Warnins printed in Terminal

Matthias Alleman

unread,

Jul 8, 2021, 5:23:04 AM7/8/21

to openthread-users

Hi, I am getting a lot of warnings at runtime, do I have to be concerned about some of them? Am I the only one getting these warnings?

This one occurs quite often

<wrn> net_openthread: [WARN]-MLE-----: Failed to process UDP: Security

This one occurs when another devices tries to join the network

<wrn> net_openthread: [WARN]-MLE-----: Failed to process Discovery Request: Security

This warning occurs randomly

<wrn> net_openthread: [WARN]-MLE-----: Failed to process Advertisement: NoRoute

Jonathan Hui

unread,

Jul 8, 2021, 1:54:36 PM7/8/21

to Matthias Alleman, openthread-users

These warnings could be expected depending on your scenario.

On Thu, Jul 8, 2021 at 2:23 AM Matthias Alleman <matthias...@hotmail.com> wrote:

This one occurs quite often

<wrn> net_openthread: [WARN]-MLE-----: Failed to process UDP: Security

This occurs when there are other neighboring devices that have different Thread network credentials.

This one occurs when another devices tries to join the network

<wrn> net_openthread: [WARN]-MLE-----: Failed to process Discovery Request: Security

This occurs when the Thread network does not have commissioning enabled and a device is trying to join the network.

This warning occurs randomly

<wrn> net_openthread: [WARN]-MLE-----: Failed to process Advertisement: NoRoute

This occurs when a child receives an MLE Advertisement from what it thought was its parent, but is no longer its parent.

Hope that helps.

--

Jonathan Hui

Matthias Alleman

unread,

Jul 12, 2021, 8:13:31 AM7/12/21

to openthread-users

Thank you for your reply. Concerning the first warning: " Failed to process UDP: Security".
Our setup consists of 2 Openthread networks that exist next to each other, both on a different channel but with the same commissioner credential.
Is it expected to throw the warning in this situation, or can we resolve this warning in some way?

Thank you

Op donderdag 8 juli 2021 om 19:54:36 UTC+2 schreef Jonathan Hui:

Jonathan Hui

unread,

Jul 13, 2021, 5:26:51 PM7/13/21

to Matthias Alleman, openthread-users

The warning message is expected in this case.

Thread sends MLE Announce messages periodically on different channels to synchronize on the channel. MLE messages are secured with the network key. Neighboring devices in a different Thread network will receive the MLE message, but the security check will fail due to mismatch of the network key.

--

Jonathan Hui

--
You received this message because you are subscribed to the Google Groups "openthread-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to openthread-use...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/openthread-users/3637cb92-e89a-49ff-8114-921106a33f3dn%40googlegroups.com.

Matthias Alleman

unread,

Aug 3, 2021, 4:02:59 AM8/3/21

to openthread-users

Thank you for your explanation. However sometimes the join procedure hangs while printing a lot of the following messages:

<wrn> net_openthread: [WARN]-MLE-----: Failed to process UDP: InvalidState

I see that the joiner state changes from discover to connect but seems stuck then. When I reboot the device, the join procedure completes without problems.