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Serve DNS load balancing IPs on a non data network

[EDIT] Please use caution when setting up your environment according to this article. In some case, especially when using BIND DNS server with non-default parameters, you may end-up with requests going to data LIF even if they are on the storage network and you set « -listen-for-dns-query false » on it.

I got an interesting question from a customer about the way DNS load balancing is served in a cluster.

For network topology reasons, they needed to serve DNS requests on a network different from the data network used by the clients to access storage.

The problem is that Data ONTAP only listens to DNS requests on data LIFs that has been configured for DNS load balancing. The obvious issue is that if you configure an additional LIF on the management network, the load balancer will start serving this IP to the clients, which might not be the optimum path or even not routed at all.

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