SCTP Data Size Limit in ns-3 DCE: Constant 17250 Bytes Observed in Wireshark

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I am conducting research on SCTP (Stream Control Transmission Protocol) using ns-3 and DCE.

I have edited and executed the standard sctp-server, sctp-client, and dce-sctp-simple examples, and I am visualizing the traffic using Wireshark.

A persistent issue I am encountering is that the total amount of data transferred does not increase beyond 17250 bytes, regardless of how much I increase the data size set in the simulation.

I am trying to understand the root cause of this limitation. Could you please provide some insight?

Possible factors I am considering are:

1. What is influencing this specific data size limit (17250 bytes)? Is this related to a default buffer size or a transport window limit within ns-3 or the DCE's kernel SCTP stack?

2. Could Wireshark be the cause, perhaps misinterpreting the SCTP packets or missing some traffic?

3. Am I misinterpreting the data shown in Wireshark or the statistics provided by the simulation?

Any guidance on what might be causing this hard limit, or suggestions on how to properly measure the total transferred data, would be greatly appreciated.

Thank you for your time and assistance.