[olug] Network Performance

[Brian Roberson]

before changing any transceiver options, a simple "ifconfig" command will
tell you if you are having collisions, only then would I look at duplex
problems. If you are getting 70-80% line rate, your network is solid. The
details you have laid out are pointing to the problem of not enough
bandwidth, solutions are pretty clear, either reduce the amount of packages
being installed ( Perhaps the things that Vincent laid out ) or bite the
bullet and buy better switches.

----- Original Message ----- 
From: "Daniel Linder" <dan at linder.org>
To: "Omaha Linux User Group" <olug at olug.org>
Cc: "olug list" <olug at olug.org>
Sent: Friday, December 12, 2003 9:20 PM
Subject: Re: [olug] Network Performance


> > Which is a faster server FTP or HTTP?
>
> My gut instinct says that FTP is faster, but nothing concrete...
>
> > Can a 10 MB Network ever run at 10 MB or is 6-7 MB fantastic?
>
> Due to the inherent nature of Ethernet and TCP/IP, 70% utilization on a
> network with other traffic is about the best you will get.
>
> [snip...]
> > The system are P4 and have gigabit cards but the switches are limited to
> > 10 MB so the NIC only boots at 10 MB.
>
> If it is between two machines, can you use a crossover cable and go
> Gig-to-Gig?  <drool...>
>
> Also check that your network is running *full* duplex end-to-end.  Hard
> code the NICs (use mii-tool under Linux), and hard-code the switch ports
> if possible.  Rember, there are at least four ports to deal with (PC1,
> Switch port 1, PC2, Switch port 2) plus any in-between if this is a
> multi-switch network.
>
> Dan
>
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