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Bug #5856

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Very annoying "this BTS model does not support TSC 7 != BSIC-BCC 0" error.

Added by keith 19 days ago. Updated 19 days ago.

Status:
New
Priority:
Normal
Assignee:
Target version:
-
Start date:
01/15/2023
Due date:
% Done:

0%

Spec Reference:

Description

Since some months ago, when connecting osmo-bts-sysmo to a remote osmo-bsc that is not directly on the LAN, (and very occasionally on the LAN), but rather on some higher latency link, I am often seeing

common/oml.c:991 OC=CHANNEL INST=(00,00,00): SET CHAN ATTR: this BTS model does not support TSC 7 != BSIC-BCC 0

Seemingly because in the OML bringup we are sending Set CHAN attrs before we have sent Set BTS attrs

I don't know what controls this sequence, but maybe it would be good if that were a little more robust.


Files

happy_bringup.pcap happy_bringup.pcap 21 KB keith, 01/14/2023 11:25 PM
sad_bringup.pcap sad_bringup.pcap 6.08 KB keith, 01/14/2023 11:25 PM
bsic_0.pcap bsic_0.pcap 39.2 KB keith, 01/14/2023 11:48 PM
Actions #1

Updated by keith 19 days ago

It might be of help to observe what happens if the TSC is set to 0 so that the OML bring up is not terminated, eventually we do send the set BTS attr. See bsic_0.cap

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