Redundant subnets are incorrectly created in an iSCSI IPv6 network

This article provides a solution to an issue where redundant subnets are incorrectly created in an iSCSI IPv6 network.

Applies to:   Windows Server 2019
Original KB number:   4536782

Symptoms

You design an iSCSI IPv6 network that contains servers and storage devices. In this network, some servers use link-local addresses.

In this situation, you encounter an issue in which multiple gateways try to create separate storage subnets to isolate the traffic. However, the subnets are redundant.

Workaround

To work around this issue, configure the initiator and the target on different subnets.

References

• iSCSI Boot Firmware Table (iBFT) as Defined in ACPI 3.0b Specification (download file)

• Storage Services Protocols Overview

• Windows Hardware Compatibility Program specifications and policies for the iSCSI industry and Microsoft

• IPv6 Link-local and Site-local Addresses