HP 8/80 Access Gateway Administrator's Guide (53-1001760-01, June 2010) - Page 38

Static versus dynamic mapping, Device mapping to port groups recommended, Access Gateway

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2 Access Gateway mapping Hosts/Targets WWN1 WWN2 WWN3 Access Gateway F_1 N_1 F_2 N_2 WWN4 F_3 N_3 WWN5 F_4 N_4 WWN6 WWN7 F_5 WWN8 F_6 N_5 FIGURE 6 Example device mapping to an N_Port Static versus dynamic mapping Device mapping can be classified as either "static" or "dynamic" as follows: • Device mapping to an N_Port and to an N_Port Group are considered static. Static mappings persist across reboots and can be saved and restored with Fabric OS configUpload and configDownload commands. • Automatic WWN load balancing, if enabled, is considered dynamic. These mappings exist only while a device is logged in. Dynamic mappings cannot be saved or edited by the administrator and do not persist across reboots. Dynamic mapping shows the current mapping for devices as opposed to original static mapping, if one had been specified. If a device is mapped to N_port group, then all mapping is dynamic. NOTE These mappings only apply to NPIV devices and cannot redirect devices that are directly attached to Access Gateway, since physically-attached devices use the port maps to connect to the fabric. Device mapping to port groups (recommended) Mapping NPIV devices to a port group is an ideal choice when a reasonably sized set of devices must connect to the same group of N_Ports, and you want the flexibility of moving the devices to any available F_Port. This type of mapping is recommended because the device will automatically connect to the least-loaded N_Port in the group if the N_Port to which the device is currently connected goes offline or is not yet online. For more information on port groups, refer to "Port Grouping policy" on page 33. 18 Access Gateway Administrator's Guide 53-1001760-01

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18
Access Gateway Administrator’s Guide
53-1001760-01
Access Gateway mapping
2
FIGURE 6
Example device mapping to an N_Port
Static versus dynamic mapping
Device mapping can be classified as either “static” or “dynamic” as follows:
•
Device mapping to an N_Port and to an N_Port Group are considered static. Static mappings
persist across reboots and can be saved and restored with Fabric OS
configUpload
and
configDownload
commands.
•
Automatic WWN load balancing, if enabled, is considered dynamic. These mappings exist only
while a device is logged in. Dynamic mappings cannot be saved or edited by the administrator
and do not persist across reboots. Dynamic mapping shows the current mapping for devices as
opposed to original static mapping, if one had been specified. If a device is mapped to N_port
group, then all mapping is dynamic.
NOTE
These mappings only apply to NPIV devices and cannot redirect devices that are directly attached to
Access Gateway, since physically-attached devices use the port maps to connect to the fabric.
Device mapping to port groups (recommended)
Mapping NPIV devices to a port group is an ideal choice when a reasonably sized set of devices
must connect to the same group of N_Ports, and you want the flexibility of moving the devices to
any available F_Port. This type of mapping is recommended because the device will automatically
connect to the least-loaded N_Port in the group if the N_Port to which the device is currently
connected goes offline or is not yet online. For more information on port groups, refer to
“Port
Grouping policy”
on page 33.
N_2
Hosts/Targets
Access Gateway
F_3
F_2
F_1
N_3
WWN1
WWN2
WWN3
WWN4
F_4
WWN5
WWN6
F_5
WWN7
N_4
N_1
F_6
WWN8
N_5