ONTAP responds with a TCP ACK when a client sends a SYN, and connection never gets established
Applies to
- Data ONTAP 7-Mode
- Clustered Data ONTAP
- ONTAP 9
- TCP and any top layer protocol that client may use such as: NFS, CIFS, ISCSI
Issue
- Client can't establish a new TCP session
- ONTAP responds to client's
SYN
with only anACK
- Client tore down a session, but the
FIN
never made it to the filer - Client is attempting to establish a new session using the same TCP source port from the previous connection