A.P. Lawrence

Best of the Newsgroups: nic ftp slow 10/100 auto negotiate

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From: Jeff Liebermann <jeffl@comix.santa-cruz.ca.us>
Subject: Re: FTP slow xfer SCO OpenServer 5.06?
Date: Sun, 25 May 2003 21:29:53 -0700 References: <8594ba46.0305251125.7c49861d@posting.google.com>

On 25 May 2003 12:25:05 -0700, meba@wi.rr.com (Perry Whelan) wrote:

>So, this is a bit odd.  I've got 2 SCO OpenServer 5.06 servers, both
>are fully licensed & registerd. They're attached to a 100Mbps switch &
>have 100Mpbs NIC's.  Using the stock ftp server/client to xfer files,
>a ~500MB file xfer'd in ~2hr <-- I'm not exagerating!  Even 5GB file
>ought not take that long...

Did ftp performacne work correctly BEFORE you upgraded to 3.2v5.0.6?

The first step to solving any problem is to assign the blame.  Plug a
known working 3rd computah into the switch and try file transfers
to/from both of the two OSR5 machines.  Perhaps *ONE* of the OSR5
servers is screwing up, not both.

If your unspecified NIC's are 3Scum 3C905 cards, some of the early
versions before Rev C had the nasty habit of not successfully NWAY
negotiating the speed with some switches.  The fix is to tweak the
space.c file for the 3C905 to NOT auto-negotiate and to use a suitable
speed and  protocol.  I suggest 100baseTX half-duplex.  If that works,
try full-duplex.  Be sure to unplug the cable from the switch when
changeing speeds and full/half duplex to reset the port.

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Are you sure that the packets are actually going directly between the
two machines?  Run:
  traceroute other_machine_ip
and
  netstat -rn
to be sure.  I got fooled a while back when RIP setup a bizarre route
out to a remote router.  It actually worked, but was dismally slow.
If you're not using RIP, kill the routed daemon and comment it out of
/etc/tcp to prevent it from restarting.  Oh yeah, try:
  ping other_machine_ip
If it's slower than a snail, something odd it going on in between
machines.  I have a Netgear FS-508 the periodically goes insane where
the only symptoms are extremely long delays through the switch.

-- 
Jeff Liebermann  150 Felker St #D  Santa Cruz CA 95060
(831)421-6491 pgr  (831)336-2558 home
http://www.LearnByDestroying.com   AE6KS
jeffl@comix.santa-cruz.ca.us   jeffl@cruzio.com

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