Dynamic Mapping - Cisco MDS 9000 series 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

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:
•
•
•
If you have configured a switch name, then the switch name is used instead of the management IP
Note
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
Figure 4-5
IP host A
iSCSI iSCSI
iqn.host A
Each iSCSI initiator may not have access to all targets depending on the configured access control
Note
mechanisms (see the
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
4-6
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>
Dynamic Target Mapping
IP Network
iqn.1987-05.com.cisco:05.<mgnt-IPaddr>.01-01.3100112233445566
"iSCSI Access Control" section on page
MDS-mgntIP
Virtual iSCSI Target
iSCSI
LUN0
1/1
LUN1
LUN2
Chapter 4 Configuring iSCSI
Figure 4-5).
pwwn 31.00.11.22.33.44.55.66
LUN0
LUN1
LUN2
4-19).
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)