Troubleshoot QoS

Quality of service (QoS) provides several methods to troubleshoot QoS problems.

Communications trace

Your server provides a communication trace to collect data on a communication line, such as a local area network (LAN) or wide area network (WAN) interface. The average user might not understand the entire contents of the trace data. However, you can use the trace entries to determine whether a data exchange between two points actually took place.

Enable QoS on the server

If the QoS server does not start, the first thing to check is whether QoS is enabled on the server. When you configure your policies for the first time, the Initial Configuration wizard automatically enables QoS on the server. However, if this value has been changed for any reason, the server will not start.

To verify that QoS is enabled on the server, follow these steps:

In iSeries™ Navigator, expand your server > Network > IP Policies.
Right-click Quality of service and select Configuration.
When the QoS interface appears, right-click QoS and select Properties.
On the QoS properties page, verify that Enable QoS is selected.

Journal QoS policies
Quality of service (QoS) includes a journaling function. Journaling allows you to track QoS policy actions, such as when a policy was added, removed, or changed.
Log QoS server jobs
When you encounter problems with your quality of service (QoS) policies, analyze the iSeries server job logs. The job log contains error messages and other information related to QoS.
Monitor server transactions
With the quality of service (QoS) monitor, you can verify that the QoS policies are working as you intend them to work.
Trace TCP applications
You can use the quality of service (QoS) trace to work with trace functions and to view the current trace buffer.

Parent topic: Quality of service

Related concepts

Communications trace

Related tasks

Order QoS policies