From a quick glance on the pcap files, I suspect the following:
- There is quite a bit of packet reordering of the data packets from 10.10.10.2 (Host B) to 10.10.10.1 (Host A).
- The reordered result in DUP-ACKs
- Due to the amount of reordering, there are tripple DUP-ACKs, resulting in fast-retranmissions
- The congestion window will be kept low when there are retransmissions, assuming there was packet-loss due to congestion
Are you able to capture on the WAN (EVPN) side of the routers?
