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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

576.0. "demfa and filtering addresses" by ABACUS::PEREIRA () Tue May 19 1992 12:36

    
hello,


	Does the DEMFA have the ability to filter on address and protocol?? 
	A few years back I attended the Vax 9000 announcement at ZKO. I seem 
	to remember some mention of this. Can anyone deny or confirm this??


	Joe P.

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576.1It does.MIPSBX::thomasThe Code WarriorTue May 19 1992 15:360
576.2STAR::GAGNEDavid Gagne - VMS/LAN DevelopmentTue May 19 1992 21:535
    And VMS uses that feature.
    
    If ULTRIX supports the DEMFA, I don't believe that they use the
    protocol filtering feature; they only use the address filtering
    feature (it's a matter of driver design within the O/S).
576.3can I control it?BRAT::PEREIRAWed May 20 1992 12:3812
    
    It sounds like this feature can come in handy, if a person can control 
    what is being filtered. How would I (as a human) configure the DEMFA: 
    NCP, NCL, SYSGEN,?
    
    
    regards
    Joe Pereira
    
    
    
    
576.4yBRAT::PEREIRAWed May 20 1992 12:397
    
    or better yet, where is the documentation located?? VTX SPD tells me
    very little.
    
    
    joe
    
576.5MIPSBX::thomasThe Code WarriorWed May 20 1992 14:105
Filtering is handling by the driver depending on what datalink users exist.
If you start an applicatino which uses SAP 7E for example, the DEMFA driver
will add that user to the DEMFA automaticly.  There is no need for an 
application or network manager to know what the internal interface between
the driver and a adapter is as long as the driver performs correctly.
576.6Why?ORACLE::WATERSI need an egg-laying woolmilkpig.Wed May 20 1992 15:099
>    It sounds like this feature can come in handy, if a person can control 
>    what is being filtered. How would I (as a human) configure the DEMFA: 

    The point others are trying to make in response to your question is
    this: Can you propose an application that requires extra (manual)
    control over DEMFA's filtering?  Why not just control what applications
    are installed on the system, if you want to control what goes over its
    adapter?  This is why operating systems don't have switches to fiddle
    with the automatic filters in the network adapters.
576.7DEMFA technical descriptionORACLE::WATERSI need an egg-laying woolmilkpig.Wed May 20 1992 15:217
> where is the documentation located?? VTX SPD tells me

    Documentation (internal use only) for virtually all DEC-serviced hardware
    products can be ordered from Literature Order Service.  $ VTX LOS
    will get you to their extensive catalog.
    DEMFA Technical Description can be ordered as EK-DEMFA-TD by sending
    mail to NEST::ORDER with your mail stop, name and cost center.