SCTP Congested and Dropping Outbound Packet

SCTP Congested and Dropping Outbound Packet (Doc ID 1243394.1)

Last updated on OCTOBER 18, 2016

Applies to:

Oracle Communications Network Charging and Control - Version 2.2.0 and later
Information in this document applies to any platform.

Symptoms

1. Service Logic Controller (SLC) slow in responding with the following type of symptoms:

Attempting to login to the platform and execute any command (ls, df, ps, etc) may result in the entire session freezing; lack of platform response.
Server fails to reboot via command, need hard reset to reboot the server.

2. Signalling gateway point of view during SLC problem: SIGTRAN connection to the SLC as being inactive/down.

3. SIGTRAN log on SLC reports errors following congestion errors in the /IN/service_packages/SLEE/tmp/SIGTRAN.log:

Jun 24 12:01:07.000305 sua_if(5333) WARNING: {401004} sctp:xxxx.xxxx.xxxx.xxxx:yy:XXXX.XXXX.XXXX.XXXX:YY:Congested; dropping outbound packet

Occurrence of these errors may have significantly increased compared with previous days.

Take Sun Explorer and memory check regarding server hang and raise problem with Oracle Sun. Refer to <Note 1018748.1> on how to run Sun Explorer.

Sun Explorer analysis feedback from Sun:

Cause

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Applies to:

Symptoms

Cause

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