HP StorageWorks 2/16 - SAN Switch, Руководство пользователя

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Fabric OS reference guide
166 Fabric OS 3.x Document Addendum
WAN_TOV
The wide area network timeout value (WAN_TOV) is displayed in milliseconds. This timer is
the maximum frame timeout value for a WAN, if any, interconnecting the Fibre Channel
islands.
MAX_HOPS
Maximum hops (MAX_HOPS) is an integer. It denotes the upper limit on the number of hops
a frame might have to hop to reach any destination port from any source port across the fabric.
Note: The configure parameters R_A_TOV, E_D_TOV, WAN_TOV, and MAX_HOPS are
interrelated. Assigning a specific value to one or more of these parameters might change the range
of values that can be assigned to the other parameters. As a result, the user might not be able to set
all the values within the range displayed for each parameter. To make it easier, the configure utility
validates the modified values of these four parameters and prompts the user to reenter them if the
validation check fails.
Data Field Size
This specifies the largest possible value, in bytes, for the size of a type 1 (data) frame. The
switch advertises this value to other switches in the fabric during construction of the fabric, as
well as to other devices when they connect to the fabric. Setting this to a value less than 2112
might result in decreased performance.
Sequence-Level Switching
When this feature is set to 1, frames of the same sequence from a particular source are
transmitted as a group. When set to 0, frames are transmitted interleaved among multiple
sequences.
Under normal conditions, sequence level switching should be disabled for better performance.
However, some host adapters have performance issues when receiving interleaved frames from
multiple sequences. When there are such devices attached to the fabric, sequence level
switching should be enabled.
Disable Device Probing
When this is set, devices that do not register themselves with the Name Server are not present
in the Name Server database. Set this mode only if the switch's N_Port discovery process
(PLOGI, PRLI, INQUIRY) causes some attached device to fail.
Suppress Class F Traffic
By default, the switch can send Class F frames. When this operand is turned on, Class F traffic
is converted to Class 2 traffic before being transmitted.
SYNC IO Mode
By default, SYNC IO mode is disabled. When the option is enabled, tasks on the local switch
wait for a response to its request from the remote switch before proceeding further. This option
is enabled in the remote fabric environment to assist the detection of link failure.
VC Encoded Address Mode
When this mode is set, frame source and destination addresses utilize an address format
compatible with some first-generation switches. Set this mode only if the fabric includes such
switches.