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

If this isn't exactly what you wanted, please try our Search (there's a LOT of techy and non-techy stuff here about Linux, Unix, Mac OS X and just computers in general!):

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.

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

Jump to Comments

Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them. I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. I also may own stock in companies mentioned here. If you have any question, please do feel free to contact me.

Specific links that take you to pages that allow you to purchase the item I reviewed are very likely to pay me a commission. Many of the books I review were given to me by the publishers specifically for the purpose of writing a review. These gifts and referral fees do not affect my opinions; I often give bad reviews anyway.

We use Google third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, click here.