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Date: Mon, 15 Mar 2010 19:55:16 +0530 From: raj ravi <mekaviraj@...il.com> To: netdev@...r.kernel.org Subject: tcp_reordering as 0 possible? Hi, what is the behaviour in TCP stack if I set tcp_reordering as 0. So , sender will start retransmission without waiting for any duplicate ACK ? /proc/sys/net/ipv4/tcp_reordering - Please clarify. The default value is 3 which means it waits until 3 duplicate ack's arrive and then start retransmission. "The TCP sender should use the fast retransmit algorithm to detect and repair loss based on incoming duplicate ACKs. After the arrival of 3 duplicate ACKs (4 identical ACKs without the arrival of any other intervening packet), TCP performs a retransmission of what appears to be the missing segment, without waiting for the retransmission timer to expire." Thanks! Kavi -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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