> # Configuring Authentication Mechanism

> You can configure iSCSI CHAP or None authentication at both the global level and at each interface level.

> The authentication for a Gigabit Ethernet interface or subinterface overrides the authentication method configured at the global level.

> ## Detailed Steps

> To configure AAA authentication for an iSCSI user, follow these steps:

> 1. Choose End Devices > iSCSI in the Physical Attributes pane.

> You see the iSCSI tables in the Information pane.

> 2. Click the Globals tab.

> You see the iSCSI authentication configuration table.

> 3. Select chap or none from the authMethod column.
> 4. Click the Apply Changes icon in Cisco DCNM-SAN to save these changes.

> To configure the authentication mechanism for iSCSI sessions to a particular interface, follow these steps:

> 1. Choose Switches > Interfaces > Gigabit Ethernet in the Physical Attributes pane.

> You see the Gigabit Ethernet configuration in the Information pane.

> 2. Click the iSNS tab.

> You see the iSCSI and iSNS configuration.

> 3. Right-click on the IscsiAuthMethod field and select none or chap.
> 4. Click the Apply Changes icon to save these changes.

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