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Bug #4867

open

Cinterion BGS2T failing to attach (no Attach Complete ever sent)

Added by pespin over 3 years ago. Updated over 3 years ago.

Status:
Stalled
Priority:
Normal
Assignee:
Target version:
-
Start date:
11/24/2020
Due date:
% Done:

0%

Spec Reference:

Description

AT+CGDCONT=1,"IP","internet" 
AT+CGATT=1

using osmocom network master with osmo-bts-trx-uhd + osmo-pcu

I see Attach procedure going on until GPRS Attach Accept is sent to the MS, then the MS never answers to it with a GPRS Attach Complete but still keeps interacting with the network ACKing all the DL data block (llc dummy frames) sent by the network, until it eventually tries to begin the whole GPRS Attach procedure again.

I attach a pcap file showing the issue.


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