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Conference netcad::hub_mgnt

Title:DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:NETCAD::COLELLADT
Created:Wed Nov 13 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:4455
Total number of notes:16761

2263.0. "address limits on per-port security" by CX3MAN::AMBER (Mark Amber, CNS-West (DTN)592-4645) Tue May 09 1995 18:45

    Regarding the address limitations on per-port security...
    
    I have some old literature on the 900TM that says it is limited to two
    addresses per port.
    
    What are the limitations on the newer 900 (and 90TS) repeaters?
    Is this limited by software, firmware, or hardware?
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2263.1NETCAD::HERTZBERGHistory: Love it or Leave it!Wed May 10 1995 10:325
    The 90TS is the same as the 900TM.
    
    The 900TP and 900CP will be limited to four addresses per port when
    they ship.  This limitation is part hardware, part firmware.  What is
    software?   ;^)
2263.2I little more clairification, pleaseCX3MAN::AMBERMark Amber, CNS-West (DTN)592-4645Wed May 10 1995 11:0417
    >>    The 90TS is the same as the 900TM.
    
    So by this do you mean "two addresses"?
    As long as phase-IV decnet stays around, this basically means "one
    node" per port, right?  (hardware address for boot and physical address
    once up and running)
    
    >> The 900TP and 900CP will be limited to four addresses per port when
    >> they ship.  This limitation is part hardware, part firmware.  
    
    Well, thats an improvement, but 8 or 16 would seem more practical.
    Any chance at all that a future firmare upgrade could increase this limit?
    
    >> What is software?   ;^)
    
    HubWatch.  I thought perhaps the limitation _may_ be in Hubwatch
    itself, and the the repeater itself.  I guess not.
2263.3NETCAD::HERTZBERGHistory: Love it or Leave it!Wed May 10 1995 11:3117
    >>  So by this do you mean "two addresses"?
    
    Yes.  And your understanding of one node per port is correct.
    
    >>  Well, thats an improvement, but 8 or 16 would seem more practical.
    >>  Any chance at all that a future firmare upgrade could increase this 
    >>  limit?
    
    The portswitch products are based on repeater ASICs which contain
    security address hardware for 16 addresses per group of four ports. 
    This is a hardware limitation.  The first release of firmware, for
    simplicity, allocated the available address pool as a fixed four
    addresses per port.  This should give you an idea of what is
    theoretically possible in future firmware releases... a fixed eight or
    sixteen addresses per port is not among the possible.
    
    								Marc