HP StorageWorks Multi-protocol Router XPath OS 7.4.1e Release Notes (AV-RW5LN-TE, August 2007)

Issue
Description
• Manually enable
any disabled EX_Ports when the condition occurs.
Edge fabric segmentation 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 administratively enabled. This characteristic is by
design, to prevent erroneous meta-SAN configurationsfromforming.
Fibre Channel test equipment
Fibre Channel test equipment must use a maximum frame size of 2048 bytes or less
when used with the MP Router.
FibreChannelHBAsarenotaffectedbythisissue,becausemaximumframesize
is typically negotiated during N_Port login (PLOGI) .
Table 7 FCIP service
Issue
Description
Serverless backup
applications and
routed fabrics
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 descriptor(s) in the Extended Copy command
contains port IDs (descriptor type codes E1h or E2h).
FCIP with Continuous
Access EVA, XP,
or HSG80 DRM
(exchange-based
trunking feature)
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.
Disabling exchange trunking across FCIP port processors can be accomplished
using the following commands:
portCfgFcip -m 2
FCIP portcfgfcip [-m LOAD_BAL (1-exchange, 2-SID_DID,
3-none]
The default is 1. Must be set to 2 or 3 for Continuous Access EVA, XP, or HSG80
DRM.
Multiple FCIP Links
not supported with
Continuous Access EVA
or HSG80 DRM
Support for multiple FCIP Links between locations was added in XPath 7.0.3b.
This feature is supported with Continuous Access XP only.
FCIP with Continuous
Access XP
All Continuous Access XP configurations using the MP Router require a minimum
of 45 Mbps IP bandwidth.
FCIP and firewalls The Multi-protocol Router uses XPP as the transport layer for FCIP transmission.
When a firewall is in the path of the FCIP tunnel, the firewall must be confi gured
to allow protocol type 206 in the IP hea der. The purpose of this protocol t ype is to
establish a connection and enable the FCIP trafficthattraversesthefirewall.
FCIP link
The FCIP selective acknowledgement feature was added in a previous version
of firmware.
This feature improves FCIP performance in conditions with h igh latency and
packet loss.
To ensure this feature is available, verify tha t MP Routers on both sides of the
link are using 7.4.0 version firmw ar e.
If one s ide of the link is running firmware that does not support this feature, the
link will not be established and switchShow will display incompatible
firmware for that VE_PORT .
Wide area network
services and FCIP
Available Bandwidth Parameter.
Previous releases of FCIP demonstrated performance degradation and intermittent
ISL failure if the IP network’s available bandwidth for the ISL was restricted to less
than 400 Mbps.
This release includes a new parameter for th e portCfgFcip CLI command.
The parameter is -b i where i is the available ISL bandwidth in Mbps, rounded
down to the closest integer value.
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