fw 05.01.00 and sw 07.01.00 edge switch 2/24 product manager user guide

Optional Features
179Edge Switch 2/24 Product Manager User Guide
Note: Using default settings for port congestion thresholds should work well in most
cases. This step is not required.
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.
If you click the check box to remove the check mark, any value that was
set in the Threshold % column for the port will redisplay.
■ Click in the Threshold % column and enter a value in the range of 1
through 99.
Note: You must either specify a value in the Threshold % column or select the Use
Algorithmic Threshold check box.
4. Set Event Notification options. Note that, if enabled, these notifications occur
the first time the events occur. Notifications are not resent while the problem
persists.
■ Unresolved Congestion. Click this check box to display a check mark
and enable notification. If enabled, an “unresolved congestion” entry is
made to the Event Log and an SNMP trap will be generated, if trap
recipients are configured through the Configure SNMP dialog box.
An unresolved congestion event occurs when the rerouting algorithm
cannot find a path for rerouting data flow and relieving congestion on an
ISL.
■ Back Pressure. Click this check box to display a check mark and enable
this option. If enabled, a back pressure entry will be made to the Event
Log and an SNMP trap will be generated if trap recipients are configured
through the Configure SNMP dialog box.
A back pressure event occurs when the percentage of time the ISL lacks
BB_Credits exceeds the threshold. A separate event also occurs when the
back pressure condition ends.