Emulex 355 Load Indicators, Fairness and Prioritization, To change the load balancing settings

INSPEED™ SAN STORAGE SWITCH MODEL 355	CHAPTER 3 SWITCH MANAGEMENT
USER’S GUIDE

Figure 3-25: Load Balancing page

The page is arranged as a grid of check boxes for assigning ports to cascades ("Trunk Groups").

Load Indicators

The Load Balancing page incorporates two sets of visual indicators for measuring traffic:

•Port Load Indicators–the horizontal bars on the right side of the page that display the current load for each port.

•Trunk Load Indicators–the vertical bars at the bottom of the page that display the current load for each trunk group.

These bars indicate the amount of traffic across a trunk or port. The size of the bars increase in correlation to the amount of traffic and, as a bar’s size increases, can identify a specific trunk or port that is overloaded. If overloading occurs, move one or more ports to a different trunk in the group.

To change the load balancing settings:

1.Click a Trunk Group option to place a port into a specific trunk group.

2.Continue to assign ports to trunk groups as necessary.

3.When finished, click Submit.

Fairness and Prioritization

The concept of "fairness" is based on the principle of ensuring fair device access and communication across all devices in a storage system. The switch incorporates fairness and prioritization through InSpeed technology and Automatic Trunking and Load Balancing functionality. In cooperation with each other, these features ensure even and equal access through multiple links fairly–effectively multiplying bandwidth.

Device prioritization can be achieved using Load Balancing and assigning only a specific device port to a particular cascade. This ensures a specific device will always have a dedicated trunk.

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