Hi, I have managed to send UDP packets with the checksum filed set to "0". Inspite of that I dont seem to be getting any performance improvements at the recieving side.(I am using Netperf). Performance criteria for me would be throughput and CPU utilization. The Ethereal tool was used to verify that the checksum field was indeed 0. Please advice. sai __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html