clients are using the failover Cluster IP address when accessing the ERP application.

    Obviously this is a very high level explanation on how to configure the failover cluster, and may change based on our network configuration, and application requirements. Have a look at this article which contains details on how to configure failover clusters.

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