Administrator Guide

Types of iSCSI Fault Domains

When a Storage Center meets the multi-VLAN tagging requirements, two types of iSCSI fault domains can be created.

• Physical – The first fault domain configured for a given set of iSCSI ports.

– Physical fault domains do not require a VLAN ID, but can be configured to use a VLAN ID.

– Physical fault domains support iSCSI replication to and from remote Storage Centers.

• Virtual – Subsequent VLAN fault domains configured for the same set of iSCSI ports are referred to as virtual fault domains.

– Virtual fault domains must be assigned a VLAN ID.

– Virtual fault domains do not support iSCSI replication.

– Virtual fault domains do not support IPv6.

Creating iSCSI Fault Domains

Create an iSCSI fault domain to group ports that can fail over to each other because they have connectivity to the same resources.

NOTE: For user interface reference information, click Help.

Create an iSCSI Fault Domain

Create an iSCSI fault domain to group physical ports for failover purposes.

Prerequisites

• In virtual port mode, all iSCSI ports that are connected to the same iSCSI network should be added to the same fault domain.

• In legacy mode, each pair of primary and reserved ports that are connected to the same iSCSI network should be added to a

unique fault domain. The primary port should be located on a different controller than the secondary port.

• Physical ports cannot be selected and added to a fault domain if they are already added to another fault domain.

• Each iSCSI port that you want to add to the fault domain must be assigned an IP address, subnet mask, and gateway in the

same network as the iSCSI control port for the fault domain.

About this task

NOTE: iSCSI ports must be configured in virtual port mode when using SCv2000 series controllers. Legacy mode is not

supported.

Steps

1. Expand the Dell Storage Manager menu, and then click Storage.

2. In the SC Series tab, select a Storage Center to open the Storage Center view.

3. Click the Storage tab, and then click the Fault Domains subtab.

4. In the Fault Domains subtab, click New → iSCSI Fault Domain. The Create iSCSI Fault Domain dialog box opens.

5. In the Name field, type a name for the fault domain.

6. Configure an IP address and gateway for the iSCSI control port in the fault domain. Servers target this IP address using iSCSI

initiators, and the Storage Center redirects individual iSCSI connections to the appropriate virtual port.

a. In the Target IPv4 Address field, type an IP address to assign to the iSCSI control port.

b. In the Subnet Mask field, type the subnet mask for the well-known IP address.

c. In the Gateway IPv4 Address field, type the IP address for the iSCSI network default gateway.

7. In the Ports table, select the iSCSI ports to add to the fault domain. All iSCSI ports in the fault domain should be connected to

the same Ethernet network.

If creating a physical fault domain, physical ports appear in the list only if they are not assigned to any fault domain yet.

8. Click OK.