I'm working on setting up an NFS file server using Fedora Core 4. The NFS shares will be accessed by compute nodes inside of a cluster computer. I've successfully done this in the past, but due to some recent hardware changes have run into a slight issue. The server (also head node of the cluster) has Gigabit network cards. 9 of the compute nodes (NFS Clients) do not, they have 10/100 nics. There are also 5 compute nodes that do have gigabit cards. The problem is this: When the nodes with gigabit cards mount an NFS share everything works fine. When the 10/100 nodes try to mount, they are successful, but can't read large files (~600mb). They display the error message server <hostname> not responding, still trying and sit there not realling doing much (as far as i can tell). The MTU is set at the default of 1500 on all of the NICS (gigabit and 10/100). If anyone has seen this problem and knows a way around it I'd appreciate some hints. Thanks Mike Poublon