Invalid value sn_ssr register

TCP/IP Chip W5300
1

Hi, I have a question about a TCP connection between two WIZNET W5300 chips.
When I force a connection close during a send operation, the sn_ssr(x) register returns the value 0x10 or 0x11 on the next reconnection.

This value is not present in the W5300 datasheet (sn_ssr register table).

Can you help me?

2

Do you forcefully close connection performing DISCON command first, and then CLOSE connection and reopen socket from the very beginning next time (with OPEN) command?