HP 4400 HP B-series Fabric OS 6.3.2d Release Notes (5697-1105, July 2011) - Page 31

-Gb link initialization and fill words, Overview, portcfgfillword behavior summary, behavior summary

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When connecting to an extension device that does not support ARB primitives (such as some TDM products), the following configuration must be used: • portcfgqos -disable • portcfgcreditrecovery -disable • portcfglongdistance 0 The fabric parameter fabric.ops.mode.longdistance is now deprecated and should not be used. 8-Gb link initialization and fill words Overview The Fibre Channel Physical Interfaces (FC-PI) standard defines the requirements for a physical layer. It considers all aspects of transmit, receive, and cable-plant performance requirements for optical and electrical links. The FC-PI standard has been modified to support new physical-layer variants that operate at higher data rates than those specified in FC-PI-2. The standard enables interoperability of transmitter devices, receiver devices, interconnects, and components from different manufacturers. New variants include support for a data rate of 800 MB/s. The previous implementation by Brocade was to use Idles for link initialization and as fill words, which works for 1-Gb, 2-Gb, 4-Gb, and most 8-Gb devices. However, some of the new 8-Gb devices may require that the ARB(FF)/ARB(FF) sequence have successful link initialization. Brocade has developed an implementation of ARB(FF)/ARB(FF) for initialization and fill words. The portcfgfillword command, first introduced in Fabric OS 6.1.2, configures the ARB(FF)/ARB(FF) implementation. See the Fabric OS Command Reference Manual supporting Fabric OS 6.3.1 for details on the portcfgfillword command. portcfgfillword behavior summary • Default mode The only mode of operation in releases prior to Fabric OS 6.1.2 was the Idle implementation. Fabric OS 6.2.0a and 6.2.0b defaulted to ARB(FF)/ARB(FF) for 8-Gb devices. With 6.1.2x and 6.2.0d and later, the default reverted to the Idle implementation. The portCfgFillWord command was also implemented beginning with these versions, and enables the user to configure the ARB(FF) configuration. • Existing product For products in the field, this change has no effect on current configurations. The mode is currently 0, and during a firmware upgrade, the mode will remain 0 and no devices will be impacted. If a new device is added to the configuration, and it requires the ARB(FF) sequence, the ports can be configured at that time. Loading Fabric OS 6.1.2x or later does not automatically change the mode (with the exception of 6.2.0a and 6.2.0b, as noted above). In current configurations, the mode must be changed manually. This does not affect 1-Gb, 2-Gb, or 4-Gb devices. Any mode settings of 1, 2, or 3 have no effect on these devices; they affect only devices that negotiate or are fixed at 8-Gb speeds. • Changing the mode after Fabric OS 6.1.2x or later has been installed If you change the mode after installing Fabric OS 6.1.2x or later, with the exception as noted above for 6.2.0a and 6.2.0b, the portCfgFillWord command changes the configuration parameter in accordance with the selected mode, and automatically disables/enables the port for which the command was invoked. Subsequent link initializations will default to the new mode setting. • Other scenarios HP B-series Fabric OS 6.3.2d Release Notes 31

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When connecting to an extension device that does not support ARB primitives (such as some TDM
products), the following configuration must be used:
•
portcfgqos -disable <port>
•
portcfgcreditrecovery –disable <port>
•
portcfglongdistance <port><LD|LD>0<distance>
The fabric parameter
fabric.ops.mode.longdistance
is now deprecated and should not be
used.
8-Gb link initialization and fill words
Overview
The Fibre Channel Physical Interfaces (FC-PI) standard defines the requirements for a physical layer.
It considers all aspects of transmit, receive, and cable-plant performance requirements for optical and
electrical links. The FC-PI standard has been modified to support new physical-layer variants that
operate at higher data rates than those specified in FC-PI-2. The standard enables interoperability of
transmitter devices, receiver devices, interconnects, and components from different manufacturers.
New variants include support for a data rate of 800 MB/s. The previous implementation by Brocade
was to use Idles for link initialization and as fill words, which works for 1-Gb, 2-Gb, 4-Gb, and most
8-Gb devices. However, some of the new 8-Gb devices may require that the ARB(FF)/ARB(FF) sequence
have successful link initialization. Brocade has developed an implementation of ARB(FF)/ARB(FF) for
initialization and fill words. The
portcfgfillword
command, first introduced in Fabric OS 6.1.2,
configures the ARB(FF)/ARB(FF) implementation. See the
Fabric OS Command Reference Manual
supporting Fabric OS 6.3.1
for details on the
portcfgfillword
command.
portcfgfillword
behavior summary
•
Default mode
The only mode of operation in releases prior to Fabric OS 6.1.2 was the Idle implementation.
Fabric OS 6.2.0a and 6.2.0b defaulted to ARB(FF)/ARB(FF) for 8-Gb devices. With 6.1.2x and
6.2.0d and later, the default reverted to the Idle implementation. The
portCfgFillWord
command
was also implemented beginning with these versions, and enables the user to configure the ARB(FF)
configuration.
•
Existing product
For products in the field, this change has no effect on current configurations. The mode is currently
0, and during a firmware upgrade, the mode will remain 0 and no devices will be impacted. If
a new device is added to the configuration, and it requires the ARB(FF) sequence, the ports can
be configured at that time.
Loading Fabric OS 6.1.2x or later does not automatically change the mode (with the exception
of 6.2.0a and 6.2.0b, as noted above). In current configurations, the mode must be changed
manually. This does not affect 1-Gb, 2-Gb, or 4-Gb devices. Any mode settings of 1, 2, or 3 have
no effect on these devices; they affect only devices that negotiate or are fixed at 8-Gb speeds.
•
Changing the mode after Fabric OS 6.1.2x or later has been installed
If you change the mode after installing Fabric OS 6.1.2x or later, with the exception as noted
above for 6.2.0a and 6.2.0b, the
portCfgFillWord
command changes the configuration
parameter in accordance with the selected mode, and automatically disables/enables the port
for which the command was invoked. Subsequent link initializations will default to the new mode
setting.
•
Other scenarios
HP B
–
series Fabric OS 6.3.2d Release Notes
31