HP StorageWorks 2.140 Director Switch - Manual (Page 194)

Optional features 194
1. Select Configure > Open Trunking.
The Configure Open Trunking dialog box is displayed, as shown in Figure 90 .
Figure 90 Configure Open Trunking dialog box
2. Click Enable Open Trunking to display a check mark and enable Open Trunking.
3. Set the Congestion Thresholds for ports as percentages of link bandwidths, in the range of
1% through 99%.
These thresholds are used only when a port becomes an ISL. When the link’s traffic load
becomes greater than this percentage, the link is seen as congested and traffic is rerouted (if
possible) to an uncongested link. Note that rerouting may not be possible if there are no
alternate links available, or if alternate links are congested or lack BB_Credits.
NOTE: Using default settings for port congestion thresholds should work well in most cases.
Normally, you will not need to set them.
4. Set the Congestion Threshold using one of these methods:
• Click the check box under the Use Algorithmic Threshold column to display a value
under the Threshold % column.
This value is computed by the feature’s rerouting algorithm. If you click this check box, you
cannot enter a value into the Threshold % column for the port.
NOTE: If you clear the check box, any value that was set in the Threshold % column for
the port is redisplays.
• Click in the Threshold % column and enter a value in the range of 1 through 99.