Hi: We have an issue with several FC5 systems; each exhibits slow TCP transfers (~15KB/s using ttcp, expecting ~200KB/s) only when the client and server are both FC5 systems. Windows/Solaris/CentOS/OS X transfers to these same FC5 systems work fine. When both are FC5, issues arise. We tried several versions of stock kernels, including 2.6.18-1.2257.fc5. We also tried modifying the net.ipv4.tcp_congestion_control parameter to reno, vegas, etc., but no luck. Before we dig deeper has anyone else run into similar issues? TIA, -Tate - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html