lchan broken unusable activation timeout

[Keith]

On 17/08/2016 23:35, Holger Freyther wrote:
>> OpenBSC# show lchan su
>> BTS 0, TRX 0, Timeslot 1, Lchan 0, Type NONE - L1 MS Power: 33 dBm
> type none? What OpenBSC version is that? So just the none already looks broken.
Sure, If you look at the non summary version of lchan, you see the likes of
BTS 1, TRX 0, Timeslot 7, Lchan 0: Type NONE
  Connection: 0, State: BROKEN UNUSABLE Error reason: activation timeout
  BS Power: 37 dBm, MS Power: 33 dBm
  No Subscriber
  Bound IP: 0.0.0.0 Port 0 RTP_TYPE2=0 CONN_ID=0
  Measurement Report:
    Flags: DLinval
    RXL-FULL-ul: -110 dBm, RXL-SUB-ul: -110 dBm RXQ-FULL-ul: 0,
RXQ-SUB-ul: 0
osmo-nitb tells me it is
OpenBSC version 0.14.0-dirty

You mentioned off list about the sbts2050 software, yes I'm afraid it's
201208-testing.
>> Can I ask, What triggers the eventual calling of
>> rsl_rx_rf_chan_rel_ack(), 
> the actual arrival of the REL_ACK message.
So it won't ever be called, once it's "lost"
What I don't understand is how it can get lost. Or arrive out of order
of something, that's not possible with tcp is it?
I have tried momentarily interrupting the connection BSC<->BTS with
iptables but I cannot as yet provoke the event that causes this.. ah
just now it happens again (meanwhile I am watching a straight ping to
the bts (for what it's worth) and I see nothing unusual there.
Maybe this actually has not got to do with the wifi link after all, and
that is just coincidence?

<0004> abis_rsl.c:717 (bts=0,trx=0,ts=1,ss=0) RF CHANNEL RELEASE ACK
<0004> abis_rsl.c:735 (bts=0,trx=0,ts=1,ss=0) CHAN REL ACK for broken
channel. Releasing it.
<0004> abis_rsl.c:211 (bts=1,trx=0,ts=1,ss=1) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=1,trx=0,ts=1,ss=0) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=1,trx=0,ts=1,ss=2) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=1,trx=0,ts=1,ss=3) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=1,trx=0,ts=1,ss=4) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:1464 (bts=1,trx=0,ts=1,ss=5) Activating ARFCN(251)
SS(5) lctype SDCCH r=LOCATION_UPDATE ra=0x0b ta=3
<0004> abis_rsl.c:1464 (bts=1,trx=0,ts=1,ss=6) Activating ARFCN(251)
SS(6) lctype SDCCH r=LOCATION_UPDATE ra=0x0f ta=3
<0004> abis_rsl.c:1464 (bts=1,trx=0,ts=1,ss=7) Activating ARFCN(251)
SS(7) lctype SDCCH r=LOCATION_UPDATE ra=0x0a ta=3
<0004> abis_rsl.c:1464 (bts=0,trx=0,ts=1,ss=0) Activating ARFCN(249)
SS(0) lctype SDCCH r=LOCATION_UPDATE ra=0x0c ta=2
<0004> abis_rsl.c:1464 (bts=0,trx=0,ts=1,ss=1) Activating ARFCN(249)
SS(1) lctype SDCCH r=OTHER ra=0x1c ta=1
<0004> abis_rsl.c:1464 (bts=0,trx=0,ts=1,ss=2) Activating ARFCN(249)
SS(2) lctype SDCCH r=LOCATION_UPDATE ra=0x0d ta=2
<0004> abis_rsl.c:1464 (bts=0,trx=0,ts=1,ss=3) Activating ARFCN(249)
SS(3) lctype SDCCH r=OTHER ra=0x10 ta=1
<0004> abis_rsl.c:1464 (bts=0,trx=0,ts=1,ss=4) Activating ARFCN(249)
SS(4) lctype SDCCH r=LOCATION_UPDATE ra=0x07 ta=2
<0004> abis_rsl.c:1464 (bts=0,trx=0,ts=1,ss=5) Activating ARFCN(249)
SS(5) lctype SDCCH r=OTHER ra=0x17 ta=1
<0004> abis_rsl.c:211 (bts=1,trx=0,ts=1,ss=5) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=1,trx=0,ts=1,ss=6) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=1,trx=0,ts=1,ss=7) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=0,trx=0,ts=1,ss=0) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=0,trx=0,ts=1,ss=1) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=0,trx=0,ts=1,ss=2) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=0,trx=0,ts=1,ss=3) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=0,trx=0,ts=1,ss=4) Timeout during activation.
Marked as broken.
<0004> abis_rsl.c:211 (bts=0,trx=0,ts=1,ss=5) Timeout during activation.
Marked as broken.