C H A P T E R 49 Configuring Fibre Channel Write Acceleration; Enabling Fibre Channel Write Acceleration - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Displaying Fibre Channel Write Acceleration Information
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
The initiator and target cannot connect to the same Cisco MDS switch. Fibre Channel write acceleration
Note
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:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# ssm enable feature
scsi-flow module 2
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
Step 4
switch(config)# scsi-flow distribute
Step 5
switch(config)# scsi-flow flow-id 3
write-acceleration
switch(config)# no scsi-flow flow-id 3
write-acceleration
Step 6
switch(config)# scsi-flow flow-id 3
write-acceleration buffer 2048
switch(config)# no scsi-flow flow-id 3
write-acceleration buffer 1024
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 49-1 Displays Fibre Channel Write Acceleration Configuration for All SCSI Flow Identifiers
switch# show scsi-flow
Flow Id: 3
Cisco MDS 9000 Family CLI Configuration Guide
49-2
Example 49-1
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
Chapter 49 Configuring Fibre Channel Write Acceleration
Purpose
Enters configuration mode.
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.
Configures SCSI flow identifier 3 using the pWWNs
of the initiator and the target. The flow identifier
range is 1 to 65535.
Enables CFS distribution for the SCSI flow.
No CFS configuration commit operation is
Note
required for SCSI flow. The SCSI flow
manager uses CFS for target validation.
Enables Fibre Channel write acceleration for SCSI
flow identifier 3.
Disables SCSI flow write acceleration for SCSI flow
identifier 3. The default is disabled.
Enables Fibre Channel write acceleration for SCSI
flow identifier 3 and sets the number of buffers to
2048. The range is 1 to 40000.
Reverts to the default number of write acceleration
buffers. The default is 1024.
and Example 49-2).
OL-18084-01, Cisco MDS NX-OS Release 4.x