HP 1606 Fabric Watch Administrator's Guide v6.4.0 (53-1001770-01, June 2010) - Page 84

FOP_Port and FCU_Port subclass setting guidelines, Areas: Link Failure Count

Page 84 highlights

7 Port class guidelines and default settings FOP_Port and FCU_Port subclass setting guidelines FOP_Port and FCU_Port guidelines for the areas listed below represent a more aggressive approach in most areas. NOTE The settings in these subclasses include settings for the host bus adapter (HBA) ports as well as the storage ports. • Areas: Link Failure Count, Loss of Synchronization Count Change the default high boundary from 500 to 15 (per minute) for Link Failure Count and from 500 to 45 (per minute) for Loss of Synchronization Count. Leave the Buffer setting to 0 (the default). Set the alarm configurations to send alerts to both the error log and SNMP. These settings are the same for an HBA port or a storage port. • Area: Loss of Signal Count Unlike the other areas, take a conservative approach for the Loss of Signal Count area. Change the default high boundary from 5 to 45 (per minute) and set the alarm configuration to send alerts to both the error log and SNMP. • Areas: Invalid Transmission Words, Invalid CRC Count For these two classes, the high boundary settings are split. For Host devices, keep the defaults of 1000 (per minute) and buffer of 100. For storage devices, tighten the boundaries substantially: change the default high boundary for Invalid Transmission Words to 80, and change the high boundary for Invalid CRC Count to 40 (per minute). Hosts and HBAs reboot so do not set alerts for these devices. Storage devices, however, should not be rebooting, so you should set the alarm to alert more frequently. Excessive invalid words or CRCs on F/FL_ports lead to fabric congestion and possible frame drops if left unchecked; therefore, set the alarm to fence the port. See "Port configuration" on page 68 for instructions. In addition, set the alarm configurations to send alerts to both the error log and SNMP. • Areas: Receive (Rx) Performance, Transmit (Tx) Performance Rx and Tx Performance areas are used to monitor the bandwidth utilization of the device ports in the fabric. Set the high boundary to 85% and the alarms to Above and In-Between conditions. The same levels should be set on both Host and storage device ports. NOTE With the increased use of virtual environments, alerts from device ports are increasing more than ever in the past. This provides a good gauge as to the overall bandwidth requirement changes and utilization and could indicate that additional ISL trunks are required. • Area: Link Reset The goal of the Link Reset area is to avoid excessive link resets which can cause back pressure in the fabric. The Link Reset area is new; therefore, recommended settings are not available. Keep the default settings, monitor the results, and adjust your settings accordingly. 64 Fabric Watch Administrator's Guide 53-1001770-01

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64
Fabric Watch Administrator’s Guide
53-1001770-01
Port class guidelines and default settings
7
FOP_Port and FCU_Port subclass setting guidelines
FOP_Port and FCU_Port guidelines for the areas listed below represent a more aggressive
approach in most areas.
NOTE
The settings in these subclasses include settings for the host bus adapter (HBA) ports as well as the
storage ports.
Areas: Link Failure Count, Loss of Synchronization Count
Change the default high boundary from 500 to 15 (per minute) for Link Failure Count and from
500 to 45 (per minute) for Loss of Synchronization Count. Leave the Buffer setting to 0 (the
default). Set the alarm configurations to send alerts to both the error log and SNMP. These
settings are the same for an HBA port or a storage port.
Area: Loss of Signal Count
Unlike the other areas, take a conservative approach for the Loss of Signal Count area. Change
the default high boundary from 5 to 45 (per minute) and set the alarm configuration to send
alerts to both the error log and SNMP.
Areas: Invalid Transmission Words, Invalid CRC Count
For these two classes, the high boundary settings are split. For Host devices, keep the defaults
of 1000 (per minute) and buffer of 100. For storage devices, tighten the boundaries
substantially: change the default high boundary for Invalid Transmission Words to 80, and
change the high boundary for Invalid CRC Count to 40 (per minute).
Hosts and HBAs reboot so do not set alerts for these devices. Storage devices, however, should
not be rebooting, so you should set the alarm to alert more frequently.
Excessive invalid words or CRCs on F/FL_ports lead to fabric congestion and possible frame
drops if left unchecked; therefore, set the alarm to fence the port. See
“Port configuration”
on
page 68 for instructions. In addition, set the alarm configurations to send alerts to both the
error log and SNMP.
Areas: Receive (Rx) Performance, Transmit (Tx) Performance
Rx and Tx Performance areas are used to monitor the bandwidth utilization of the device ports
in the fabric. Set the high boundary to 85% and the alarms to Above and In-Between
conditions. The same levels should be set on both Host and storage device ports.
NOTE
With the increased use of virtual environments, alerts from device ports are increasing more
than ever in the past. This provides a good gauge as to the overall bandwidth requirement
changes and utilization and could indicate that additional ISL trunks are required.
Area: Link Reset
The goal of the Link Reset area is to avoid excessive link resets which can cause back pressure
in the fabric. The Link Reset area is new; therefore, recommended settings are not available.
Keep the default settings, monitor the results, and adjust your settings accordingly.