HP 1606 HP B-series Fabric OS 6.4.1b Release Notes (5697-0886, March 2011-incl - Page 31

Additional considerations for FICON environments

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NOTE: For information about specific versions of Fabric OS support for FICON, see the B-series FICON Connectivity Stream. Additional considerations for FICON environments This section provides supplemental information for users deploying Fabric OS-based platforms in FICON environments: • The HP StorageWorks DC04 SAN Director is supported for FICON only in Brocade Native Mode (interopmode 0), and therefore is not supported for interoperability with M-EOS platforms. • Multiple 10 Gb/s ISLs and FCIP links can load-share between cascaded FICON directors/switches but do not load balance in a FICON configuration. • For HP StorageWorks 8/40 or 8/80 SAN Switches with factory installed Fabric OS 6.3.1a that will be configured in FICON environments, there is an issue with PID assignment. See "Miscellaneous" (page 36) for further details on this issue and how to avoid it. Table 6 (page 31) provides additional FICON information. Table 6 Information for FICON environments Area Firmware Downloads Firmware Downloads Firmware Downloads Manageability Manageability Manageability Manageability Manageability Manageability Optics Serviceability Serviceability Comments 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. 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. 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 is in Interopmode 2 (McDATA Fabric Mode) . 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 (page 32). Firmware download is executed sequentially if DCFM is used for downloading code to Fabric OS switches. As a best practice for deploying Fabric OS switches and directors into a FICON environment, verify the Fabric OS version shipped with the most current Fabric OS recommendation. HP recommends that you update all Fabric OS switches and directors to the same Fabric OS levels for production. The remote CUP may not work when the channel is connected to an 8Gb blade on a 4/256 director cascaded to a remote switch. FMS must be enabled on the local switch for the remote CUP to work. HP recommends using 50 micron multimode fiber optic cabling rated at 2000 MHz-km (OM3 fiber) for connecting to 8 Gb/s short wavelength (SX) small form factor pluggable optics (SFPs). Other 50 micron and 62.5 micron multimode fiber may be used as an alternative, but distance limitations may exist. Performance of optical links depends on the cleanliness of the cables and connectors, especially at 8 Gb/s or higher speeds. For proper cable maintenance, consult your switch and cable vendors. The 8Gb 48 port blade is supported as follows: • The switch, or logical switch, must be configured for Brocade Native mode (interopmode 0). • Only on VF-enabled chassis on the DC SAN Director. • Not supported in the default switch on the DC SAN Director. Important notes and recommendations 31

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NOTE:
For information about specific versions of Fabric OS support for FICON, see the B-series
FICON Connectivity Stream.
Additional considerations for FICON environments
This section provides supplemental information for users deploying Fabric OS-based platforms in
FICON environments:
•
The HP StorageWorks DC04 SAN Director is supported for FICON only in Brocade Native
Mode (interopmode 0), and therefore is not supported for interoperability with M-EOS platforms.
•
Multiple 10 Gb/s ISLs and FCIP links can load-share between cascaded FICON
directors/switches but do not load balance in a FICON configuration.
•
For HP StorageWorks 8/40 or 8/80 SAN Switches with factory installed Fabric OS 6.3.1a
that will be configured in FICON environments, there is an issue with PID assignment. See
“Miscellaneous” (page 36)
for further details on this issue and how to avoid it.
Table 6 (page 31)
provides additional FICON information.
Table 6 Information for FICON environments
Comments
Area
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 (page 32)
.
Manageability
Firmware download is executed sequentially if DCFM is used for downloading code to Fabric OS
switches.
Manageability
As a best practice for deploying Fabric OS switches and directors into a FICON environment, verify
the Fabric OS version shipped with the most current Fabric OS recommendation. HP recommends
that you update all Fabric OS switches and directors to the same Fabric OS levels for production.
Manageability
The remote CUP may not work when the channel is connected to an 8Gb blade on a 4/256 director
cascaded to a remote switch.
Manageability
FMS must be enabled on the local switch for the remote CUP to work.
Manageability
HP recommends using 50 micron multimode fiber optic cabling rated at 2000 MHz-km (OM3 fiber)
for connecting to 8 Gb/s short wavelength (SX) small form factor pluggable optics (SFPs). Other
50 micron and 62.5 micron multimode fiber may be used as an alternative, but distance limitations
may exist.
Optics
Performance of optical links depends on the cleanliness of the cables and connectors, especially
at 8 Gb/s or higher speeds. For proper cable maintenance, consult your switch and cable vendors.
Serviceability
The 8Gb 48 port blade is supported as follows:
•
The switch, or logical switch, must be configured for Brocade Native mode (interopmode 0).
•
Only on VF-enabled chassis on the DC SAN Director.
•
Not supported in the default switch on the DC SAN Director.
Serviceability
Important notes and recommendations
31