Con,
In general there is some confusion in applying Micro I/A stations in a multi
node environment. This is mainly due to incomplete/vague problem
descriptions in CAR's about this issue. Let me try and clarify the matter:
In order to be able to boot a Micro I/A (MIA in short) following needs to be
O.K.:
a) The MIA ('s) should be properly defined in SYSDEF and the resulting
commit diskette installed. The type of node in the configuration HAS TO BE
the MIXED type.
b) The system needs to be equipped with what is called the "Letterbug
Server". Analogous to the CSA server, there is only ONE Letterbug Server
allowed in the system, regardsless of the number of nodes is consists of.
c) The MIA, like all other bootable non-host stations, requires a
hosting station. This can be any of the 50, 51 or 70 series boxes. One or
more MIA's are hosted by such a station if the file
/usr/fox/sp/files/CMXFCBOOT.BIN exists.
d) EVERY MIA AND ITS HOSTING STATION HAVE TO RESIDE IN THE SAME NODE.
Here the MIA differs from all other I/A stations which can all be booted
over the LAN. For some reason this inability to boot MIA's over the LAN was
explicitly requested by Foxboro marketing in the development stage of the
MIA.
e) There is NO NEED WHATSOEVER for the Letterbug Server to reside in the
same node as the MIA.
f) If the connection between the MIA and the nodebus is made using a
NodeBus Interface (also known as MAU) the use of a so called SQE eliminator
(Part no P0940KS) is MANDATORY. This little gold coloured box is sometimes
incorrectly referred to as a Nodebus Tranceiver. It should be positioned
inbetween the NBI/MAU and the HUB, see B0193VJ for details. The need for
this SQE eliminator device does NOT exist when a DNBT is used instead of the
NBI/MAU.
Hope this clarifies the matter.
Regards,
René Bakker + Marco Simpelaar - Foxboro EuroTAC - Baarn - the Netherlands
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 09, 2001 04:23 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Letterbug Server on a Multinode System
Hi list,
any users familiar with the Micro I/A Letterbug server (omclbsvr)!
We have a 50 Series Unix based multinode system @ V6.2.1 with Micro I/A
controllers on one Node only. This node hosts the letterbug mapper for the
node and the letterbug server for the site, as SysDef allows only one
letterbug server per system.
We recently added an additional Node with Micro I/A controllers and a
letterbug mapper. The mapper on the new node communicates OK with the server
over the carrierband LAN, but the Micro I/A's on the new node will not
register with the Letterbug Server on the existing node (over the LAN). The
Micro I/A's on the new node do not even get as far as loading the Mini OS,
(Flashing Leds).
Anybody come across this problem before?
Con Kiely
mailto:[EMAIL PROTECTED]
+353 21 4702567
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