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 a Physical iSCSI Fault Domain
Create a physical 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 and SCv3000 series controllers.
Legacy mode is not supported.
Steps
1. If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.
2. Click the Storage tab.
3. In the Storage tab navigation pane, expand Fault Domains, then select iSCSI.
4. In the right pane, click Create Fault Domain. The Create Fault Domain dialog box opens.
5. In the Name field, type a name for the fault domain.
6. (Virtual port mode only) 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. (Optional) In the Target IPv6 Address field, type an IP address to assign to the iSCSI control port.
8. (Optional) If necessary, assign a VLAN ID to the fault domain.
NOTE:
If the Storage Center does not meet the multi-VLAN tagging requirements, a VLAN ID cannot be specified at
this time. Instead, modify the fault domain after it is created to add a VLAN ID.
a) Select the Physical option if you want to create a physical fault domain, that is, a fault domain that consists of physical ports.
b) Select the Virtual option if you want to create a fault domain that consists of virtual ports.
c) Select the VLAN Tagged check box if you want to create a tagged fault domain that consist of physical ports.
d) In the VLAN ID field, type a VLAN ID for the fault domain. Allowed values are 1–4096.
e) (Optional) To assign a priority level to the VLAN, type a value from 0–7 in the Class of Service Priority field. 0 is best effort, 1 is
the lowest priority, and 7 is the highest priority.
Storage Center Maintenance
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