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You’ll need to configure on the storage array the Zone Type you selected. This allows you to zone each switch, and keep traffic in the zone avoiding use of the interlink which would cause additional hops and latency. Your storage investment made today will support you well. Radically simple to deploy and use, the arrays are cloud-ready providing data mobility to the cloud through HPE Cloud Volumes. You can choose to either bisect the subnet, or use a method of dedicating even numbered IPs to one switch/zone, and dedicating odd numbered IPs to the other switch/zone. The flash-enhanced architecture is combined with HPE InfoSight predictive analytics for fast, reliable access to data and 99.9999 guaranteed availability 1. Please see below for a table from HPE Alletra documentation: HPE IP Address Zone Types for ISL Configuration

To implement this, you’ll need to assign an IP Zone to each of your switches. You must have the NCM or SCM plugin installed on your ESXi hosts to be able to use IP Address Zones, and use the HPE Nimble Storage path selection policy (NIMBLE_PSP_DIRECTED). Using NCM (Nimble Connection Manager) and SCM (Storage Connection Manager) on your VMware ESXi hosts, the HPE Nimble and HPE Alletra storage solution can intelligently choose when to use the interlink depending on paths available, and the current health of SAN connectivity. However, in the event of a switch, NIC, and/or path failure, we do want to have the interlink available to facilitate data access and be available when required. When you have SAN switches that include an ISL (inter-switch link) that are connected to an HPE Nimble or HPE Alletra SAN, it’s preferred not to have traffic go across that interlink, as it creates additional hops for packets, as well as increases latency.

He then researched it, and confirmed we should have it enabled and configured. I actually had to advise the technician that numerous HPE technical documents recommended to enable and configure it when you have an ISL. Even though the customer purchased HPE Technical Installation and Startup Services, the HPE installer was not aware of IP Address Zoning and it’s purpose, advising us to disable it. I recently had a customer that purchased and deployed two HPE Alletra 6010 SANs for their VMware environment, where I was contracted to implement these SANs.