Multicasting failed on "No status received (return code 1306)"

Hi All,

Recently my multicasting jobs failed on "No status received (return code 1306)". The port scanner has been used to test the necessary port 33354 on all failed clients and the results told "the port 33354 is open".

Not all of clients are failed. For example, in a specific subnet, 95% of clients are failed, however, in another subnet, only 10% are failed. Please anyone help to figure out how I can fix this.

I have 10,000 clients with 9.0 SP3 core server.

Thanks.

-Peter