Hi Mikrotik support
"crs317 - improved transmit performance between 10G and 1G ports"
^^ this is a line from the changelog starting from 6.42rc6 and 6.41.1.
Are you prepared to provide any more detail on this issue, please? In other words, what symptoms were there that needed to be fixed?
Reason for asking is that we have a poorly performing 1G link from a CRS317. It is fast (line rate) when the CRS receives data, but slow (circa 250mbps) when transmitting. It runs 6.41rc38*. Is this poor performance likely to be caused by the same problem you fixed?
*I wouldn't usually put an RC version into production, but it seems the CRS317 was released without VLAN switching support and the only way to get it (in hardware, not using a software bridge) at the time was to run the RC version.