[asterisk-users] Suddenly "HDLC Bad FCS (8)" errors on ISDN-PRI, changed nothing

DLeese at LStelcom.com DLeese at LStelcom.com
Mon May 31 07:46:46 CDT 2010


Hi fellow asterisk users,

I am running Asterisk 1.4.29 with an Digium TE121 card (wcte12xp kernel
module) an approx. 100 snom320. The whole installation is running
without issues since 5 months.

Without having changed anything on the asterisk server for at least 2
months, i noticed "clicking sounds" at external calls over the PRI.
Asterisk constantly throws the following messages:

...
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:37] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
[May 31 14:03:38] NOTICE[4163]: chan_dahdi.c:9078 pri_dchannel: PRI got
event: HDLC Bad FCS (8) on Primary D-channel of span 1
...

At first (last week) there where only a few of these messages per
minute, but today their intervall inceased dramatically. The "clicking"
also increased.

Can this be caused by problems of the telco (Deutsche Telekom)? If so,
could anybody please provide some additional information about it? Does
anybody have any experiences with this issue?

For sake of completeness i have included the relevant .conf files, but i
highly doubt it's a configuration issue:

---

 cat /proc/interrupts
           CPU0       CPU1       CPU2       CPU3       CPU4       CPU5
CPU6       CPU7
  0:         63          0          0          0          0          0
0          1   IO-APIC-edge      timer
  1:          0          0          0          0          0          0
0          8   IO-APIC-edge      i8042
  6:          0          0          0          0          0          0
0          2   IO-APIC-edge      floppy
  7:          1          0          0          0          0          0
0          0   IO-APIC-edge
  8:          0          0          0          0          0          0
0         19   IO-APIC-edge      rtc0
  9:          0          0          0          0          0          0
0          0   IO-APIC-fasteoi   acpi
 12:          0          0          0          0          0          0
0        105   IO-APIC-edge      i8042
 14:          0          0          0          0          0          0
0         76   IO-APIC-edge      ide0
 18:          0          0          1       2922          0        150
648815  506811268   IO-APIC-fasteoi   wcte12xp0
 19:          0          0          0        153          0          7
4563     285489   IO-APIC-fasteoi   arcmsr
 20:          0          0          0          0          0          0
0          0   IO-APIC-fasteoi   sata_nv
 21:          0          0          0          0          0          0
0          0   IO-APIC-fasteoi   sata_nv
 22:          0          0          0          0          0          0
0          0   IO-APIC-fasteoi   ohci_hcd:usb2
 23:          0          0          0          0          0          0
0          1   IO-APIC-fasteoi   ehci_hcd:usb1, sata_nv
219:          0          0          0         86          0        371
2576954   97457996   PCI-MSI-edge      eth0
220:          0          0          0          0          0          0
0          0   PCI-MSI-edge      aerdrv
221:          0          0          0          0          0          0
0          0   PCI-MSI-edge      aerdrv
222:          0          0          0          0          0          0
0          0   PCI-MSI-edge      aerdrv
223:          0          0          0          0          0          0
0          0   PCI-MSI-edge      aerdrv
NMI:          0          0          0          0          0          0
0          0   Non-maskable interrupts
LOC:   11726262    1551452    1834726    1534833    2262834    1499777
4073035   39704316   Local timer interrupts
RES:     858017     180201     132730     205234     129387     128549
688861     667641   Rescheduling interrupts
CAL:        166        206        221        214        208        213
187        126   function call interrupts
TLB:      13298       4915       2847       3680      10646       1067
14320       9156   TLB shootdowns
TRM:          0          0          0          0          0          0
0          0   Thermal event interrupts
SPU:          0          0          0          0          0          0
0          0   Spurious interrupts
ERR:          1
MIS:          0

---

cat /etc/dahdi/system.conf:

# Autogenerated by /usr/sbin/dahdi_genconf on Wed Nov  4 13:37:30 2009
# If you edit this file and execute /usr/sbin/dahdi_genconf again,
# your manual changes will be LOST.
# Dahdi Configuration File
#
# This file is parsed by the Dahdi Configurator, dahdi_cfg
#
# Span 1: WCT1/0 "Wildcard TE121 Card 0" (MASTER)
span=1,1,0,ccs,hdb3,crc4
# termtype: te
bchan=1-15,17-31
dchan=16
echocanceller=mg2,1-15,17-31
# echocanceller=no

# Global data

loadzone        = de
defaultzone     = de

---

 cat /etc/asterisk/dahdi-channels.conf:

; Autogenerated by /usr/sbin/dahdi_genconf on Wed Nov  4 13:37:30 2009
; If you edit this file and execute /usr/sbin/dahdi_genconf again,
; your manual changes will be LOST.
; Dahdi Channels Configurations (chan_dahdi.conf)
;
; This is not intended to be a complete chan_dahdi.conf. Rather, it is
intended
; to be #include-d by /etc/chan_dahdi.conf that will include the global
settings
;

; Span 1: WCT1/0 "Wildcard TE121 Card 0" (MASTER)
immediate=no
callprogess=yes
;busydetect=yes
busydetect=no
context=from-pstn
switchtype=euroisdn
signalling=pri_cpe
group=0
channel => 1-15,17-31

---

Regards

Daniel Leese



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