Release Notes

Dell™ Failover Clusters With

Microsoft

Windows Server

2008

Operating System

Important Information

Configuring IP Addresses for Dell Failover Clusters

with Direct-Attached iSCSI Storage Arrays

To successfully validate Dell Failover Cluster configurations based on

Direct-Attached Internet Small Computer System Interface (iSCSI) storage

arrays (for example: Dell MD3000i storage arrays, Dell|EMC AX-Series storage

arrays, or Dell|EMC CX-Series storage arrays), the Failover Cluster requires a

different subnet address for each host-to-storage iSCSI connection.

If the two IP addresses that are used for a host-to-storage iSCSI connection are

configured on the same IP subnet, and you run the Failover Cluster Validation

wizard, the Validate Network Communication Test fails.

Figure 1 is a good example of a Dell Failover Cluster configuration with four

different IPv4 subnets for the four NICs. If you run the Validate Network

Communication Test on this cluster configuration, the test is successful.

April 2008

MDiSCSI.fm Page 9 Monday, April 21, 2008 2:17 PM

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MDiSCSI.
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MDiSCSI.fm Page 10 Monday, April 21, 2008 2:17 PM Figure 1. Example of a Dell Failover Cluster Configuration with Four IPv4 Subnets for Four NICs NIC 1-1 IP Address: 192.168.130.10/24 NIC 2-1 IP Address: 192.168.132.10/24 NIC 1-2 IP Address: 192.168.131.10/24 NIC 2-2 IP Address: 192.168.133.10/24 Cluster Node 1 Cluster Node 2 iSCSI Storage Figure 2 is an example of a misconfigured Dell Failover Cluster configuration; it has two IPv4 subnets for the four NICs instead of four separate subnets.
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MDiSCSI.fm Page 11 Monday, April 21, 2008 2:17 PM If you run the Validate Network Communication Test on the Failover Cluster in Figure 2, the test fails and the following message is displayed: Network interfaces and are on the same cluster network, yet either address
is not reachable from address
or the ping latency is greater than the maximum allowed 500 milliseconds.
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MDiSCSI.fm Page 12 Monday, April 21, 2008 2:17 PM Configuring Volume Mount Point in Dell Failover Clusters Running Windows Server 2008 Operating System To configure a volume mount point in a Dell Failover Cluster running Windows Server 2008 operating system: 1 Initialize the logical disk created for configuring the volume mount point. 2 Add the logical disk you initialized in step 1 to the Available Storage pool in the cluster: a Open the Failover Cluster Management Console.