HP StorageWorks Multi-protocol Router XPath OS 7.4.1f release notes (5697-0243, January 2010)

DescriptionIssue
Certain configuration values and versions of Fabric OS switches in edge
fabrics might cause EX_Ports on the Router to be disabled when the switches
are rebooted.
Evidence of the unexpected disabled EX_Port can be seen in the Router's
port display:
# switchshow
:
7 id AN No_Light disabled EX_PORT
(Last error: Failed to init in time)
Workaround for switches running FOS 3.x /4.x:
• Issue the diagdisablepost command on edge switches connected
to Router EX_Ports.
• Upgrade edge switches to Fabric OS 3.x/4.x.
• Manually enable any disabled EX_Ports when the condition occurs.
Edge fabric switch booting and
EX_Ports
If an edge fabric, in which multiple EX_Ports are linked to multiple edge
switches, segments into two or more fabrics, all EX_Ports connected to any
of the new fabrics resulting from the segmentation will be disabled due to
a fabric ID (FID) conflict error. If the edge fabric remerges into a single
fabric, the EX_Ports that were disabled remain disabled until enabled
administratively. This characteristic is designed to prevent erroneous
meta-SAN configurations from forming.
Edge fabric segmentation
Fibre Channel test equipment must use a maximum frame size of 2048 bytes
or less when used with the MP Router.
Fibre Channel HBAs are not affected by this issue, because maximum frame
size is typically negotiated during N_Port login (PLOGI).
Fibre Channel test equipment
Table 6 FCIP service
DescriptionIssue
With routed fabrics, serverless backup using SCSI Extended Copy (XCOPY)
commands is not supported if the backup server and copy manager reside on
different fabrics and the target descriptors in the Extended Copy command
contain port IDs (descriptor type codes E1h or E2h).
Serverless backup applica-
tions and routed fabrics
MP Router Fibre Channel over IP (FCIP) ports utilized for Continuous Access
EVA, XP, or HSG80 DRM must have the exchange-based trunking feature
disabled. Disable exchange trunking across FCIP port processors using the
following commands:
portCfgFcip -m 2
FCIP portcfgfcip [-m LOAD_BAL (1-exchange, 2-SID_DID,
3-none]
The default is 1. The value must be set to 2 or 3 for Continuous Access EVA,
XP, or HSG80 DRM.
FCIP with Continuous Access
EVA, XP, or HSG80 DRM
(exchange-based trunking
feature)
Support for multiple FCIP Links between locations was added in XPath 7.0.3b.
This feature is supported with Continuous Access XP only.
Multiple FCIP Links not suppor-
ted with Continuous Access
EVA or HSG80 DRM
All Continuous Access XP configurations using the MP Router require a minimum
of 45 Mbps IP bandwidth.
FCIP with Continuous Access
XP
8