Hello list,
I have a really big problem with the loss of my MTP-link because of CRC
errors. I constantly see messages like:
Jul 3 13:46:06 NOTICE[18867]: mtp.c:1496 mtp_thread_main: Full Zaptel
input buffer detected, incoming packets may have been lost on link 'l1'.
Jul 3 13:46:06 NOTICE[18867]: mtp.c:1543 mtp_thread_main: Empty Zaptel
output buffer detected, outgoing packets may have been lost on link 'l1'.
Jul 3 13:46:06 NOTICE[18867]: mtp.c:1227 mtp2_read_su: MTP2 CRC error
(CRC=0xba93 != 0xf0b8) on link 'l1'.
Jul 3 13:46:06 NOTICE[18867]: mtp.c:1442 mtp_thread_main: Excessive
poll delay 57756!
Jul 3 13:46:06 NOTICE[18867]: mtp.c:1496 mtp_thread_main: Full Zaptel
input buffer detected, incoming packets may have been lost on link 'l1'.
Jul 3 13:46:06 NOTICE[18867]: mtp.c:1543 mtp_thread_main: Empty Zaptel
output buffer detected, outgoing packets may have been lost on link 'l1'.
Jul 3 13:46:06 NOTICE[18867]: mtp.c:1227 mtp2_read_su: MTP2 CRC error
(CRC=0x9b7c != 0xf0b8) on link 'l1'.
And on the other side of the SS7 link on an Alcatel switch there are
CRC16 messages logged. I also see
Jul 3 13:45:42 WARNING[18867]: chan_ss7.c:3598 monitor_main: MTP is now
DOWN on link 'l1'.
Jul 3 13:45:47 WARNING[18867]: chan_ss7.c:3594 monitor_main: MTP is now
UP on link 'l1'.
Jul 3 13:45:47 WARNING[18867]: chan_ss7.c:3601 monitor_main: MTP is now
INSERVICE for linkset 'siuc'.
This makes the connection very unreliable.
Any idea how to solve this problem?
My system/kernel is:
Linux ss7-gate 2.6.8-3-686-smp #1 SMP Thu Feb 9 07:05:39 UTC 2006 i686
GNU/Linux
debian kernel package.
ss7-gate:~# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 3
cpu MHz : 3012.221
cache size : 2048 KB
physical id : 0
siblings : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
pni monitor ds_cpl tm2 cid
bogomips : 5947.39
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 3
cpu MHz : 3012.221
cache size : 2048 KB
physical id : 0
siblings : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
pni monitor ds_cpl tm2 cid
bogomips : 6012.92
ss7-gate:~# free
total used free shared buffers cached
Mem: 1035724 1029592 6132 0 82176 866152
-/+ buffers/cache: 81264 954460
Swap: 979956 0 979956
ss7-gate:~# cat /proc/interrupts
CPU0 CPU1
0: 981039926 0 IO-APIC-edge timer
1: 1649 0 IO-APIC-edge i8042
7: 2 0 IO-APIC-edge parport0
9: 0 0 IO-APIC-level acpi
14: 180901833 345 IO-APIC-edge ide0
50: 0 0 PCI-MSI pciehp
177: 0 0 IO-APIC-level uhci_hcd
185: 0 0 IO-APIC-level uhci_hcd, ehci_hcd
193: 980184484 0 IO-APIC-level uhci_hcd, wct2xxp
201: 0 0 IO-APIC-level uhci_hcd
209: 2637787 0 IO-APIC-level eth1
225: 23187346 0 IO-APIC-level eth0
NMI: 0 0
LOC: 981005852 981005848
ERR: 0
MIS: 0
Regards,
Kai
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