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Date: Tue, 11 Mar 1997 16:56:47 -0800 (PST)
From: Doug White <dwhite@gdi.uoregon.edu>
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Reply-To: Doug White <dwhite@resnet.uoregon.edu>
To: Larry Dolinar <LARRYD@bldg1.croute.com>
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Subject: Re: slow FTP from some customers
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On Tue, 11 Mar 1997, Larry Dolinar wrote:

> We run 2.1.0-R on the follwing gear:
>     Asus Triton II, 256K cache
>     P5-75
>     32MB RAM
>     Adaptec 2940
>     Seagate 2GB
>     3Com 3C590 (ep0)

You meant 3c509, I bet.  The 590 would be a PCI card supported by the vx
driver, if that was even in 2.1.0.  That's pretty old...

> Our link to the Internet is through an Ascend P50 (2B+D), generally up all 
> the time, but not necessarily both channels.

Boom, right there.  Ascends are known rogues.  Disable tcp extensions in
/etc/sysconfig (or the sysctl's net.inet.tcp.rfc1323 and
net.inet.tcp.rfc1644), or replace the Ascend with a better unit. 

> Some of these are new customers, some aren't; particularly the older
> customers have noticed a change, but I'm unable so far to pin it down to
> anything on the machine.  There have been no changes to any running software
> that I'm aware of, and I can be dealing with a problem connection at the same 
> time someone else is flying along -- there are seldom more than 3 connections 
> at any one time.

These people may also be behind bad hardware or just experiencing
overloaded connections.  It's gotten bad enough that I can't get to
ftp.freebsd.org during the day, and the UO has a pretty chunky outbound
link.  :(

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major