Administrator Guide

Fabric OS Administrator’s Guide 431
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Enabling bottleneck detection on a switch
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Enabling bottleneck detection on a switch
Enabling bottleneck detection permits both latency and congestion detection.
Bottleneck detection is enabled on a switch basis. It is recommended that you enable bottleneck
detection on every switch in the fabric. If you later add additional switches, including logical
switches, to the fabric, be sure to enable bottleneck detection on those switches as well.
When you enable bottleneck detection on a switch, the settings are applied to all eligible ports on
that switch. If ineligible ports later become eligible or, in the case of a logical switch, if ports are
moved to the logical switch, bottleneck detection is automatically applied to those ports.
You can later override these settings on a per-port basis, as described in “Changing bottleneck
detection parameters” on page 435.
Use the following procedure to enable bottleneck detection.
1. Connect to the switch and log in using an account with admin permissions.
2. Enter the bottleneckmon --enable command to enable bottleneck detection on all eligible
ports on the switch.
By default, alerts are not sent unless you specify the alert parameter; however, you can view a
history of bottleneck conditions for the port as described in “Displaying bottleneck statistics”
on page 442.
3. Repeat step 1 and step 2 on every switch in the fabric.
NOTE
A best practice is to use the default values for the alerting and sub-second latency criterion
parameters.
The following example enables bottleneck detection on the switch with alerts using default values
for thresholds and time, and is the recommended manner of enabling bottleneck detection
switch:admin> bottleneckmon --enable -alert
The following example enables bottleneck detection on the switch without alerts. In this case, even
though alerts are not delivered, you can still view the bottleneck history using either the CLI or BNA.
switch:admin> bottleneckmon --enable
Displaying bottleneck detection configuration details
Use the following procedure to display the bottleneck detection configuration details:
1. Connect to the switch and log in using an account with admin permissions.
2. Enter the bottleneckmon --status command to display the details of bottleneck detection
configuration for the switch, which includes the following details:
• Whether the feature is enabled
• Switch-wide parameters
• Per-port overrides, if any
• Excluded ports