[asterisk-ss7] Sporadic SS7 Link Down

[Nyamul Hassan]

Hi,

This is mostly due to transmission related error.  Physical connectivity
issue.  In most cases, checking the cables, connectors, and et al upto the
remote switch, helps in getting rid of these errors.

Regards
HASSAN


On Sat, Jul 16, 2011 at 05:05, Val Appleyard <vappleyard at gmail.com> wrote:

> Hi people!
> I have DAHDI Version: 2.4.0 with Asterisk 1.6.2.13 and libss7 1.0.2.
> Sometimes the link was down and up (that is sporadic). The system doesn't
> have many calls even.
>
> Any suggestion?
> Is a problem of PSTN or is a problem with my digium?
>
> Thanks!
>
> Here is a debug result with the error....
>
>
>
>
> Len = 25 [ 8e 8d 16 81 83 09 02 00 21 f0 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5
> a5 a5 a5 a5 ]
> FSN: 13 FIB 1
> BSN: 14 BIB 1
> >[0] MSU
> [ 8e 8d 16 ]
>         Network Indicator: 2 Priority: 0 User Part: STD_TEST (1)
>         [ 81 ]
>         OPC 8 DPC 2435 SLS 0
>         [ 83 09 02 00 ]
>         H0: 1 H1: 2
>         [ 21 ]
>
> Len = 25 [ 8d 8f 16 b1 08 c0 60 02 11 f0 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5
> a5 a5 a5 a5 ]
> FSN: 15 FIB 1
> BSN: 13 BIB 1
> <[0] MSU
> [ 8d 8f 16 ]
>         Network Indicator: 2 Priority: 3 User Part: STD_TEST (1)
>         [ b1 ]
>         OPC 2435 DPC 8 SLS 0
>         [ 08 c0 60 02 ]
>         H0: 1 H1: 1
>         [ 11 ]
>
> Len = 25 [ 8f 8e 16 81 83 09 02 00 21 f0 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5
> a5 a5 a5 a5 ]
> FSN: 14 FIB 1
> BSN: 15 BIB 1
> >[0] MSU
> [ 8f 8e 16 ]
>         Network Indicator: 2 Priority: 0 User Part: STD_TEST (1)
>         [ 81 ]
>         OPC 8 DPC 2435 SLS 0
>         [ 83 09 02 00 ]
>         H0: 1 H1: 2
>         [ 21 ]
>
> Len = 4 [ 8e 90 01 03 ]
> FSN: 16 FIB 1
> BSN: 14 BIB 1
> <[0] LSSU SIOS
>
> *Link state change: INSERVICE -> IDLE*
> *Link state change: IDLE -> NOTALIGNED*
> *[Jul 15 18:24:45] WARNING[19341]: chan_dahdi.c:11634 ss7_linkset: MTP2
> link down (SLC 0)*
> Len = 4 [ ff ff 01 00 ]
> FSN: 127 FIB 1
> BSN: 127 BIB 1
> >[0] LSSU SIO
>
> Len = 4 [ ff ff 01 00 ]
> FSN: 127 FIB 1
> BSN: 127 BIB 1
> <[0] LSSU SIO
>
> *Link state change: NOTALIGNED -> ALIGNED*
> Len = 4 [ ff ff 01 02 ]
> FSN: 127 FIB 1
> BSN: 127 BIB 1
> >[0] LSSU SIE
>
> Len = 4 [ ff ff 01 01 ]
> FSN: 127 FIB 1
> BSN: 127 BIB 1
> <[0] LSSU SIN
>
> *Link state change: ALIGNED -> PROVING*
> *T4 expired!*
> *Link state change: PROVING -> ALIGNEDREADY*
> Len = 3 [ ff ff 00 ]
> FSN: 127 FIB 1
> BSN: 127 BIB 1
> >[0] FISU
>
> Len = 3 [ ff ff 00 ]
> FSN: 127 FIB 1
> BSN: 127 BIB 1
> <[0] FISU
>
> *Link state change: ALIGNEDREADY -> INSERVICE*
> MTP2 link up (SLC 0)
> Len = 20 [ ff 80 11 81 83 09 02 00 11 a0 32 35 36 34 32 38 36 32 38 38 ]
> FSN: 0 FIB 1
> BSN: 127 BIB 1
> >[0] MSU
> [ ff 80 11 ]
>         Network Indicator: 2 Priority: 0 User Part: STD_TEST (1)
>         [ 81 ]
>         OPC 8 DPC 2435 SLS 0
>         [ 83 09 02 00 ]
>         H0: 1 H1: 1
>         [ 11 ]
>
> Len = 25 [ 80 80 16 b1 08 c0 60 02 11 f0 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5
> a5 a5 a5 a5 ]
> FSN: 0 FIB 1
> BSN: 0 BIB 1
> <[0] MSU
> [ 80 80 16 ]
>         Network Indicator: 2 Priority: 3 User Part: STD_TEST (1)
>         [ b1 ]
>         OPC 2435 DPC 8 SLS 0
>         [ 08 c0 60 02 ]
>         H0: 1 H1: 1
>         [ 11 ]
>
> Len = 25 [ 80 81 16 81 83 09 02 00 21 f0 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5 a5
> a5 a5 a5 a5 ]
> FSN: 1 FIB 1
> BSN: 0 BIB 1
> >[0] MSU
> [ 80 81 16 ]
>         Network Indicator: 2 Priority: 0 User Part: STD_TEST (1)
>         [ 81 ]
>         OPC 8 DPC 2435 SLS 0
>         [ 83 09 02 00 ]
>         H0: 1 H1: 2
>         [ 21 ]
>
> Len = 20 [ 80 81 11 b1 08 c0 60 02 21 a0 32 35 36 34 32 38 36 32 38 38 ]
> FSN: 1 FIB 1
> BSN: 0 BIB 1
> <[0] MSU
> [ 80 81 11 ]
>         Network Indicator: 2 Priority: 3 User Part: STD_TEST (1)
>         [ b1 ]
>         OPC 2435 DPC 8 SLS 0
>         [ 08 c0 60 02 ]
>         H0: 1 H1: 2
>         [ 21 ]
>
>
>
>
> --
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