That reminds me of a time, many years ago, when we upgraded a from hubs to switches in the design office. All of a sudden all the HP Unix workstations started

That reminds me of a time, many years ago, when we upgraded a from hubs to switches in the design office. All of a sudden all the HP Unix workstations started to misbehave. It turned out that NFS needed the immediate back pressure caused by collisions on the Ethernet. The switches had a buffer for each port so there was no back pressure until too late and NFS would report that packets were lost. We put the hubs back and all was well,