Brocade Network Advisor SAN User Manual v12.3.0 User Manual
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Brocade Network Advisor SAN User Manual
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Flow Mirror
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•
Direction — Bidirectional
•
Source Device — Source identifier
•
Destination Device — * (an asterisk allows you to use any port)
•
Ingress port — port number (F1)
2. Enter a name (mirror_scsismd) for the flow definition in the Name field.
The name cannot be over 20 characters and can only include alphanumeric characters or
underscores.
NOTE
For a physical switch, the name must be unique. However, for logical switches, the name does
not have to be unique.
3. Clear the Monitor check box.
4. Select the Mirror check box.
5. Select the CPU Mirroring or Local Flow Mirror option.
By default, CPU Mirroring is enabled.
6. Select the Persist over switch reboots check box to persist this flow definition over reboots.
7. Select the Activate all selected features check box to immediately activate the flow after
creation.
8. Enter an asterisk (*) in the Destination field.
9. Enter the frame type (scsicmd) in the Frame Type field.
To select a frame type from a list, click the ellipsis button. Refer to
on page 1129" for a list of the supported frame type parameters.
10. Click OK to save the flow definition.
When the flow definition activates, the Flow Vision dialog box displays with the new flow
selected (highlighted) in the Flow Definitions table. To review the sub-flow data for the selected
flow, refer to
“Monitoring a Flow Mirror flow”
Tracking latency between a host and all connected targets
You can use Flow Mirror to track the latency of SCSI Initiator-Target pairs so that you can load
balance them, which enables you to optimize application performance.
The following examples mirror all SCSI commands and their status frames initiated by device H1
ingressing through port F1, which enables you to determine the latency from the captures.
Tracking latency using CPU Mirroring
1. Right-click a port (F1) and select Fabric Vision > Flow > Add.
The Add Flow Definition dialog box displays with the following criteria and flow identifiers
pre-populated:
•
Feature — Monitor
•
Direction — Bidirectional
•
Source Device — Source identifier