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Configuring iSCSI
If a system assignment option is used to configure WWNs for an iSCSI initiator, when the configuration
is backed up to an ASCII file the system-assigned WWNs are also saved. Subsequently if you issue a
CLI write erase command, you must manually delete the WWN configuration from the ASCII file.
Making the Dynamic Initiator WWN Mapping Static
After a dynamic initiator has already logged in, you may decide to permanently keep the
automatically-assigned nWWN/pWWN mapping, so this initiator uses the same mapping the next time
it logs in.
Assigning VSAN Membership to iSCSI Hosts
By default, a host is only in VSAN 1 (default VSAN). You can configure an iSCSI host to be a member
of one or more VSANs. The IPS module creates one Fibre Channel virtual N port in each VSAN to which
the host belongs.
When an initiator is configured in any other VSAN (other than VSAN 1), for example VSAN 2, the
initiator is automatically removed from VSAN 1. If you also want it to be present in VSAN 1, you must
explicitly configure the initiator in VSAN 1.
Assigning VSANs to a iSCSI Interface
All dynamic iSCSI initiators are members of VSAN 1. The port VSAN of an iSCSI interface is the
default VSAN for all dynamic iSCSI initiators. The default port VSAN of an iSCSI interface is VSAN
1, but can be changed. All dynamic iSCSI initiators are member of the port VSAN of the iSCSI interface.
This is a 1.3(x) feature. If you downgrade to an earlier release, be sure to delete any assigned VSAN
Tip
before performing the downgrade procedure.
To modify the VSANs assigned to an iSCSI interface using Device Manager, follow these steps:
Choose Interfaces > Ethernet or iSCSI. You see the interfaces dialog box.
Step 1
Step 2
Click the iSCSI tab. You see the iSCSI interface configuration table.
Double-click on the PortVSAN column to modify the default port VSAN.
Step 3
Click Apply to save these changes, or click Cancel to discard changes.
Step 4
Configuring iSCSI Proxy Initiators
When an interface is in the proxy initiator mode, you can only configure Fibre Channel access control
(zoning) based on the Fibre Channel interface attributes--the WWN pair and available FCIDs. You
cannot configure zoning using iSCSI attributes such as the IP address or the iQN name of the iSCSI
initiator. To enforce initiator-based access control, use iSCSI based access control.
By default, each iSCSI initiator appears as one Fibre Channel initiator in transparent mode in the Fibre
Channel fabric. For some storage arrays, this appearance requires the initiator's pWWN to be manually
configured for access control purposes. This process can be quite cumbersome. The Proxy initiator
feature allows all iSCSI initiators to connect through one IPS port making it appear as one Fibre Channel
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
24-34
Chapter 24
Configuring IP Storage
OL-7753-01
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