Re: [foxboro] 0% idle time & More than 80% iowait on AW51B

At least one customer uses cron(1) and ifconfig(1) to periodically shutdown
the "2nd Ethernet" port. Turning the port off with ifconfig frees the
resources trapped by the driver when it sees IPX packets. Of course, during
that period, you can't use the port.

The better approach in general is to limit access to the AWs/WPs through the
use of routers/firewalls. You should consider installing a router at the
minimum. With the technological convergence these days, you may find
something advertised as a switch that can filter IPX, but I'd be happer with
a router/firewall.


Hope this helps.

AJ


-----Original Message-----
From: Mark Dumond
To: foxboro@xxxxxxxxxxxxx
Sent: 8/30/03 9:46 AM
Subject: Re: [foxboro] 0% idle time & More than 80% iowait on AW51B

This has been a known issue for some time now.
The problem is: If you have ANY IPX/Novell traffic on your second =
Ethernet
port, the AW51 will begin to slow down over time until you reboot.  It =
has
something to do with the Sun workstation parsing every IPX packet it =
gets.

If you have IPX/Novell traffic on your second Ethernet port, you must
isolate that network traffic from the AW with a router.  An common
inexpensive network switch (not a hub) may also work, but I am not 100%
=
sure
about that.

Your local Foxboro field service should know about this problem, and =
offer
the router installation service.  Alternatively, Alex Johnson's network
group (Foxboro/Houston) can help out also.=20

Hope this helps!
Mark Dumond
Sr App Engineer
FeedForward, Inc
Applications Engineering


-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
=
On
Behalf Of Ashley Davey
Sent: Saturday, August 30, 2003 3:40 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] 0% idle time & More than 80% iowait on AW51B


Hi Ajay

I can't comment on your idle time problem, but I have encountered =
strange
AW51 performance issues in the time before we installed a router between
=
our
IA network and the Corporate LAN.

From what I can remember the Sun network cards have an issue with IPX
traffic and the onlyway to restore performance is to re-boot the =
affected
box.

Hope this helps.

Regards

Ashley Davey
Systems Engineer
African Products (Pty) Ltd
Gauteng, RSA
Tel : +27 11 458 5342
Fax : +27 11 458 5343
Mobile: +27 83 4535169

>>> Ajay.Tathgir@xxxxxxx 30/08/03 7:53:44 AM >>>
Hi! All

We have a AW51B running on Version 6.1. Yesterday on running top, i saw
=
that
the cpu idle time is 0%, and the iowait time was running between 70 - =
90%.
We have had 0% idle time problems before, but then there was always a
process out there who was eating away the cpu time. But this time around
there was not a single process of that kind. Could somebody through some
light onto this one.

Just a piece of additional info. Around 20-25 days back I had connected
=
the
second ethernet port directly to out Plant LAN, without anything =
in-between.
And there is all kinda traffic on this LAN, IP, IPX, NetBEUI, DECnet, to
name a few.

Are the above two related.


Thanks & Regards

Ajay Tathgir

Reliance Industries Limited
Mumbai - India


=20
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