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From: Ben Stuyts <benst@terminus.stuyts.nl>
Date: Wed, 27 Aug 97 22:35:19 +0200
To: stable@FreeBSD.ORG
Subject: Re: Excessive Ierrs from laptop to 2.2-Stable server
Reply-To: ben@stuyts.nl
References: <199708262154.XAA00451@daneel.stuyts.nl>
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I said:

> I am adding a laptop with win95-OSR2 to my server, running FreeBSD
> 2.2-Stable. Getting data from the server to the laptop, for example
> with ftp, works just fine: 400 KB/s. Putting data from the laptop
> on the server gives excessive ierrs: Ipkts:Ierrs is about 25%. I get
> a throughput of only 8 KB/s.
>
> The laptop runs Win95-OSR2, and has a Dynalink 1433QVC combined
> ethernet/modem pcmcia card.
>
> The server is a Pentium-166, 64 MB ram, and an SMC ethernet card:
> de0 <Digital 21041 Ethernet> rev 17 int a irq 11 on pci0:9
> de0: 21041 [10Mb/s] pass 1.1
> de0: address 00:00:c0:1f:54:e8
>
> There is also a NeXT on the network. Ftp-ing from the laptop to the
> NeXT works fine. No Ierrs at all. Ftp-ing from the NeXT to the FreeBSD
> machine works fine too.
>
> There's coax between all the machines. I tried the laptop at home and at
> the office where I have a similar FreeBSD machine. Same results. At the
> office there are a bunch of other pc's with win95 on the net that all work
> fine.
>
> Any ideas? What else can I check?

I saw in the de0 driver that it prints out diagnostics when compiled with  
DIAGNOSTIC, so I tried that. These are the errors I see on the console:

Aug 27 22:30:32 terminus /kernel: de0: receive: 00:20:e0:0c:38:59: alignment error
Aug 27 22:30:33 terminus /kernel: de0: receive: 00:20:e0:0c:38:59: bad crc
Aug 27 22:30:33 terminus /kernel: de0: receive: 00:20:e0:0c:38:59: alignment error
Aug 27 22:30:35 terminus /kernel: de0: receive: 00:20:e0:0c:38:59: alignment error
Aug 27 22:30:36 terminus /kernel: de0: receive: 00:20:e0:0c:38:59: bad crc
Aug 27 22:30:36 terminus /kernel: de0: receive: 00:20:e0:0c:38:59: alignment error
Aug 27 22:30:37 terminus /kernel: de0: receive: 00:20:e0:0c:38:59: bad crc

So, what could cause this? Is this bad hardware, a driver problem, or what?

Please, any help appreciated.

Thanks,
Ben