Deployment Guide

Activating Flow Monitor flows
To activate an inactive Flow Monitor flow, enter flow --activate flowname -feature monitor. Activating
a flow automatically clears all the flow statistics for that flow.
The following example activates the Flow Monitor flow named “Flow1”:
switch:admin> flow --activate Flow1 -feature monitor
Automatic activation of a Flow Monitor flow
Flow Monitor automatically activates monitoring flows under the following conditions:
• On flow creation, unless the flow is created using the -noactivate keyword.
• On slot power-on, if any of the ports or devices defined in the flow are on the slots being powered
on. This assumes that the flow was active when the slots were powered off.
• On a High Availability (HA) failover, HA reboot, or a power cycle, if the flow was active when the
event occurred.
Deactivating Flow Monitor flows
You can deactivate Flow Monitor flows without deleting them. This allows you to create and store a
“library” of flows that you can activate when needed without having to recreate them every time they
are needed.
To deactivate a Flow Monitor flow, enter flow --deactivate flow_name -feature monitor.
NOTE
You can deactivate a single feature even though the flow is defined for multiple features. For example,
if a flow had been defined using “-feature monitor,generator”, you can deactivate only the monitoring
feature, while leaving the generator feature active.
The following example deactivates the Flow Monitor flow named “Flow1”.
switch:admin> flow --deactivate Flow1 -feature monitor
Automatic deactivation of a Flow Monitor flow
Flow Vision automatically deactivates Flow Monitor flows and stops monitoring if any of these
conditions occur:
• Slot is powered off for the ingress or egress ports defined in the flow.
• Slot is powered off for the source or destination devices defined in the flow.
• The ingress or egress port type changes to anything other than an E_Port, EX_Port, XISL_Port,
F_Port, or SIM port for a learned flow ("*"). The flow will not automatically reactivate if the port type
is changed back. You must manually reactivate such a flow.
• The ingress or egress port type changes to anything other than an E_Port, EX_Port, XISL_Port,
F_Port, or SIM port for a flow that has the lun or frametype value specified. The flow will not
automatically reactivate if the port type is changed back. You must manually reactivate such a flow.
Activating Flow Monitor flows
36 Flow Vision Administrators Guide
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