Strange LK-SCTP behavior in a multi-homing M3UA setup

Hi,


I have the following setup:
          - 1 M3UA ASP: with 2 IP addresses.
          - 2 M3UA SGP: each one with 4 IP addresses.


After launch, the ASP setups 4 associations: 2 with each SGP. Each
association is multihomed with 2 IP addresses in both sides.


The ASP sends traffic to the 2 SGP in a loadsharing configuration.


Normally, after associating the ASP should align with the 2 SGP with the
following procedure:

               SGP                             ASP1

                |                               |
                |<-------------ASP Up-----------|
                |-----------ASP Up Ack--------->|
                |                               |
                |<------- ASP Active(RCn)-------|  RC: Routing Context

                |-----ASP Active Ack (RCn)----->|      (optional)
                |                               |
                |-----NTFY(AS-ACTIVE)(RCn)----->|
                |                               |

The problem is that LK-SCTP is sending SHUTDOWN without ANY REASON sometimes
from ASP, sometimes from SGP1 and sometimes from SGP2. This behaviour
disturbs the whole execution process.


I have attached a wireshark capture for the ASP side.


I am using OpenSUSE 11.1 and lksctp-tools-1.0.9-1.28.


Can you please provide some help or hint to help me resolve this issue.


Thank you in advance.

--
Best Regards

Abdelkader Mosbah.

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