Synchronization issue between PC, Jetson TX2 and Jetson Orin NX (Ethernet + Wi-Fi setup)

[hyakoubi.univ]

Hello,

We are currently working on a multi-Jetson setup and facing synchronization issues between a Jetson TX2 and a Jetson Orin NX.(RC1220 battery used).
Here is our configuration:

• Both Jetsons are connected directly via Ethernet (RJ45) with static IP addresses for inter-board communication.

• Each Jetson also has a Wi-Fi connection to the same local network as our host PC

The Ethernet link is dedicated to data exchange and time synchronization between the two Jetsons.(using ROS2, Robot Operating Systems)

However, we are experiencing difficulties achieving consistent synchronization (e.g., using chrony, ptpd, or hardware timestamping).

Could anyone share best practices or a verified configuration for achieving accurate time synchronization between two Jetson devices (TX2 ↔ Orin NX) over a direct Ethernet link, while both are also connected to Wi-Fi?

Any guidance or configuration example would be greatly appreciated.

Thanks in advance,

[linuxdev]

I cannot answer that. I will suggest though that whenever it fails or misbehaves that you save the output of this on all machines related to this:

• ifconfig (or alternatively, ip -s addr)
• route (or alternatively, ip route show)

The main reason for this is to compare metrics (priorities) over various routes. Also you’d want to mention the address of any time source (routes and metrics combine in combination with specific addresses).