Hello all. I've been asked to look into an application performance issue. Certain procedures in app require SMB operations but there are instances where the app itself freezes for about 20 secs. The Windows PC itself isn't having a resource issue neither is the server so I thought check the network and that's where I see a lot of TCP retransmissions and other black packets in Wireshark.
I've sanitized and uploaded a capture. I'm hoping someone might help me understand the many TCP Dup Acks and Retransmissions. My switches don't show any errors on their interfaces or any signs of congestion that would point to packet loss so I can't see why there'd be retransmits. I'd appreciate any help offered.
https://www.cloudshark.org/captures/7023052d45d2
