Administrator Guide

Delete an iSCSI Fault Domain
Delete an iSCSI fault domain if all ports have been removed and it is no longer needed.
About this task
● If the front-end ports were configured for virtual port mode, the storage system must be running Storage Center 7.5.1 or
later to remove a fault domain.
● If the front-end ports were configured for legacy mode, a fault domain can be removed from a storage system running any
supported version Storage Center.
NOTE: You cannot delete fault domains on SCv2000 Series or SCv3000 Series storage systems.
Steps
1. If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of
Unisphere Central.
2. From the SYSTEM menu, click Ports.
The Ports view is displayed.
3. Click the Front End Ports tab.
4. Expand iSCSI and select the fault domain to delete.
5. Click
(Delete).
The Delete Fault Domain dialog box opens.
6. Click Yes.
Configuring NAT Port Forwarding for iSCSI Fault Domains
Port forwarding allows iSCSI initiators (servers or remote Storage Centers) located on a public network or different private
network to communicate with Storage Center iSCSI ports on a private network behind a router that performs Network Address
Translation (NAT).
For each Storage Center iSCSI control port and physical port, the router performing NAT must be configured to forward
connections destined for a unique public IP address and TCP port pair to the private IP address and TCP port for the iSCSI port.
These port forwarding rules must also be configured in parallel on the Storage Center fault domains to make sure that iSCSI
target control port redirection functions correctly. Fault domains can only be modified by administrators.
NOTE:
If Storage Center iSCSI ports are configured for legacy mode, the port forwarding rules do not need to be defined
on the Storage Center because there is no control port redirection.
iSCSI NAT Port Forwarding Requirements for Virtual Port Mode
The following requirements must be met to configure NAT port forwarding for an iSCSI fault domain in virtual port mode.
● For each Storage Center iSCSI control port and virtual port, a unique public IP address and TCP port pair must be reserved
on the router that performs NAT.
● The router that performs NAT between the Storage Center and the public network must be configured to forward
connections destined for each public IP address and port pair to the appropriate Storage Center private target iSCSI IP
address and private port (by default, TCP port 3260).
iSCSI NAT Port Forwarding Example Configuration
In this example, a router separates the Storage Center on a private network (192.168.1.0/24) from a server (iSCSI initiator)
on the public network (1.1.1.60). To communicate with Storage Center iSCSI target ports on the private network, the server
connects to a public IP address owned by the router (1.1.1.1) on ports 9000 and 9001. The router forwards these connections to
the appropriate private IP addresses (192.168.1.50 and 192.168.1.51) on TCP port 3260.
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Storage Center Maintenance