[BUG] pair device failed because of network unreachable

[netscell]

Reproduction steps

pair device use ble or ip failed;
the mdns resolve target device ip start with fe8;:

07-27 11:59:55.241 26466 26774 I NsdServiceFinderAndResolver: Resolved service '40C0C36C1E4E2A47-0000000000000020' to /fe80::32de:4bff:fedb:8aa7
07-27 11:59:55.242 26466 26774 D DIS : ----- entry [0] : T 1
07-27 11:59:55.242 26466 26774 D DIS : ----- entry [1] : SAI 300
07-27 11:59:55.242 26466 26774 D DIS : ----- entry [2] : SII 5000
07-27 11:59:55.243 26466 26774 D DIS : Node ID resolved for 40C0C36C1E4E2A47:0000000000000020
07-27 11:59:55.243 26466 26774 D DIS : Hostname: fe80::32de:4bff:
07-27 11:59:55.243 26466 26774 D DIS : IP Address #1: fe80::32de:4bff:fedb:8aa7
07-27 11:59:55.243 26466 26774 D DIS : Port: 5540
07-27 11:59:55.243 26466 26774 D DIS : Mrp Interval idle: 5000 ms
07-27 11:59:55.243 26466 26774 D DIS : Mrp Interval active: 300 ms
07-27 11:59:55.243 26466 26774 D DIS : TCP Supported: 1
07-27 11:59:55.243 26466 26774 D DIS : UDP:[fe80::32de:4bff:fedb:8aa7]:5540: new best score: 3
07-27 11:59:55.243 26466 26774 D DIS : Checking node lookup status after 131 ms
07-27 11:59:55.243 26466 26774 D DIS : Keeping DNSSD lookup active
07-27 11:59:55.312 26466 26896 D DIS : Checking node lookup status after 11565 ms
07-27 11:59:55.312 26466 26896 D DIS : Checking node lookup status after 200 ms
07-27 11:59:55.312 26466 26896 D DIS : OperationalSessionSetup[1:0000000000000020]: Updating device address to UDP:[fe80::32de:4bff:fedb:8aa7]:5540 while in state 2
07-27 11:59:55.312 26466 26896 D DIS : OperationalSessionSetup[1:0000000000000020]: State change 2 --> 3
07-27 11:59:55.313 26466 26896 D IN : SecureSession[0x735aa99c08]: Allocated Type:2 LSID:15283
07-27 11:59:55.313 26466 26896 D SC : Initiating session on local FabricIndex 1 from 0x000000000000000D -> 0x0000000000000020
07-27 11:59:55.345 26466 26896 D TOO : KVS: Getting key f/1/g
07-27 11:59:55.345 26466 26896 D TOO : KVS: Getting key f/1/k/0
07-27 11:59:55.346 26466 26896 D TOO : KVS: Getting key f/1/s/0000000000000020
07-27 11:59:55.346 26466 26896 D KeyValueStoreManager: Key 'f/1/s/0000000000000020' not found in shared preferences
07-27 11:59:55.347 26466 26896 D EM : <<< [E:25882i S:0 M:169514501] (U) Msg TX to 0:0000000000000000 [0000] --- Type 0000:30 (SecureChannel:CASE_Sigma1)
07-27 11:59:55.347 26466 26896 D IN : (U) Sending msg 169514501 to IP address 'UDP:[fe80::32de:4bff:fedb:8aa7]:5540'
07-27 11:59:55.347 26466 26896 D IN : SecureSession[0x735aa99c08]: Released - Type:2 LSID:15283
07-27 11:59:55.348 26466 26896 D CTL : Device connection failed. Error ../../src/inet/UDPEndPointImplSockets.cpp:411: OS Error 0x02000065: Network is unreachable
07-27 11:59:55.348 26466 26896 D CTL : Error on commissioning step 'FindOperational': '../../src/inet/UDPEndPointImplSockets.cpp:411: OS Error 0x02000065: Network is unreachable'
07-27 11:59:55.348 26466 26896 E CTL : Failed to perform commissioning step 18
07-27 11:59:55.348 26466 26896 D CTL : Going from commissioning step 'FindOperational' with lastErr = '../../src/inet/UDPEndPointImplSockets.cpp:411: OS Error 0x02000065: Network is unreachable' -> 'Cleanup'
07-27 11:59:55.348 26466 26896 D CTL : Performing next commissioning step 'Cleanup' with completion status = '../../src/inet/UDPEndPointImplSockets.cpp:411: OS Error 0x02000065: Network is unreachable'
07-27 11:59:55.348 26466 26896 D CTL : Successfully finished commissioning step 'Cleanup'

Bug prevalence

3-7times a week

GitHub hash of the SDK that was being used

NA

Platform

android

Platform Version(s)

No response

Anything else?

No response

[bzbarsky-apple]

Sounds like the phone can't send a UDP message to fe80::32de:4bff:fedb:8aa7... This really depends on your networking setup, right?

[netscell]

the network which used phone ap and wifi router both have the unreachable problem;no extra setting for network;

[bzbarsky-apple]

Well, can the relevant device (the one trying to send the packet) ping the relevant IP? Because it looks like not....

[netscell]

ping the matter device using LLA （fe80::32de:4bff:fedb:8aa7 or fe80::32de:4bff:fedb:8aa7%wlan0） is ok in the same wifi；

[bzbarsky-apple]

@netscell Is that a ping from the phone involved?

[netscell]

yes,after failed,use ping tool android app from the same phone