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Date:      Tue, 17 Dec 2002 09:31:40 +0100
From:      Mark <admin@asarian-host.net>
To:        <stacey@vickiandstacey.com>
Cc:        <freebsd-questions@freebsd.org>
Subject:   Re: Upload substantially slower than download
Message-ID:  <200212170831.GBH8VKM42847@asarian-host.net>
References:  <200212170027.GBH0RUW29189@asarian-host.net><1040085387.86677.105.camel@asarian-host.net> <1040109376.86677.125.camel@localhost>

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----- Original Message -----
From: "Stacey Roberts" <stacey@vickiandstacey.com>
To: "Mark" <admin@asarian-host.net>
Cc: "FreeBSD Questions" <freebsd-questions@FreeBSD.ORG>
Sent: Tuesday, December 17, 2002 8:16 AM
Subject: Re: Upload substantially slower than download


> Do the transfers (in both directions) with tcpdump running on the
> FBSD box. You would get the complete conversation between
> both boxes, and be able to see what is actually happening at
> the packet level.


Hi Tracey (and others),

Thanks for the continued help. Ok, I did a tcpdump; like this:

"tcpdump host test-server.net and port 22"

This is what I get back on an UPLOAD:

--------------------------------------------------------------
09:22:13.371011 192.168.79.3.1845 > test-server.net..ssh: P
3060397:3061289(892) ack 992 win 63760 (DF)
09:22:13.439905 test-server.net..ssh > 192.168.79.3.1762: . ack 11857 win
58400 (DF) [tos 0x10]
09:22:13.469905 test-server.net..ssh > 192.168.79.3.1845: . ack 3061289 win
58400 (DF)
09:22:13.470415 192.168.79.3.1845 > test-server.net..ssh: .
3061289:3062749(1460) ack 992 win 63760 (DF)
09:22:13.470539 192.168.79.3.1845 > test-server.net..ssh: .
3062749:3064209(1460) ack 992 win 63760 (DF)
09:22:13.470561 test-server.net..ssh > 192.168.79.3.1845: . ack 3064209 win
56940 (DF)
09:22:13.470662 192.168.79.3.1845 > test-server.net..ssh: .
3064209:3065669(1460) ack 992 win 63760 (DF)
09:22:13.470685 test-server.net..ssh > 192.168.79.3.1845: . ack 3065669 win
58400 (DF)
09:22:13.470785 192.168.79.3.1845 > test-server.net..ssh: .
3065669:3067129(1460) ack 992 win 63760 (DF)
09:22:13.470907 192.168.79.3.1845 > test-server.net..ssh: .
3067129:3068589(1460) ack 992 win 63760 (DF)
09:22:13.470923 test-server.net..ssh > 192.168.79.3.1845: . ack 3068589 win
56940 (DF)
09:22:13.470984 192.168.79.3.1845 > test-server.net..ssh: P
3068589:3069481(892) ack 992 win 63760 (DF)
09:22:13.569901 test-server.net..ssh > 192.168.79.3.1845: . ack 3069481 win
58400 (DF)
09:22:13.570477 192.168.79.3.1845 > test-server.net..ssh: .
3069481:3070941(1460) ack 992 win 63760 (DF)
09:22:13.570599 192.168.79.3.1845 > test-server.net..ssh: .
3070941:3072401(1460) ack 992 win 63760 (DF)
09:22:13.570618 test-server.net..ssh > 192.168.79.3.1845: . ack 3072401 win
56940 (DF)
09:22:13.570722 192.168.79.3.1845 > test-server.net..ssh: .
3072401:3073861(1460) ack 992 win 63760^C

6614 packets received by filter
0 packets dropped by kernel
--------------------------------------------------------------

And this on a DOWNLOAD (which goes real fast):

--------------------------------------------------------------
09:25:53.109400 192.168.79.3.1845 > test-server.net..ssh: . ack 7842077 win
64240 (DF)
09:25:53.110732 test-server.net..ssh > 192.168.79.3.1845: .
7842473:7843933(1460) ack 13128 win 58400 (DF)
09:25:53.110762 test-server.net..ssh > 192.168.79.3.1845: .
7843933:7845393(1460) ack 13128 win 58400 (DF)
09:25:53.110781 test-server.net..ssh > 192.168.79.3.1845: .
7845393:7846853(1460) ack 13128 win 58400 (DF)
09:25:53.110793 test-server.net..ssh > 192.168.79.3.1845: .
7846853:7848313(1460) ack 13128 win 58400 (DF)
09:25:53.110881 test-server.net..ssh > 192.168.79.3.1845: .
7848313:7849773(1460) ack 13128 win 58400 (DF)
09:25:53.111169 192.168.79.3.1845 > test-server.net..ssh: . ack 7843933 win
64240 (DF)
09:25:53.111346 192.168.79.3.1845 > test-server.net..ssh: . ack 7846853 win
64240 (DF)
09:25:53.111565 192.168.79.3.1845 > test-server.net..ssh: . ack 7849773 win
64240 (DF)
09:25:53.111584 test-server.net..ssh > 192.168.79.3.1845: P
7849773:7850153(380) ack 13128 win 58400 (DF)
09:25:53.112766 test-server.net..ssh > 192.168.79.3.1845: .
7850153:7851613(1460) ack 13128 win 58400 (DF)
09:25:53.112789 test-server.net..ssh > 192.168.79.3.1845: .
7851613:7853073(1460) ack 13128 win 58400 (DF)
09:25:53.112821 test-server.net..ssh > 192.168.79.3.1845: .
7853073:7854533(1460) ack 13128 win 584^C
--------------------------------------------------------------

I cannot say these numbers mean a great deal to me (yet); does this kind of
output make any sense?

Thanks again!

- Mark


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