Subject: Re: SS20 network performance, take 2
To: None <jwbirdsa@picarefy.com>
From: Brian A. Seklecki <lavalamp@spiritual-machines.org>
List: port-sparc
Date: 05/25/2002 13:33:06
On 21 May 2002 @ 4:55am (-0000), jwbirdsa@picarefy.com wrote:

>    Are you sure that the cards and hubs/switches on both ends agree on
> speed and duplexing? These cards have a history of not autonegotiating
> properly. It sounds like they're at least negotiating to 100mbps properly,

Right, an unbiased test would include a x/over ethernet cable of
appropriate length between both machines (as to avoid NEXT) and both cards
forced 100/full.

When testing, avoid using a switch or a hub (spoken: 'multi-
port-repeater').  If there's a device sitting between the two machines,
the test is skewed from the beginning.

If you have switch w/ management features, put both ports in thier own
vlan as to consolidate the collision/broadcast domains.

later -
-lava

> or it wouldn't be working at all/achieving those speeds, but HDX/FDX
> confusion can leave the link working, but limping along with poor
> performance.
>
>    --James B.
>