HP 4400 HP StorageWorks Fabric OS 6.4.0c Release Notes (5697-0703, September 2 - Page 35

Port Fencing, Zoning, ICLs, Extended Fabrics and R_RDY flow control

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Blade is supported in a chassis running in interopmode 2 or 3 (SAN Director 6 Port 10Gb FC Blade to SAN Director 6 Port 10Gb FC Blade connections only). A SAN Director 6 Port 10Gb FC Blade does not synchronize with a McDATA 10Gb blade, but this does not negatively impact the system. Port Fencing • The state-changes counter used by Fabric Watch in Fabric OS 6.3 has been updated to ignore any toggling of F_Ports due to planned internal mechanisms, such as throttling and trunking. There are some Fabric OS CLI commands, such as portcfgspeed and portCfgTrunkPort, that implicitly disable/enable ports after configuration. • The Port Fencing feature is not supported for Loss of Sync (LOS) and Link Failure (LF) areas of Port/F-Port/E-Port classes. State change area can be used in place of LOS/LF areas for Port Fencing. NOTE: For more information on Port Fencing functionality, see the Brocade Fabric Watch Administrator's Guide for v6.4.0. Zoning • If the default zoning mode is set to All Access and more than 120 devices are connected to the fabric, you cannot enable All Access. • Beginning with the Fabric OS 6.2.0 release, all WWNs containing uppercase characters are automatically converted to lowercase when associated with a zone alias and stored as part of a saved configuration on a switch. For example, a WWN entered as either AA.BB.CC.DD.EE.FF.GG.HH or aa.bb.cc.dd.ee.ff.gg.hh when associated with a zone alias will be stored as aa.bb.cc.dd.ee.ff.gg.hh on a switch operating with Fabric OS 6.2.0 or later. This behavioral change in saved zone alias WWN members does not impact most environments. However, in a scenario where a switch with a zone alias WWN member with uppercase characters (saved on the switch with pre-Fabric OS 6.2.0 code) is merged with a switch with the same alias member WWN in lowercase characters, the merge fails, since the switches do not recognize these zoning configurations as being the same. For additional details and workaround solutions, see the latest Fabric OS Administrator Guide updates. ICLs • If a DC SAN Director with an 8-link ICL license is connected to a DC SAN Director with a 16-link license, the DC SAN Director with the 16-link license reports enc_out errors. The errors are harmless, but continue to increment. These errors are not reported if a DC SAN Director with a 16-link license is connected to a DC04 SAN Director with only 8-link ICL ports. • If ICL ports are disabled on only one side of an ICL link, the enabled side may see enc_out errors. Extended Fabrics and R_RDY flow control Starting with Fabric OS 5.1, the Extended Fabrics feature is supported with R_RDY flow control. (R_RDY flow control mode can be enabled using the portCfgISLMode command.) R_RDY flow control mode that uses IDLE primitives does not support frame-based trunking for devices such as Time Division Multiplexor (TDM). To overcome this limitation and provide support for frame-based trunking with Extended Fabrics, Fabric OS 6.2.x and later has been enhanced to support interoperability with these distance extension devices. HP StorageWorks Fabric OS 6.4.0c Release Notes 35

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Blade is supported in a chassis running in interopmode 2 or 3 (SAN Director 6 Port 10Gb FC Blade
to SAN Director 6 Port 10Gb FC Blade connections only). A SAN Director 6 Port 10Gb FC Blade
does not synchronize with a McDATA 10Gb blade, but this does not negatively impact the system.
Port Fencing
•
The state-changes counter used by Fabric Watch in Fabric OS 6.3 has been updated to ignore
any toggling of F_Ports due to planned internal mechanisms, such as throttling and trunking. There
are some Fabric OS CLI commands, such as
portcfgspeed
and
portCfgTrunkPort
, that
implicitly disable/enable ports after configuration.
•
The Port Fencing feature is not supported for Loss of Sync (LOS) and Link Failure (LF) areas of
Port/F-Port/E-Port classes. State change area can be used in place of LOS/LF areas for Port Fencing.
NOTE:
For more information on Port Fencing functionality, see the
Brocade Fabric Watch Administrator's
Guide for v6.4.0
.
Zoning
•
If the default zoning mode is set to All Access and more than 120 devices are connected to the
fabric, you cannot enable All Access.
•
Beginning with the Fabric OS 6.2.0 release, all WWNs containing uppercase characters are
automatically converted to lowercase when associated with a zone alias and stored as part of a
saved configuration on a switch. For example, a WWN entered as either
AA.BB.CC.DD.EE.FF.GG.HH
or
aa.bb.cc.dd.ee.ff.gg.hh
when associated with a zone alias will be
stored as
aa.bb.cc.dd.ee.ff.gg.hh
on a switch operating with Fabric OS 6.2.0 or later.
This behavioral change in saved zone alias WWN members does not impact most environments.
However, in a scenario where a switch with a zone alias WWN member with uppercase characters
(saved on the switch with pre-Fabric OS 6.2.0 code) is merged with a switch with the same alias
member WWN in lowercase characters, the merge fails, since the switches do not recognize
these zoning configurations as being the same. For additional details and workaround solutions,
see the latest Fabric OS Administrator Guide updates.
ICLs
•
If a DC SAN Director with an 8-link ICL license is connected to a DC SAN Director with a 16-link
license, the DC SAN Director with the 16-link license reports
enc_out
errors. The errors are
harmless, but continue to increment. These errors are not reported if a DC SAN Director with a
16-link license is connected to a DC04 SAN Director with only 8-link ICL ports.
•
If ICL ports are disabled on only one side of an ICL link, the enabled side may see
enc_out
errors.
Extended Fabrics and R_RDY flow control
Starting with Fabric OS 5.1, the Extended Fabrics feature is supported with R_RDY flow control.
(R_RDY flow control mode can be enabled using the
portCfgISLMode
command.) R_RDY flow
control mode that uses IDLE primitives does not support frame-based trunking for devices such as Time
Division Multiplexor (TDM). To overcome this limitation and provide support for frame-based trunking
with Extended Fabrics, Fabric OS 6.2.x and later has been enhanced to support interoperability with
these distance extension devices.
HP StorageWorks Fabric OS 6.4.0c Release Notes
35