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THREAD: Duplicate IPv6 address

philippeL
Associate

Dear ST Support Team,

I am using STM32WB55 with firmware stm32wb5x_BLE_Thread_dynamic_fw.bin release V1.23 and application based on samples in STM32CubeFW. I flashed two devices and set both devices:

  • OT_LinkMode.mRxOnWhenIdle = 1U;
  • OT_LinkMode.mDeviceType = 1U;
  • OT_LinkMode.mNetworkData = 1U;

and coap capabilities.

I noticed the following behaviour:

Device1:

  • EUI-64: 76:1A:D6:A4:98:A7:2C:70
  • Preferred IPv6: fdeb:6e2:6135:d326:0:ff:fe00:5c00
  • Preferred IPv6: fdeb:6e2:6135:d326:23d4:335f:27aa:3a48
  • Preferred IPv6: fe80:0:0:0:741a:d6a4:98a7:2c70
  • RLOC16: 0x5c00

Device2:

  • EUI-64: 76:1A:D6:A4:98:A7:2C:70
  • Preferred IPv6: fdeb:6e2:6135:d326:0:ff:fe00:5402
  • Preferred IPv6: fdeb:6e2:6135:d326:23d4:335f:27aa:3a48
  • Preferred IPv6: fe80:0:0:0:741a:d6a4:98a7:2c70
  • RLOC16: 0x5402

Both devices have the same extAddr and same IPv6! (eui-64 read thanks otLinkGetExtendedAddress(...) ).

If I use otLinkSetExtendedAddress(...) with extAdrr coming from reading at @UID64_BASE (according to user manual Flash 64 section) I've got:

Device1:

  • EUI-64: 1B:62:79:02:26:E1:80:00
  • Preferred IPv6: fdeb:6e2:6135:d326:0:ff:fe00:a000
  • Preferred IPv6: fdeb:6e2:6135:d326:23d4:335f:27aa:3a48
  • Preferred IPv6: fe80:0:0:0:1962:7902:26e1:8000
  • RLOC16: 0xa000

 

Device2:

  • EUI-64: EB:A9:CC:01:26:E1:80:00
  • Preferred IPv6: fdeb:6e2:6135:d326:0:ff:fe00:c002
  • Preferred IPv6: fdeb:6e2:6135:d326:23d4:335f:27aa:3a48
  • Preferred IPv6: fe80:0:0:0:e9a9:cc01:26e1:8000
  • RLOC16: 0xc002

They still have the same IP address: fdeb:6e2:6135:d326:23d4:335f:27aa:3a48!

Any idea where I have to look for to avoid such behaviour? Because right now devices are only able to react on put/post multicast coap messages.

 

Thanks in advance.

Kind regards.

Philippe.

 

 

 

 

 

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