@hailey @s0 Ah, and one more important thing: until v4 linuxptp released new versions only ever 4 years or so, which is why most distros have terribly old versions with a few annoying bugs. Make sure to use at least v4 (they release bi quarterly starting with v4 afaik, but I don't know how long it will take Debian to pick up the latest versions). Most convenient way is to build from source...