HP StoreFabric SN6500B Administrator's Manual page 47

3. Enter the ag
Displaying device mapping information
The ag --wwnmapshow command displays static and dynamic mapping information about all device
WWNs that have been mapped to N_Ports or N_Port groups. For each WWN, this command
displays the following:
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•
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Note that new device mappings will only be enabled and display the next time the device logs in to
the switch.
To display device mapping information, enter the ag -- wwnmapshow command.
Pre-provisioning
You can use Fabric OS commands, Web Tools, and Fabric Manager to map devices that do not yet
exist. This allows applicable management programs to push configuration changes without
worrying about the order in which they are received. For example, if system administrators need to
push a set of port group changes and a set of device mapping changes, they could push them in
either order without error. This also applies to using Fabric OS commands for device mapping. You
could also map several devices to a new port group and then create the group without error. You
can also remove one device, and then remove another device without error.
VMware configuration considerations
Enabling device mapping for individual virtual machines (VMs) running on a VMware ESX server
connected to an F_Port can redirect I/O traffic for these VMs, provided the server is configured to
use Raw Device Mapped storage. All traffic will originate from a VM's WWN and will follow any
mapping configured for the WWN. If anything interrupts the virtual port's connection for the VM,
such as a failover port being used because a port goes offline, traffic will originate from the ESX
server's base device port ID and not the VM's port ID. If there are any additional disruptions, the
server will not switch back to the virtual port, and the VM's traffic will not follow the configured
device mapping. Note that this can also occur when a VM first boots, prior to any failover.
Access Gateway Administrator's Guide
53-1002743-01
The following example enables two device WWNs.
switch:admin> ag --wwnmappingenable "10:00:00:06:2b:0f:71:0c;
10:00:00:05:1e:5e:2c:11"
wwnmappingenable command with the --all option to enable mapping for all
--
currently available WWNs. The --all option will not affect mappings made in the future. Any
mapping added for a new device (a device for which mapping is not disabled) will be enabled
by default. Disabled mappings can be modified without automatically enabling them.
The following command enables all previously disabled device mappings.
switch:admin> ag --wwnmappingenable --all
WWN - Device WWNs that are mapped to N_Ports
1st N_Port - First or primary mapped N_Port (optional)
2nd N_Port - Secondary or failover N_Port (optional)
PG_ID - Port Group ID where the device is mapped (mapped)
Current - The N_Port that the device is using (none displays if the device is not logged in)
Enabled - Indicates whether device mapping is enabled or disabled
Access Gateway mapping
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