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