HP 1606 HP StorageWorks Fabric OS 6.3.2b Release Notes (5697-0777, November 20 - Page 29

Port Fencing, Zoning, ICLs, Extended Fabrics and R_RDY flow control, Fabric OS Administrator Guide.

Get HP 1606 PDF manuals and user guides View all HP 1606 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 29 highlights

FC Blade will not synchronize with a McDATA 10Gb blade, but this will not negatively impact the system. Port Fencing • For Port Fencing, once the trigger threshold is exceeded (for example, for ITWs, CRCs, or LRs), Fabric Watch waits for approximately six seconds to see if the port is going offline. If it is still online at the next poll cycle, Fabric Watch fences the port. Extensive testing has shown that ports in the process of going offline may exhibit bursts of errors. Waiting the additional six seconds to check the port status helps prevent false positives and unnecessarily fencing a port (for example, during a server reboot). • When using Port Fencing, you must first run the fwalarmsfilterset command. This command enables the port and allows you to receive Port Fencing messages. • 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. • Fabric Watch monitors state change for LISL ports, even though it is not displayed in Fabric Watch CLI commands. • 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. Zoning Beginning with Fabric OS 6.2.0, 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 lower case characters, the merge fails, since the switches do not recognize these zoning configurations as being the same. For additional details and workaround solutions, refer to the latest Fabric OS Administrator Guide. 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 will report enc_out errors. The errors are harmless, but will continue to increment. These errors will not be 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 HP StorageWorks Fabric OS 6.3.2b Release Notes 29

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
FC Blade will not synchronize with a McDATA 10Gb blade, but this will not negatively impact the
system.
Port Fencing
•
For Port Fencing, once the trigger threshold is exceeded (for example, for ITWs, CRCs, or LRs),
Fabric Watch waits for approximately six seconds to see if the port is going offline. If it is still
online at the next poll cycle, Fabric Watch fences the port. Extensive testing has shown that ports
in the process of going offline may exhibit bursts of errors. Waiting the additional six seconds to
check the port status helps prevent false positives and unnecessarily fencing a port (for example,
during a server reboot).
•
When using Port Fencing, you must first run the
fwalarmsfilterset
command. This command
enables the port and allows you to receive Port Fencing messages.
•
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.
•
Fabric Watch monitors state change for LISL ports, even though it is not displayed in Fabric Watch
CLI commands.
•
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.
Zoning
Beginning with Fabric OS 6.2.0, 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 lower case characters, the merge fails, since the switches do not recognize these zoning
configurations as being the same. For additional details and workaround solutions, refer to the latest
Fabric OS Administrator Guide.
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 will report
enc_out
errors. The errors are
harmless, but will continue to increment. These errors will not be 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
HP StorageWorks Fabric OS 6.3.2b Release Notes
29