HP StorageWorks Fabric OS 5.3.0a release notes (AA-RWEYE-TE, September 2007)

FCIP
• Frame drops observed on FCIP slow links:
• The frame drops occur when the FCIP tunnel bandwidth is set to 10 B ase-T
(10Mbp s) , E 1 (1.0 48Mbps) , or T1 (1.544 Mbps ).
• With E1 or T1, frames are dropped even without an impaired link.
• With 10 Base-T, frame drops may be observed when a low impairment
is put to the link.
• The portperfshow comm and indicated incorrect (smaller) bidirectional
throughput on the FCIP tunnel when Fastwrite/Tape Pipelining is enabled.
• Fastwrite/Tape Pipelining did not inform user when it failed due to multiple
equal paths configured on 2 GbE ports.
• Backup jobs initiated from the Symantec BackupExec application slowed
noticeably after adding significant I/O traffic from regular hosts and targets to
the FCIP tunnel. A port-based routing policy must be used for Tape devices.
Access Gateway vs
Standard Switch Mode
When usin
g the blade server SAN switch in Access Gateway mode, most switch
features are no longer applicable. These features include Admin Domains,
Advance
d Performance Monitoring, direct connection to SAN target devices,
Fibre C
hannel Arbitrated Loop support, Fabric Manager, FICON, IP over FC, ISL
Trunki
ng, Extended Fabrics, Management Services, Name Services (SNS), port
mirroring, Secure FOS, SMI-S, and Zoning. These switch features are available in
the d e
fault switch mode of operation.
Acces
s Gateway mode is not supported in the p-class Blade system if there are
two ha
lf-heightserversinthesamesleeve(ServerSlot1and9,2and10,and
soon). Twop-classhalf-heightserversinthesamesleeverequireFibreChannel
Arbi
trated Loop operation. The c-Class half-height blade servers do not require
Fibre Channel Arbitrated Loop and work fine with both access gateway mode
and Standard Switch Mode.
Access Gatewa y Mode
Port State
When a disabled port on a switch in Access Ga teway mode is connected to
aconfigured loop HBA, the port state alternates between Nosync and Insync.
The switchShow command displays the state of the remote HBA port that is
continuously attempting to reconnect to the disabled port.
Access Gateway mode is not supported in the p-Class BladeSystem if there are
two half-height servers (BL3xp) in the same sleeve (Server Slot 1 and 9, or 2 and
10, etc). That configuration requires Fibre Channel Arbitrated Loop operation,
which conflicts with Access Gateway mode. There is no such restriction with
c-Class, since n o servers require Fibre Channel Arbitrated Loop.
Access Gateway supports only FCP initiator connections on the F_Ports. Note that
cascading Access Gateway devices or connecting FCP targets, loop devices, or
FICON channel/control units on the F_Por ts are not supported.
portcfgdefault
command function
change for the Brocade
4Gb SAN Switch for HP
c-Class BladeSystem
Beginning with Fabric OS 5.2.1b, the portcfgdefault command now resets
the configuration to HP factory default port settings.
Update to Brocade
4Gb SAN Switch for
HP c-Class BladeSystem
instructions.
After connecting to the Brocade 4Gb SAN Switch via the Onboard Administrator
(OA) connect command, you will be in the switch CLI prompt. To return to
the OA serial prompt:
• Type Exit to log out of the switch.
• Press Shift-Ctrl-underscore (escape sequence) to return to the OA prompt.
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