On Fri, Jan 10, 2020 at 06:51:39PM +0800, wangqi wrote: > Dear experts, > > Because of a project, we need to use ROCE to send data from > > region A to region B. A and B are not in a same LAN, and it will > > go through NAT (Network Address Translation). However, we found > > that we can't send data successfully. We do some investigations > > and find that in an INTEL ppt, it says because "ICRC doesn't allow > > IP header modifications", ROCE protocol can't work with NAT > > while iWARP can work with NAT. We want to ask a few questions. > > 1. Can ROCE protocol work with NAT? Is the INTEL ppt right? I have no idea to which "INTEL ppt" you are referring, but RoCEv2 is an extension of RoCEv1 to support routing over different subnets. Instead of IB GRH field in RoCEv1 packets, RoCEv2 uses IP and UDP headers. > > 2. Is there any method that we can use to make ROCE work with > > NAT? For example, can we modify or remove the ICRC part in the > > ROCE protocol? Is it a good idea?a Use proper hardware that supports RoCEv2. > > Best wishes, > > Qi > >
