On Wed, Mar 18, 2020 at 03:57:33PM -0700, Dimitris Dimitropoulos wrote: > Hi, > > In RoCE v2 there various options for the protocol packet size: 4096, > 2048, etc. To what does this number refer to exactly. Is it the > payload that ends up in the QP buffers, or does it include headers > some of the headers as well ? If I'm looking on the correct RoCE spec section (A17.3.1.2.3 PAYLOAD LENGTH). It doesn't include headers but does include ICRC. The section "5.2.13 PAYLOAD" in the IBTA spec says that: "C5-8: All packets of an IBA message that contain a payload shall fill the payload to the full path MTU except the last (or only) packet of the message." This is why headers aren't included. Thanks > > Thank you. > > Dimitris
