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Bug #5131

closed

Call setup failing on 3rd SETUP

Added by keith 7 months ago. Updated about 2 months ago.

Status:
Resolved
Priority:
Normal
Assignee:
-
Target version:
-
Start date:
04/26/2021
Due date:
% Done:

0%

Spec Reference:

Description

Attempting to establish a 3rd simultaneous call causes all calls to drop no further calls can be established until the MGW is restarted.
100% reproducible.

This is the oddity in the osmo-mgw logs

Apr 26 00:34:50 test2-bsc osmo-mgw[2313]: DLMGCP mgcp_protocol.c:751 endpoint:ds/e1-0/s-2/su16-6@mgw CRCX: creating new connection ...
Apr 26 00:34:50 test2-bsc osmo-mgw[2313]: DLINP input/e1d.c:350 E1L(0) Line update 0 0=E1D(0:0) 32
Apr 26 00:34:50 test2-bsc osmo-mgw[2313]: DLINP input/e1d.c:450 E1TS(0:3) Could not open timeslot 3
Apr 26 00:34:50 test2-bsc osmo-mgw[2313]: DE1 mgcp_e1.c:400 trunk:0 failed to update E1 timeslot 2.


After this, restart is required.

At the same time. osmo-e1d logs:

20210426003450977 DE1D ERROR (I0:L0:T3) Timeslot already open, rejecting re-open without F_FORCE (ctl.c:380)
20210426003450979 DE1D ERROR (I0:L0:T3) dead socket during write: Broken pipe (mux_demux.c:298)

Attached logs and pcaps did not necessarily start and end at the same time, but all timestamps should match.


Files

e1.pcap e1.pcap 329 KB contains various call setup attempts keith, 04/26/2021 05:29 AM
lo.pcap lo.pcap 32.9 MB all traffic on lo , sctp, mgcp, sip, etc.. keith, 04/26/2021 05:33 AM
osmo-bsc.cfg osmo-bsc.cfg 4.45 KB keith, 04/26/2021 05:37 AM
osmo-mgw.cfg osmo-mgw.cfg 1.21 KB keith, 04/26/2021 05:37 AM
osmo-msc.cfg osmo-msc.cfg 2.21 KB keith, 04/26/2021 05:37 AM
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