vSphere Storage - ESXi 5.1 - Documentation - VMware
vSphere Storage - ESXi 5.1 - Documentation - VMware
vSphere Storage - ESXi 5.1 - Documentation - VMware
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<strong>vSphere</strong> <strong>Storage</strong><br />
Ports in the iSCSI SAN<br />
A single discoverable entity on the iSCSI SAN, such as an initiator or a target, represents an iSCSI node. Each<br />
node has one or more ports that connect it to the SAN.<br />
iSCSI ports are end-points of an iSCSI session. Each node can be identified in a number of ways.<br />
IP Address Each iSCSI node can have an IP address associated with it so that routing and<br />
switching equipment on your network can establish the connection between<br />
the server and storage. This address is just like the IP address that you assign<br />
to your computer to get access to your company's network or the Internet.<br />
iSCSI Name A worldwide unique name for identifying the node. iSCSI uses the iSCSI<br />
Qualified Name (IQN) and Extended Unique Identifier (EUI).<br />
By default, <strong>ESXi</strong> generates unique iSCSI names for your iSCSI initiators, for<br />
example, iqn.1998-01.com.vmware:iscsitestox-68158ef2. Usually, you do not<br />
have to change the default value, but if you do, make sure that the new iSCSI<br />
name you enter is worldwide unique.<br />
iSCSI Alias A more manageable name for an iSCSI device or port used instead of the iSCSI<br />
name. iSCSI aliases are not unique and are intended to be just a friendly name<br />
to associate with a port.<br />
iSCSI Naming Conventions<br />
iSCSI uses a special unique name to identify an iSCSI node, either target or initiator. This name is similar to<br />
the WorldWide Name (WWN) associated with Fibre Channel devices and is used as a way to universally<br />
identify the node.<br />
iSCSI names are formatted in two different ways. The most common is the IQN format.<br />
For more details on iSCSI naming requirements and string profiles, see RFC 3721 and RFC 3722 on the IETF<br />
Web site.<br />
iSCSI Qualified Name (IQN) Format<br />
The IQN format takes the form iqn.yyyy-mm.naming-authority:unique name, where:<br />
n yyyy-mm is the year and month when the naming authority was established.<br />
n naming-authority is usually reverse syntax of the Internet domain name of the naming authority. For<br />
example, the iscsi.vmware.com naming authority could have the iSCSI qualified name form of iqn.<br />
1998-01.com.vmware.iscsi. The name indicates that the vmware.com domain name was registered in<br />
January of 1998, and iscsi is a subdomain, maintained by vmware.com.<br />
n unique name is any name you want to use, for example, the name of your host. The naming authority must<br />
make sure that any names assigned following the colon are unique, such as:<br />
n iqn.1998-01.com.vmware.iscsi:name1<br />
n iqn.1998-01.com.vmware.iscsi:name2<br />
n iqn.1998-01.com.vmware.iscsi:name999<br />
Enterprise Unique Identifier (EUI) Format<br />
The EUI format takes the form eui.16 hex digits.<br />
For example, eui.0123456789ABCDEF.<br />
72 <strong>VMware</strong>, Inc.