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Date:      Wed, 29 Jan 2003 18:54:25 +0100 (CET)
From:      Robert Joosten <robertj@wirehub.nl>
To:        "Peter N. M. Hansteen" <peter@bgnett.no>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: bizarre ep (3c509-Combo) behavior: one and a half init, minimal throughput
Message-ID:  <Pine.BSF.4.53.0301291829220.34501@chelsea.basta-matic.org>
In-Reply-To: <87fzrc3tly.fsf@tosh.datadok.no>
References:  <87fzrc3tly.fsf@tosh.datadok.no>

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Hi,

> ep0: <3Com 3C509-Combo EtherLink III> at port 0x300-0x30f irq 5 on isa0
> ep0: Ethernet address 00:a0:24:ca:7c:b0
> then once more as
> ep1: <3Com 3C509-Combo EtherLink III> at port 0x300-0x30f irq 5 on isa0
> ep1: No I/O space?!
> ep1: ep_alloc() failed! (6)
> There is only one network card in the machine, I promise!

I know these ep's, they're supported but only work so-so.

I found out you must keep the order your kernel-config lists them intact
(that's ed0, then ex, and then ep, followed by fe0) and also man keep that
fe0 following the ep device. I experimented with this (read: wasted a lot
of time) to figure out what and how.

I'm running a old '486 running 4.7R with two ep's:

Jan 29 13:01:42 t2ja /kernel: ep0: <3Com 3C509-TPO EtherLink III> at port
0x300-0x30f irq 10 on isa0
Jan 29 13:01:42 t2ja /kernel: ep0: Ethernet address 00:20:af:b8:96:8c
Jan 29 13:01:42 t2ja /kernel: ep1: <3Com 3C509-TPO EtherLink III> at port
0x310-0x31f irq 11 on isa0
Jan 29 13:01:42 t2ja /kernel: ep1: Ethernet address 00:60:08:c6:a2:77

with only some minor issues: blasting a lot of traffiq through it causes
some mbuff trouble which degardes performace to nearly zero, I always shut
the interface down, wait a few seconds and the throw it up again. As long
as the interface's not threated, performance keeps suffering lasting for
hours and maybe days...! A precursor is the appearance of OACTIVE in the
ifconfig output regarding that interface.

One sysadmin I know told me 3com released various series of these cards.
The most recent models suppose to run flawlessly under *nix. The earliest
models should be avoided. Windows doesn't care at all.

And yes: I know from 1st hand experience Linux supports these cards
very well (They did a wonderfull job on my 386xs/25 running Slackware 3.9
(kernel 2.0.37).

Rj

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