Subject: Question about the if_ep driver
To: None <port-i386@NetBSD.ORG>
From: Brian Buhrow <buhrow@cats.ucsc.edu>
List: port-i386
Date: 03/13/1996 18:00:26
	Hello Fellow NetBSD users.  I'm running a fairly current 1.1A
on a penteom 100 with 32MB of ram and a 3Com 3c509 aui/tp ethernet card
with aui configured as the interface to use.  The card works fine, and
throughput doesn't seem to be a problem, however, the input error rate
seems to be high.  For example, here is the output of netstat -i after
merely 2 days of almost no activity.

Script started on Wed Mar 13 17:53:28 1996
rumpleteazer# uptime
 5:53PM  up 2 days,  4:18, 1 user, load averages: 0.11, 0.12, 0.10
rumpleteazer# netstat -i
Name  Mtu   Network     Address              Ipkts Ierrs    Opkts Oerrs  Coll
ep0   1500  <Link>      0.a0.24.5a.c9.9b    313642 12171   119250     0    10
ep0   1500  128.114.129 rumpleteazer.UCSC   313642 12171   119250     0    10
lo0   32768 <Link>                             366     0      366     0     0
lo0   32768 your-net    LOCALHOST              366     0      366     0     0
sl0*  296   <Link>                               0     0        0     0     0
sl1*  296   <Link>                               0     0        0     0     0
ppp0* 1500  <Link>                               0     0        0     0     0
ppp1* 1500  <Link>                               0     0        0     0     0
tun0* 1500  <Link>                               0     0        0     0     0
tun1* 1500  <Link>                               0     0        0     0     0
rumpleteazer# exit
Script done on Wed Mar 13 17:53:44 1996

	Can anyone explain why the input error rate is so high?
We do have this machine on a very busy subnet, but this error rate seems
like it would have a severe performance impact
on the ethernet performance of this machine.  Yet, the driver logs no
messages from the kernel.
Is this error rate all right?  Is this just over-sensativity from the
driver?  Is it polling the card, coming up empty and incrementing the input
error count?
I can investigate further, but if anyone knows particularly what this
number means, I'd love to hear about it.

-thanks
-Brian