Dell POWEREDGE M1000E - Manual (Page 58)

38 Fabric Watch Administrator’s Guide
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Fabric monitoring guidelines and default settings
6
Fabric monitoring setting guidelines
It is recommended that you leave the entire Fabric class in its default state (no alerts) for the
following reasons:
• Domain ID changes
Plan and use strict change control practices to avoid Domain ID changes.
• Loss of E_Port
Detect if an E_Port is down using the E_Port class areas.
• Fabric logins
In a large environment of numerous devices, this area is of no interest.
• Fabric reconfiguration
Fabric reconfigurations typically occur when new switches are added to a fabric, which is a
planned activity, or when an upstream or downstream ISL fails, which is detected through the
E_Port class areas. Since fabric reconfigurations are monitored elsewhere, don’t change the
default settings for the Fabric class.
• Segmentation changes
Segmentations only occur in the event of an entire switch failure. In this rare case, you can
gather multiple reports from all the attached E_Ports of the link failures.
• Zoning changes
Zone changes are captured through the Audit facility in Fabric OS. All zone changes can be
configured to be recorded in the RASlog, which is the recommended practice.
Segmentation changes
(SC) Tracks the cumulative number of segmentation changes. Segmentation changes occur
because of one of the following:
•
Zone conflicts.
•
Incompatible link parameters. During E_Port and VE_Port initialization, ports
exchange link parameters, and incompatible parameters result in segmentation.
This is a rare event.
•
Domain conflicts.
•
Segmentation of the principal link between two switches.
Zone changes (ZC) Tracks the number of zone changes. Because zoning is a security provision, frequent
zone changes might indicate a security breach or weakness. Zone change messages
occur whenever there is a change in zone configurations.
TABLE 3 Fabric class areas (Continued)
Area Description