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Conference 7.286::fddi

Title:FDDI - The Next Generation
Moderator:NETCAD::STEFANI
Created:Thu Apr 27 1989
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2259
Total number of notes:8590

654.0. "Translation and Void Packets" by WARNUT::HUNT_JS (Smile - ��� ) Thu Jul 23 1992 13:44

Hi,

In answer to a question in an ITT, I have to describe what our DECBridge 6xx
does with void packets when translating a frame to make it compliant with the
frame format of a destination network. 

Is the answer as simple as "Void frames are ignored by the DECBridge 6xx"?

Thanks for any help.

Cheers, Jim
T.RTitleUserPersonal
Name		DateLines
654.1KONING::KONINGPaul Koning, A-13683Thu Jul 23 1992 19:047
Yes.

More in general, ONLY LLC frames are forwarded.  Other frames are either 
processed locally (SMT frames, for example -- exactly as an endnode would)
or ignored (for example, Implementer frames).

	paul
654.2Implementer Frame ??WARNUT::HUNT_JSSmile - ��� Fri Jul 24 1992 10:5212
Hi Paul,

Thanks for that fast response!!

A futher couple of simple questions, if I may, an SMT frame I understand
(Station Management and all that) but what is an "Implementer" frame? 

By saying SMT frames are processed locally are you saying that they aren't
passed across FDDI? If so, how do you manage a remote (from your ETHERNET)
FDDI component? I think I must have missed something here 

Cheers, Jim
654.3KONING::KONINGPaul Koning, A-13683Mon Jul 27 1992 15:5713
"Implementer frame" is a type of data frame similar to LLC, but with a different
frame control field.  It has no defined meaning or purpose, and I know of
no application for it.  Think of it as a "reserved for who knows what" frame.

Correct, SMT frames are not passed from the FDDI on which they started to
any other network.  That's why sensible people don't claim that SMT frames
are the answer to your network management problems!  Network management is
done by general purpose network management protocols that are NOT FDDI specific,
and NOT limited to a single FDDI network.  SNMP is one such protocol;
DECnet network management and ELMS are others.  (ELMS, though, is limited to
a single extended LAN.)

	paul