As background, I have a CentOS 5 workstation accessing data on an NFS server in a different internal domain (VLAN?) with traffic passing through multiple firewalls, and the "disk" access is painful.
One job is taking 4x longer, just because the data is on the NFS server instead of local disk.
However, we have other CentOS 4 workstations that are in a different domain, and they do not show the same slowdown.
So, I am thinking the problem is either the firewall latency, slow switch for my internal domain, bad match between ethernet driver and local hardware that's too new, or bad NFS client configuration.
My question is, "How would you troubleshoot this networking problem and converge on the problematic link?"