Why am I seeing huge packet loss when a SpeedFlex test is run over Internet?

Summary

This article explains the reason for high packet in SpeedFlex results when test is run across the Internet and a workaround.

Question

Why am I seeing huge packet loss when a SpeedFlex test is run over Internet?

Customer Environment

Wireless network involving Ruckus APs.

Root Cause

SpeedFlex by default sends a burst of 50 UDP packets at each instance. All intermediate network components may not be capable of handling such huge bursts. So they will tend to drop which will result in packet loss.

Troubleshooting Steps

High packet loss typically arises if the source and destination are connected across Internet (for example, AP and ZoneDirector). Other possible causes can easily be eliminated by running SpeedFlex test on the same subnet.

Workaround

1. Use a TCP test instead of a UDP test.
2. Use CLI based ZAP test instead of GUI based SpeedFlex. This will let you control the burst size to a lower value.

Article Number:
000003944

Updated:
January 19, 2015 07:52 AM (almost 7 years ago)

Tags:
Performance, Known Issues and Workarounds, ZoneDirector, ZoneFlex Indoor, ZoneFlex Outdoor

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