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[SBR/SIM] How to find if Signalware is dropping any response packets from HLR

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Article ID: KB17908 KB Last Updated: 04 Mar 2017Version: 2.0
Summary:

This article explains the procedure to check if there are any response packets from HLR being discarded by Signalware [SS7 stack] on the SBR/SIM server.

Symptoms:

When there are certain configuration mistakes, e.g. protocol mismatch between the Signalware [SS7 stack] and the HLR, there are chances that the Signalware stack may discard those response packets from the HLR. This procedure helps in identifying such a scenario [response packet discards].

Solution:

The response message from HLR is discarded silently when the protocol manager of Signalware receives a message for the wrong protocol.
This is done according to specifications.

There is an easy way to check if messages are being discarded:

  1. cd $OMNI_HOME/bin

  2. c7debug –ln <nodename>.   TCAP tcap_api delayed

  3. Under “TCAP Statistics”, check the line with “forward” and “dispose”:
  4. n_notice_ind=0, unknown_message=0
    forward=0, dispose=0
    forward: read=0, write=0, dispose=0, unknown=0

    If the “dispose=x” value is not zero, then that indicates that there are messages being discarded by the TCAP router.

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