[srslte-users] UL NAS: Authentication Failure MAC code failure

[Andrea Valori]

Hello everyone,
I am puzzled by the issue below, where the SIM seems not authenticated.
I successfully authenticated some Sysmocom SIMs in the past, but now, doing
apparently exactly the same thing (although with a newer version of both
pysim and SRS) no.
The older programmed SIMs still work…
Any help? I checked 100s of time Ki and Op in the users_db… Thanks.

Initial UE message: LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST

Received Initial UE message -- Attach Request

Attach request -- IMSI: 901700000044986

Attach request -- eNB-UE S1AP Id: 1

Attach request -- Attach type: 2

Attach Request -- UE Network Capabilities EEA: 11100000

Attach Request -- UE Network Capabilities EIA: 01100000

Attach Request -- MS Network Capabilities Present: true

PDN Connectivity Request -- EPS Bearer Identity requested: 0

PDN Connectivity Request -- Procedure Transaction Id: 1

PDN Connectivity Request -- ESM Information Transfer requested: true

Downlink NAS: Sending Authentication Request

UL NAS: Authentication Failure

MAC code failure
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