Re: [foxboro] network storm

  • From: "Hicks, Gaylon F" <gfhicks@xxxxxxx>
  • To: <foxboro@xxxxxxxxxxxxx>
  • Date: Mon, 9 Feb 2009 01:02:20 -0500

Let me muddy the water a little (more).  VLANs are supported by Foxboro,
and are part of the MESH configurator tool, and a separate network using
separate switch hardware for the ZCP fieldbus is an officially supported
architecture.  

What is not an explicitly approved architecture is using VLANs to
segment the ZCP field bus(es) from the control network, although
functionally it is the same as the separate switch architecture.  And by
"explicitely approved" I mean it isn't a documented and tested
configuration by Foxboro, although it is pretty obvious that it will,
and does, work fine.  The problem with the separate switches on the ZCP
fieldbus is that you can't monitor those switches and ports in SMDH,
where the VLAN solution does let you monitor those ports. 

The same goes for the multicast rate limiting policies.  Although it
works fine, it doesn't (or didn't) fall under the umbrella of officially
tested configurations.

Russ? - Would you or any of the other Foxboro folks care to weigh in on
this?  If I have mis-stated any of this, please do.

For more light reading on the subject, you can take a look at these
documents - 

B0700AX-H - The MESH Control Network System Planning and Sizing 
B0700AZ-K - The MESH Control Network Architecture Guide
B0700CA-H - The MESH Control Network Operation, and Switch Installation
and Configuration Guide

Thanks,
Gaylon Hicks
TVA - Browns Ferry


-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Jeremy Milum
Sent: Saturday, February 07, 2009 4:03 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] network storm

On Sat, Feb 7, 2009 at 12:01 PM, Boulay, Russ
<russ.boulay@xxxxxxxxxxxxxxxx> wrote:
> ** I'll have to give kudo's to Gaylon, as we reviewed his Mesh Network
a few weeks back.
> It was the cleanest running Mesh system that I have reviewed in the
last few years.
> Vlans for fieldbus, some broadcast limiting, Mesh was running at peak
performance.

many of the suggestions that Gaylan mentions are not supported by
foxboro, yet he has the best
network? that's a bit troubling.

do you perhaps have some recommendations you could give us for setting
up our mesh networks?
 
 
 
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