Enabling Back-End Credit Loss Detection And Recovery; Enabling Bottleneck Detection On A Switch - HP StoreFabric SN6500B Administrator's Manual

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Enabling bottleneck detection on a switch

The following credit loss recovery methods are supported for Brocade 6520 back-end ports:
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•

Enabling back-end credit loss detection and recovery

Credit loss detection and recovery is enabled and disabled through the CLI using the
bottleneckmon --cfgcredittools command.
Notes:
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•
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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
detection parameters"
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
380
For all the credit loss methods described above, a link reset will automatically be performed,
assuming that this option was enabled. See
recovery" below for details on enabling this feature.
A manual link reset option using the bottleneckmon command is also available. See
back-end credit loss detection and recovery"
NOTE
Whenever a link reset is performed on this switch, the RASlog C3-1014 message is displayed
and recorded.
The execution of this command is subject to Virtual Fabric or Admin Domain restrictions that
may be in place. Refer to the Fabric OS Troubleshooting and Diagnostics Guide for more
information.
The bottleneck detection commands are supported on F_Ports, FL_Ports, E_Ports, and
EX_Ports.
The credit recovery commands are supported only on back-end ports of 4G, 8G, and 16G
Capable FC platforms for blades in the Brocade DCX, DCX-4S, DCX 8510-8, and DCX 8510-4
chassis.
on page 384.
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
on page 391.
"Enabling back-end credit loss detection and
below for instructions.
"Changing bottleneck
"Displaying bottleneck statistics"
Fabric OS Administrator's Guide
"Enabling
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