HP StorageWorks 1606 HP StorageWorks FOS 6.3.0b Release Notes (5697-0360, Apri - Page 31

FICON, Additional considerations for FICON environments

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FICON • For the DC SAN Backbone Director, FICON CUP is not allowed with a 48-port blade in the Default Logical Switch. All ports on a 48-port blade must be assigned to a user-defined Logical Switch to use them in a FICON CUP enabled switch. • If CUP is enabled in the DLS and any ports on a 48-port blade are assigned to the DLS, all ports on that blade will be persistently disabled. • The DC04 SAN Director is not supported for FICON Cascading in interopmode 2 or 3 for use in mixed fabrics with M-EOS platforms. Additional considerations for FICON environments This section provides supplemental information for users deploying Fabric OS-based platforms in FICON environments: • The DCX-4S is supported for FICON only in Brocade Native Mode (interopmode 0), and therefore is not supported for interoperability with M-EOS platforms. • For FICON environments, the 8-link ICL license is qualified only for DCX-4S to DCX-4S or DCX-4S to DCX configurations. It is not qualified for DCX to DCX configurations. For DCX to DCX configurations, use the 16-link ICL license, which is FICON qualified. • Multiple 10 Gb/sec ISLs and FCIP links can load-share between cascaded FICON directors/switches but do not load balance in a FICON configuration. Table 6 provides additional FICON information. Table 6 Information for FICON environments Area 8 Gb/s Links Comments Depending on the fulfillment method, the default fill word may be set to IDLE or ARB(FF). The fill word is changed using the portcfgfillword command. Although the fill word is always IDLE when ports log in at less than 8 Gb/s, executing the portcfgfillword command is disruptive regardless of the speed at which the ports log in. Firmware Downloads Non-disruptive Hot Code Load is supported only on director class switches (4/256, DC SAN Backbone, and DC04 SAN Directors). Non-disruptive Hot Code Load is not supported on the 8/40, 8/80, 400 MP Router, and 1606 SAN Extension switches. IFCCs may result if traffic is not stopped while downloading firmware. Firmware Downloads Replacement of a CP card in the 4/256 Director may cause disruption of I/O traffic. HP recommends that the CP be replaced during a scheduled downtime to prevent disruption in FICON environments. Firmware Downloads The CUP device must be varied offline to all MVS partitions before starting a code load. The CUP device can be varied back online after the code load completes. Failure to vary off the CUP devices may result in a CP panic. In a mixed fabric environment, an M-EOS switch must be the principal switch if the fabric Manageability is in Interopmode 2 (McDATA Fabric Mode) . Port Fencing should be used to avoid taking ports down for normal fabric events. The Manageability recommended fencing criteria and settings are listed in Table 7. Firmware download is executed sequentially if ECFM is used for downloading code to Manageability Fabric OS switches. HP StorageWorks FOS 6.3.0b Release Notes 31

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FICON
•
For the DC SAN Backbone Director, FICON CUP is not allowed with a 48-port blade in the Default
Logical Switch. All ports on a 48
–
port blade must be assigned to a user-defined Logical Switch
to use them in a FICON CUP enabled switch.
•
If CUP is enabled in the DLS and any ports on a 48-port blade are assigned to the DLS, all ports
on that blade will be persistently disabled.
•
The DC04 SAN Director is not supported for FICON Cascading in interopmode 2 or 3 for use in
mixed fabrics with M-EOS platforms.
Additional considerations for FICON environments
This section provides supplemental information for users deploying Fabric OS-based platforms in
FICON environments:
•
The DCX-4S is supported for FICON only in Brocade Native Mode (interopmode 0), and therefore
is not supported for interoperability with M-EOS platforms.
•
For FICON environments, the 8-link ICL license is qualified only for DCX-4S to DCX-4S or DCX-4S
to DCX configurations. It is not qualified for DCX to DCX configurations. For DCX to DCX config-
urations, use the 16-link ICL license, which is FICON qualified.
•
Multiple 10 Gb/sec ISLs and FCIP links can load-share between cascaded FICON directors/switches
but do not load balance in a FICON configuration.
Table 6
provides additional FICON information.
Table 6 Information for FICON environments
Comments
Area
Depending on the fulfillment method, the default fill word may be set to IDLE or ARB(FF).
The fill word is changed using the
portcfgfillword
command. Although the fill word
is always IDLE when ports log in at less than 8 Gb/s, executing the
portcfgfillword
command is disruptive regardless of the speed at which the ports log in.
8 Gb/s Links
Non-disruptive Hot Code Load is supported only on director class switches (4/256, DC
SAN Backbone, and DC04 SAN Directors). Non-disruptive Hot Code Load is not supported
on the 8/40, 8/80, 400 MP Router, and 1606 SAN Extension switches. IFCCs may result
if traffic is not stopped while downloading firmware.
Firmware
Downloads
Replacement of a CP card in the 4/256 Director may cause disruption of I/O traffic. HP
recommends that the CP be replaced during a scheduled downtime to prevent disruption
in FICON environments.
Firmware
Downloads
The CUP device must be varied offline to all MVS partitions before starting a code load.
The CUP device can be varied back online after the code load completes. Failure to vary
off the CUP devices may result in a CP panic.
Firmware
Downloads
In a mixed fabric environment, an M-EOS switch must be the principal switch if the fabric
is in Interopmode 2 (McDATA Fabric Mode) .
Manageability
Port Fencing should be used to avoid taking ports down for normal fabric events. The
recommended fencing criteria and settings are listed in
Table 7
.
Manageability
Firmware download is executed sequentially if ECFM is used for downloading code to
Fabric OS switches.
Manageability
HP StorageWorks FOS 6.3.0b Release Notes
31