Eagle forwarding the segmented messages to HLR in reverse order

Asset ID:	1-72-2214408.1
Update Date:	2016-12-22
Keywords:

Solution Type Problem Resolution Sure

Solution 2214408.1 : Eagle forwarding the segmented messages to HLR in reverse order

Applies to:

Oracle Communications EAGLE (Hardware) - Version EAGLE 46.0 and later
Information in this document applies to any platform.

Symptoms

On : EAGLE 46.0 version, Eagle 5 - STP Production

Problem Summary:
----------------------------
The STP receives a collection of XUDTs (segmented SCCP messages) from MSC/VLR and then forwards to HLR in reverse order.

MSC/VLR -> STP:

Segmentation
1... .... = Segmentation: First: First segment (0x1)
.0.. .... = Segmentation: Class: Class 0 selected (0x0)
.... 0001 = Segmentation: Remaining: 0x1
Segmentation: Source Local Reference: 0x040008
Segmentation
0... .... = Segmentation: First: Not first segment (0x0)
.0.. .... = Segmentation: Class: Class 0 selected (0x0)
.... 0000 = Segmentation: Remaining: 0x0
Segmentation: Source Local Reference: 0x040008

From STP -> HLR

Segmentation
0... .... = Segmentation: First: Not first segment (0x0)
.0.. .... = Segmentation: Class: Class 0 selected (0x0)
.... 0000 = Segmentation: Remaining: 0x0
Segmentation: Source Local Reference: 0x040008
Segmentation
1... .... = Segmentation: First: First segment (0x1)
.0.. .... = Segmentation: Class: Class 0 selected (0x0)
.... 0001 = Segmentation: Remaining: 0x1
Segmentation: Source Local Reference: 0x040008

Cause

From Eagle configuration class1seq was not enabled.

  SCCP OPTIONS
  -------------------------------
  CLASS1SEQ off
  CCLEN 0
  ACLEN 0
  INTLUNKNNAI no
  SUBDFRN off
  DFLTGTTMODE CdPA
  MTPRGTT off
  MTPRGTTFALLBK mtproute
  UNQGTTSEL bestmatch
  DELCCPREFIX pfxwcc
  GTTDIST all

Solution

Class1seq needs to be enabled in order to guaranty In-sequence delivery.

To Enable class1seq:
    chg-sccpopts:class1seq=on
To Disable Class1seq:
    chg-sccpopts:class1seq=off
Verify SCCP option table for parameter changes.
     rtrv-sccpopts

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