Dynamic Mapping - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Configuring iSCSI
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
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The IPS module or MPS-14/2 module does not import Fibre Channel targets to iSCSI by default. Either
Note
dynamic or static mapping must be configured before the IPS module or MPS-14/2 module makes Fibre
Channel targets available to iSCSI initiators.

Dynamic Mapping

When you configure dynamic mapping the IPS module or MPS-14/2 module imports all Fibre Channel
targets to the iSCSI domain and maps each physical Fibre Channel target port as one iSCSI target. That
is, all LUs accessible through the physical storage target port are available as iSCSI LUs with the same
LU number (LUN) as in the physical Fibre Channel target port.
The iSCSI target node name is created automatically using the iSCSI qualified name (IQN) format. The
iSCSI qualified name is restricted to a maximum name length of 223 alphanumeric characters and a
minimum length of 16 characters.
The IPS module or MPS-14/2 module creates an IQN formatted iSCSI target node name using the
following conventions because the name must be unique in the SAN:
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Note If you have configured a switch name, then the switch name is used instead of the management IP
address. If you have not configured a switch name, the management IP address is used.
With this convention, each IPS port in a Cisco MDS 9000 Family switch creates a unique iSCSI target
node name for the same Fibre Channel target port in the SAN.
For example, if an iSCSI target was created for a Fibre Channel target port with pWWN
31:00:11:22:33:44:55:66 and that pWWN contains LUN 0, LUN 1, and LUN 2, those LUNs would
become available to an IP host through the iSCSI target node name iqn.1987-05.com.cisco:05.
MDS_switch_management_IP_address.01-01.3100112233445566 (see
Cisco MDS 9000 Family Fabric Manager Configuration Guide
50-8
Static mapping—Manually creates iSCSI target devices and maps them to the whole Fibre Channel
target port or a subset of Fibre Channel LUNs. With this mapping, you must specify unique iSCSI
target names.
Static mapping should be used when iSCSI hosts should be restricted to subsets of LUs in the Fibre
Channel targets and/or iSCSI access control is needed (see the
page 50-24). Also, static mapping allows the configuration of transparent failover if the LUs of the
Fibre Channel targets are reachable by redundant Fibre Channel ports (see the
Failover" section on page
IPS Gigabit Ethernet ports that are not part of a Virtual Router Redundancy Protocol (VRRP) group
or PortChannel use this format:
iqn.1987-05.com.cisco:05.<mgmt-ip-address>.<slot#>-<port#>-<sub-intf#>.<Target-pWWN>
IPS ports that are part of a VRRP group use this format:
iqn.1987-05.com.cisco:05.vrrp-<vrrp-ID#>-<vrrp-IP-addr>.<Target-pWWN>
Ports that are part of a PortChannel use this format:
iqn.1987-02.com.cisco:02.<mgmt-ip-address>.pc-<port-ch-sub-intf#>.<Target-pWWN>
50-50).
Chapter 50 Configuring iSCSI
"iSCSI Access Control" section on
"Transparent Target
Figure 50-9).
OL-17256-03, Cisco MDS NX-OS Release 4.x