Guidelines for Slow Site Connection

Scenario

One or more end users report experiencing slower-than-expected access to all applications (both within and outside the LAN).

Diagnosis

This section provides the essential information needed to diagnose the issue:

• Question: Is the application actually slower for this site?

  • Answer: Check the Application Performance Dashboard to confirm.

• Question: Does the slowdown occur for a specific application?

  • Answer: If yes, review Slow Application.

• Question: Does the slowdown occur for a specific server?

  • Answer: If yes, review Slow Server.

• Question: Have the client workstations been upgraded recently?

  • Answer: If yes, this may indicate a system-specific issue. Consider consulting the System Administrator for further details.

• Question: Have you recently upgraded your network equipment?

  • Answer: If yes, the issue may be related to the router or switch configuration. An in-depth review of the PV dashboards may be necessary. Navigate to Monitoring ▶ Performance Over Time Chart to investigate further.

• Question: Do the Retransmission Rate and Retransmission Delay fluctuate?

  • Answer: If yes, this could indicate a congestion issue. Check the router's load and other related factors.

Notes and Additional Considerations

A general slowdown in a client zone could be caused by a critical service, such as DNS. Review the DNS Response Time to identify any potential issues.

To investigate further, examine the Monitoring ▶ Bandwidth Chart for bandwidth variations and the number of TCP and UDP flows.

It’s possible that a QoS threshold has been exceeded, resulting in blocked new application requests. An indicator of this could be an increasing number of TCP RST packets. To confirm, navigate to the Analysis ▶ TCP Errors menu for deeper insights.