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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

1707.0. "DEFPA and OBR" by LISSYS::DOMINGUES () Tue Jun 06 1995 05:46

Hi,

I'd like to know if the DEFPA still work as a repeater when a shutdown is issue
on a OpenVMS system.
Could anyone please tell me the beavior of the board when the power is up but no
operating system running on the machine.


Best regards,

Thanks in advance,

//Manuel

EMAIL LISVAX::DOMINGUES or  MANUEL DOMINGUES @XIP
DTN: 799-8020
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1707.1NETCAD::STEFANIWelcome to the Revolution!Tue Jun 06 1995 08:1114
>>I'd like to know if the DEFPA still work as a repeater when a shutdown is issue
>>on a OpenVMS system.
>>Could anyone please tell me the beavior of the board when the power is up but no
>>operating system running on the machine.
    
    Are you near the system?  If the green LED goes out on the back of the
    DEFPA, then it's off the ring.  If the green LED is solid green, then
    the card is still active and is on the ring.  If the green LED is
    blinking green, then the card is still active, but is NOT currently on
    the ring.  Aside from checking with the driver developer, this is the
    most accurate way of visually determining the behavior of the adapter
    in those different states.
    
       - Larry
1707.2LISSYS::DOMINGUESTue Jun 06 1995 09:4619
Larry,

thanks for your quick reply.

I will be at customer site tomorrow and I will check it , but the customer says
that the system gets off the ring and don't repeat any more.

What I was looking for is the rigth beavior of the board/driver rather then the
real one.

So, if someone could tell me what should be the rigth beavior would be nice.

From the user manual, it says that the board only needs a OBR in the case of a
power down or a card failure, but that doesn't answer my question.


best regards,

//Manuel
1707.3STAR::STOCKDALETue Jun 06 1995 09:553
The VMS driver resets the DEFPA on system shutdown.

- Dick
1707.4LISSYS::DOMINGUESTue Jun 06 1995 13:356
So, it means that will always lose the repeat capability ?
Will it be changed in a near future?

rgds,

Manuel
1707.5NETCAD::STEFANIWelcome to the Revolution!Tue Jun 06 1995 14:0915
>>So, if someone could tell me what should be the rigth beavior would be nice.
    
    As you can tell from Dick's reply (1707.3), the OpenVMS driver takes
    the adapter off-line during system shutdown.  This is consistent with
    our other drivers (NT, SCO UNIX, NetWare) that take the adapter off the
    network during system shutdown or driver unload.
    
    If the system in question is repeatedly shutdown, then I would
    recommend to the customer that they do NOT place it on the dual-ring,
    but rather, connect it as an end node to an FDDI concentrator.  If they
    do intend to put it on the dual ring, and the node is often shutdown,
    then they'll need to either live with the wrapped dual ring
    configuration or possibly invest in an OBR to keep the dual ring alive.
    
    /l
1707.6LISSYS::DOMINGUESWed Jun 07 1995 06:173
Thanks very much !

/Manuel