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
48-2
Cisco MDS 9000 Family CLI Configuration Guide
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Chapter 48 Configuring Fibre Channel Write Acceleration
Displaying Fibre Channel Write Acceleration Information
Note
The initiator and target cannot connect to the same Cisco MDS switch. Fibre Channel write acceleration
requires that the initiator and target must each connect to an SSM module installed on different Cisco
MDS switches.
Enabling Fibre Channel Write Acceleration
To enable Fibre Channel write acceleration, and optionally modify the number of write acceleration
buffers, follow these steps:
Displaying Fibre Channel Write Acceleration Information
Use the
show scsi-flow
command to display information about the status of the Fibre Channel write
acceleration configuration (see
Example 48-1
and
Example 48-2
).
Example 48-1 Displays Fibre Channel Write Acceleration Configuration for All SCSI Flow Identifiers
switch#
show scsi-flow
Flow Id: 3
Initiator VSAN: 101
Initiator WWN: 21:00:00:e0:8b:05:76:28
Target VSAN: 102
Target WWN: 21:00:00:20:37:38:7f:7d
Command
Purpose
Step 1
switch#
config t
switch(config)#
Enters configuration mode.
Step 2
switch(config)#
ssm enable feature
scsi-flow module 2
Enables SCSI flow services on the SSM in slot 2.
Note
Fibre Channel write acceleration can only be
configured on all interfaces on the SSM, not
on groups of interfaces.
Step 3
switch(config)#
scsi-flow flow-id 3
initiator-vsan 2 initiator-pwwn
21:00:00:e0:8b:07:5f:aa target-vsan 4
target-pwwn 2a:20:00:05:30:00:77:e0
Configures SCSI flow identifier 3 using the pWWNs
of the initiator and the target. The flow identifier
range is 1 to 65535.
Step 4
switch(config)#
scsi-flow distribute
Enables CFS distribution for the SCSI flow.
Note
No CFS configuration commit operation is
required for SCSI flow. The SCSI flow
manager uses CFS for target validation.
Step 5
switch(config)#
scsi-flow flow-id 3
write-acceleration
Enables Fibre Channel write acceleration for SCSI
flow identifier 3.
switch(config)#
no scsi-flow flow-id 3
write-acceleration
Disables SCSI flow write acceleration for SCSI flow
identifier 3. The default is disabled.
Step 6
switch(config)#
scsi-flow flow-id 3
write-acceleration buffer 2048
Enables Fibre Channel write acceleration for SCSI
flow identifier 3 and sets the number of buffers to
2048. The range is 1 to 40000.
switch(config)#
no scsi-flow flow-id 3
write-acceleration buffer 1024
Reverts to the default number of write acceleration
buffers. The default is 1024.
Содержание 9124 - Cisco MDS Fabric Switch
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