freebsd stable - Jun 2004 - Network Bandwidth Issues

I have experienced severe network bandwidth issues on all versions of
-stable since 4.8, and yet I have never seen any discussion of these
issues.

The way I see these issues has come from having side-by-side boxes on
the same 100M switch have wildly different bandwidth when talking to
various remote sites.  For instance, downloading ports, the newer box
(post 4.8) regularly suffers under 1M bandwidth, while the 4.7 box
merrily trots along at maximum speed.  This seems somehow unrelated to
the actual network hardware, as I have seen the same thing with fxp, de
and rl cards.

Has anyone explored network bandwidth issues in -stable recently?  What
can I do to work out these problems?

Thanks.
/Joe

I have not seen this issue at all. I have 2 systems running 4.9-STABLE. Both
are on the same 100mbit switch and share a 6 mbit DSL line.  Both machines
share the bandwidth evenly.  Cvsup is probably a bad indicator because speed
largely depends on how busy the CVS servers are. 
I compared bandwidth by starting a large download on both systems and
checking bandwidth use with Slurm from the ports area.  I also started
downloads one at a time on each individual machine and they each had no
problem using the full 6mbit pipe.

Darin -


-----Original Message-----
From: owner-freebsd-stable@freebsd.org
[mailto:owner-freebsd-stable@freebsd.org] On Behalf Of Joe Kelsey
Sent: Tuesday, June 01, 2004 4:02 PM
To: stable@freebsd.org
Subject: Network Bandwidth Issues

I have experienced severe network bandwidth issues on all versions of
-stable since 4.8, and yet I have never seen any discussion of these issues.

The way I see these issues has come from having side-by-side boxes on the
same 100M switch have wildly different bandwidth when talking to various
remote sites.  For instance, downloading ports, the newer box (post 4.8)
regularly suffers under 1M bandwidth, while the 4.7 box merrily trots along
at maximum speed.  This seems somehow unrelated to the actual network
hardware, as I have seen the same thing with fxp, de and rl cards.

Has anyone explored network bandwidth issues in -stable recently?  What can
I do to work out these problems?

Thanks.
/Joe


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On Jun 1, 2004, at 13:02, Joe Kelsey wrote:
> I have experienced severe network bandwidth issues on all versions of
> -stable since 4.8, and yet I have never seen any discussion of these
> issues.
>
> The way I see these issues has come from having side-by-side boxes on
> the same 100M switch have wildly different bandwidth when talking to
> various remote sites.  For instance, downloading ports, the newer box
> (post 4.8) regularly suffers under 1M bandwidth, while the 4.7 box
> merrily trots along at maximum speed.  This seems somehow unrelated to
> the actual network hardware, as I have seen the same thing with fxp, de
> and rl cards.
>
> Has anyone explored network bandwidth issues in -stable recently?  What
> can I do to work out these problems?
>
First make sure the duplex setting is the same on the NIC and on the 
switch.