FreeBSD 5.3 Networking performance problem

[Eli Dart]

In reply to "Andrew Seguin" <asegu at borgtech.ca> :

> Thank you for your reply.
> 
> > Note that if your interface is set to full duplex and the switch is
> > set to half, you'll see lousy performance and very likely see no
> > errors on your side.
> 
> I have to question though... could this explain a stable ping time of 2ms
> when the load is around 2-4mbps and unstable ping times of 2ms to 2s, at
> 10mbps?

Hmmm....I typically see much lower throughput with a duplex mismatch 
(50 to 80 kbytes a second) so this may not be the problem.  The things 
to look for in your switch and router port statistics are the speed 
and duplex settings (obviously) and late collisions.  The presence of 
late collisions often point to a duplex mismatch.  I would check this 
stuff anyway, if only to eliminate it as a variable....  If you don't 
have access to the router and/or switch, ask the folks who do for the 
output of "show interface" for whatever interfaces are connected to 
your firewall.

		--eli

> 
> If so, I shall give it a try tomorrow. I've already ordered Intel pro nics
> (which I use for all my servers on my small network at borgtech.ca with
> great results in a similar but lesser bandwidth situation) and new cables (I
> needed slightly longer ones anyways to put the server in it's final place
> rather then it's testing spot).
> 
> Equipment that the firewall sits between is a Cisco 2600 router (internet
> side) and an HP Procurve switch facing the local LAN.
> 
> Again thank you,
> Andrew
> 


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