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Large delay for sending the SRP registration response #3442

Description

@doru91

I am using this OTBR Docker image together with an NRF52840 dongle. OTBR Docker runs on rpi5 (standard Matter Test Harness configuration).

During Matter commissioning (see attached ss and attached zip file containing the corresponding pcap), the device attaches to the Thread Network and executes 2 SRP registrations:

  • reply (packet 19) for the first query ( packet 17) is generated immediately (< 1ms)
  • reply (packet 37) for the second query (packet 35) is generated in more than>700ms (this reproduces all the times)

Is this expected? If not do you have some pointers on how to investigate it (for example I don't know exactly how to regenerate the Docker image so some instructions around this would be very helpful)?

Image

air_capture.zip

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