Technical Tip: 'No memory to create mbuf for simuser 75' error when running a UDP PPS performance test with IPv6

Description

This article describes an issue with running a UDP PPS performance test on FortiTester, using IPv6.

Scope

FortiTester, IPv6.

Solution

When trying to run a UDP PPS performance test using IPv6, the test fails with the message:

No memory to create mbuf for simuser 75

The flow value in this case is set to 150, but even if the flow value is set to 10, a similar error is seen:

No memory to create mbuf for simuser 5

A screenshot of the error is seen below:

And Running Result: No memory to create mbuf for simuser 5.

The issue is not seen for IPv4.

To mitigate this issue, the following option can be disabled:

The option 'Disable bidirectional traffic flow' can be found under UDP -> PPS -> Create New.

After the setting is disabled, the test is now successfully running for IPv6:

Running Result: The test has been finished successfully.