Deployment Guide

Viewing Flow Monitor flows
To display Flow Monitor flows, enter flow --show flowname -feature monitor.
The displayed information includes:
• Frame Statistics: Frame count and rate for the flow-defined frame type
• Throughput Statistics: Word count and throughput (bytes per second)
• I/O Statistics: I/O count, I/O per second, and I/O data transferred on a read/write basis
• Learn Statistics: All learned ("*") flows on a given port and the throughput and frame statistics for
each learned flow on 16 GBps-capable Fibre Channel platforms
You can also repeat and sort the output of a Flow Monitor flow. For information on these tasks, refer to
Repeating flow output on page 22 and Sorting flow output on page 26.
For illustrations of flow --show command output, refer to Flow Monitor examples on page 52.
Learning in Flow Monitor flows
You can apply learning in Flow Monitor flows in order to discover flow traffic. To apply learning to a Flow
Monitor flow, you enter an asterisk inside quotation marks ("*") as the parameter value for the
parameter to be learned.
The following list outlines the support for learning on various port types:
• F_Ports. Learning and static monitoring is supported.
• E_Ports. Learning and static monitoring is supported.
• EX_Ports. Learning and static monitoring is supported.
• XISL_Ports. Fabric wide learning and static monitoring is supported.
• Backbone E_Ports. Learning and static monitoring is supported.
• Trunked ports. Learning is supported, although statistics will be gathered only on the flow associated
with the master port. These statistics are the cumulative total of all the ports on the trunk.
Notes on learning in Flow Monitor flows
The following items apply to learning in Flow Monitor flows:
• Only Gen 5 (16 Gbps-capable) Fibre Channel platforms and 8 Gbps Enhanced blades have the
capability to learn flows on a specified port.
• Only one active flow per ASIC can be a learning flow.
• Using two flows to monitor traffic ingressing and egressing on the same ASIC is only supported if
both flows are static. If one flow is a learning flow, only the static flow will count frames.
• You can use either a WWN or a PID for the srcdev and dstdev values when creating learning flows
for Flow Monitor.
Creating Flow Monitor learning flows
Using learning flows in Flow Monitor allows you to discover flow traffic without having to identify specific
devices or ports.
Refer to Monitoring flows using the learning functionality on page 53 to view how to display the data
captured using a learning flow.
Viewing Flow Monitor flows
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