Date: Sat, 28 Feb 1998 04:07:16 -0600 (CST) From: Font <font@Mcs.Net> To: questions@FreeBSD.ORG Subject: Unexplainable? delay when ftping Message-ID: <Pine.BSF.3.95.980228035310.9658A-100000@Jupiter.Mcs.Net>
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When ftp'ing from home into work over ppp, I'll notice the modem lights
inactive for several moments during file transfer. This makes the
transfers much less efficient. The modem doesn't seem to be retraining,
because if I do something else like ping the ftp server, the response
comes back right away, between the file transfer pauses.
The ftp server is running 2.2.5-RELEASE, the ftp client is running
2.2.5-RELEASE. The ftp server has an Intel EtherExpress Pro/100B on a
10baseT network with MTU 1500. The ppp server is a Livingston PortMaster
2e with Framed-MTU = 1500.
If, over the same ppp connection, I ftp to an Internet host, I can get the
expected transfer rate (2.5+ K/s on a compressed file), but from a host on
my LAN I'm only getting 1.7-1.9 K/s on the same files.
Would packet fragmentation cause a several-second delay in the middle of
an ftp session? I did try setting the MTU down to 576 on the PM2e and in
my ppp.conf, to no avail.
Or are both the client and server in the exchange waiting for something
hopefully provided by the other, some kind of ACK that takes a while to
sync up on again?
I find it wacky, but I'd like to learn what causes this. Plus (and you
knew this was coming if you read any of my PortMaster confusion posts,
problem which ended up being a misconfigured firewall delaying DNS
resolution for extremely long periods of time), Win95 and MacOS don't have
this problem when connected over the same PM2e/modem/ftp server.
Suggestions welcome. I feel like the anti-Doug White, someone who asks
too many questions and answers too few. :-(
dw
A bug in my MUA causes news.announce.newusers font
to be sent to beneficiaries and senders of UCE/SPAM. @
mcs.net
Wishes are like dishes.
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