Hi Juliet,
Please find answers below:
1.Is the Socket error 9 the only socket error that you get ? yes this is the only socket error we are getting in smsp.log.
2.Were you able to identify with network traces from which IP (Agent does it comes from)? yes, we get web server IP in smps.log from which socket error is coming.
3.Any error in Agent webserver error_log ? there's no error in webagent error logs.
4.Do you have any network components that could reset connections between PS and Agent ? there's nothing configured like this.
Regards,
Shrawan