Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 12 Aug 2002 03:24:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 12 Aug 2002 03:24:27 -0400 Received: from romulus.cs.ut.ee ([193.40.5.125]:2451 "EHLO romulus.cs.ut.ee") by vger.kernel.org with ESMTP id ; Mon, 12 Aug 2002 03:24:25 -0400 Date: Mon, 12 Aug 2002 10:28:10 +0300 (EEST) From: Meelis Roos To: Alexey Kuznetsov cc: linux-kernel@vger.kernel.org Subject: Re: Linux TCP problem while talking to hostme.bkbits.net ? In-Reply-To: <200208112125.BAA16174@sex.inr.ac.ru> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2515 Lines: 76 > Well, if this is so easy to reproduce, you could try to answer this. :-) Before and after the connetion attempt - looks like the number of bad segments is increasing so probably not a TCP bug. Since I can connect to this server fine from different locations, it looks like something (ISP caches/shapers? cable modem?) is corrupting specific packets in a reproducible way. --- enne 2002-08-12 10:22:47.000000000 +0300 +++ nyyd 2002-08-12 10:23:37.000000000 +0300 @@ -1,9 +1,9 @@ Ip: - 490363 total packets received + 490378 total packets received 54146 forwarded 0 incoming packets discarded - 467788 incoming packets delivered - 391339 requests sent out + 467803 incoming packets delivered + 391348 requests sent out Icmp: 32786 ICMP messages received 0 input ICMP message failed. @@ -16,33 +16,33 @@ destination unreachable: 11 echo replies: 4 Tcp: - 3012 active connections openings + 3013 active connections openings 31 passive connection openings 0 failed connection attempts 0 connection resets received 0 connections established - 385065 segments received - 355005 segments send out + 385077 segments received + 355011 segments send out 437 segments retransmited - 801 bad segments received. + 808 bad segments received. 761 resets sent Udp: - 18080 packets received + 18083 packets received 11 packets to unknown port received. 0 packet receive errors - 2873 packets sent + 2876 packets sent TcpExt: ArpFilter: 0 - 321 TCP sockets finished time wait in fast timer + 322 TCP sockets finished time wait in fast timer 3621 delayed acks sent 9 delayed acks further delayed because of locked socket Quick ack mode was activated 141 times - 767 packets directly queued to recvmsg prequeue. + 777 packets directly queued to recvmsg prequeue. 1241624 packets directly received from backlog 556184 packets directly received from prequeue 298158 packets header predicted 1271 packets header predicted and directly queued to user - TCPPureAcks: 5053 + TCPPureAcks: 5056 TCPHPAcks: 16768 TCPRenoRecovery: 0 TCPSackRecovery: 2 -- Meelis Roos (mroos@linux.ee) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/