UES IP is an scalable and highly-optimized Ethernet Switch implementable on Xilinx families FPGAs. The switching structure is based on a full-crossbar interconection matrix between the ports. This approach ensures wire-speed frame processing and a very low latency times. The IP can include the support of optional features like IEEE 1588 Transparent Clock or Jumbo Frames.
More information at
https://soc-e.com/products/reliable-ethernet/unmanagedethernet-switch-ip-core