Brocade Network Advisor SAN User Manual v12.3.0 - Manual (Page 1249)

Brocade Network Advisor SAN User Manual 1197
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Flow Mirror
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8. Click Close to close the Flow Vision dialog box.
Flow Mirror example procedures
The following use cases describe how to use Flow Mirror to troubleshoot typical fabric performance
problems.
Diagnosing SCSI reserve and SCSI release performance
If there is excessive SCSI reserve and release activity in a virtualized environment, you can use
Flow Mirror to identify the affected LUNs. The following example creates a flow to mirror all the SCSI
release frames from multiple servers to LUNs on the target port 1/20. You can then analyze the
mirrored frames to determine the impacted LUNs.
1. Right-click a target port (1/20) 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
• Destination Device — * (an asterisk allows you to use any port)
• Egress port — port number (1/20)
Mirrored Frames Count (frames) The number of mirrored frames as reported in the last data point
received for the flow.
Mirrored Transmit Frames (frames) The number of transmitted mirrored frames as reported in the last data
point received for the flow.
Mirrored Receive Frames (frames) The number of received mirrored frames as reported in the last data
point received for the flow.
Ingress Port The ingress port defined in the flow definition. The port name is a
hyperlink. Click to launch the port’s property sheet. A yellow icon
indicates a bottlenecked port.
Egress Port The egress port defined in the flow definition. The port name is a
hyperlink. Click to launch the port’s property sheet. A yellow icon
indicates a bottlenecked port.
Mirror Port The mirror port identifier defined in the flow definition.
LUN Any LUN values defined in the flow definition.
Bi-Directional Whether the flow is bidirectional (yes) or not (no).
Flow Definition Persistence Whether the flow is configured to persist over switch reboots (yes) or
not (no).
Last Updated Time The date and time the sub-flow was last updated.
TABLE 97 Flows table fields and components (Mirror Flow) (Continued)
Field and components Description