vSphere Storage - ESXi 5.1 - Documentation - VMware

vSphere Storage
3 To configure one-way CHAP, under CHAP specify the following:
a Select the CHAP security level.
n Do not use CHAP unless required by target (software and dependent hardware iSCSI only)
n Use CHAP unless prohibited by target
n Use CHAP (software and dependent hardware iSCSI only). To configure mutual CHAP, you
must select this option.
b Specify the CHAP name.
Make sure that the name you specify matches the name configured on the storage side.
n To set the CHAP name to the iSCSI initiator name, select Use initiator name.
n To set the CHAP name to anything other than the iSCSI initiator name, deselect Use initiator
name and type a name in the Name text box.
c Enter a one-way CHAP secret to be used as part of authentication. Use the same secret that you enter
on the storage side.
4 To configure mutual CHAP, first configure one-way CHAP by following the directions in Step 3.
Make sure to select Use CHAP as an option for one-way CHAP. Then, specify the following under Mutual
CHAP:
a Select Use CHAP.
b Specify the mutual CHAP name.
c Enter the mutual CHAP secret. Make sure to use different secrets for the one-way CHAP and mutual
CHAP.
5 Click OK.
6 Rescan the initiator.
If you change the CHAP or mutual CHAP parameters, they are used for new iSCSI sessions. For existing
sessions, new settings are not used until you log out and log in again.
Set Up CHAP for iSCSI Adapter in the vSphere Web Client
When you set up CHAP name and secret at the iSCSI adapter level, all targets receive the same parameters
from the adapter. By default, all discovery addresses or static targets inherit CHAP parameters that you set
up at the adapter level.
The CHAP name should not exceed 511 alphanumeric characters and the CHAP secret should not exceed 255
alphanumeric characters. Some adapters, for example the QLogic adapter, might have lower limits, 255 for the
CHAP name and 100 for the CHAP secret.
Prerequisites
n Before setting up CHAP parameters for software or dependent hardware iSCSI, determine whether to
configure unidirectional or bidirectional CHAP. Independent hardware iSCSI adapters do not support
bidirectional CHAP.
n Verify CHAP parameters configured on the storage side. Parameters that you configure must match the
ones one the storage side.
n Required privilege: Host.Configuration.Storage Partition Configuration
Procedure
1 Display storage adapters and select the iSCSI adapter to configure.
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