Why peak rate is higher than partition size?

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Article ID: 167621

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Updated On:

Products

PacketShaper

Issue/Introduction

The reason that you might be seeing the Peak traffic is higher than the max partition size was because partitions do not calculate and account for SYN packets, therefore if a large number of SYNs is seen for this class, it could cause a partition burst over its allowed limit. 

However, if you would like for the SYN packets to be enforced by the partition size, you can issue the command " sys set tcpSynControl 1 ".
This is a system setting variable that basically enforces the SYNs to be included in the partition calculation and preventing the partition from bursting over it's configured limit.

An example as shown below:

PacketShaper# sys set tcpSynControl 1

Warning: This system command may impact the unit's operation.
        Modifying its default value or setting should be done only
        under the guidance of Packeteer Customer Support.

PacketShaper# sys set tcpSynControl

System values                   Current   Default   Min       Max
=========================================================================
tcpSynControl                   1         0         0         1

Warning: This system command may impact the unit's operation.
        Modifying its default value or setting should be done only
        under the guidance of Packeteer Customer Support.