C H A P T E R 49 Configuring The San Extension Tuner; About The San Extension Tuner; San Extension Tuner Setup - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

About the SAN Extension Tuner

S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Figure 49-1
The SET feature assists with tuning by generating varying SCSI traffic workloads. It also measures
throughput and response time per I/ O over an FCIP link.
Before tuning the SAN fabric, be aware of the following guidelines:
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SAN Extension Tuner Setup

Figure 49-2
not a part of the FCIP link for which the throughput and latency is measured.
Cisco MDS 9000 Family Fabric Manager Configuration Guide
49-2
SCSI Command Generation to the Virtual Target
Virtual initiator
Following these implementation details:
The tuned configuration is not persistent.
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The virtual N ports created do not register FC4 features supported with the name server. This is
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to avoid the hosts in the SAN from discovering these N ports as regular initiators or targets.
Login requests from other initiators in the SAN are rejected.
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The virtual N ports do not implement the entire SCSI suite; it only implements the SCSI read
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and write commands.
Tuner initiators can only communicate with tuner targets.
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Verify that the Gigabit Ethernet interface is up at the physical layer (GBIC and Cable connected—an
IP address is not required).
Enable iSCSI on the switch (no other iSCSI configuration is required).
Enable the interface (no other iSCSI interface configuration is required) (see the
Interfaces" section on page
Configure the virtual N ports in a separate VSAN or zone as required by your network.
Be aware that a separate VSAN with only virtual N ports is not required, but is recommended as
some legacy HBAs may fail if logins to targets are rejected.
Do not use same Gigabit Ethernet interface to configure virtual N ports and FCIP links—use
different Gigabit Ethernet interfaces. While this is not a requirement, it is recommended as the
traffic generated by the virtual N ports may interfere with the performance of the FCIP link.
provides a sample physical setup in which the virtual N ports are created on ports that are
Virtual target
Read/Write I/O
WAN/MAN
IPS
fabric
50-5).
Chapter 49 Configuring the SAN Extension Tuner
FC FC
IPS
fabric
"Creating iSCSI
OL-17256-03, Cisco MDS NX-OS Release 4.x