Conference 7.286::fddi

1787.0. "help: 2 x DEFZA back to back on OpenVMS/AXP 6.1" by ROMTSS::MORRONE () Wed Aug 23 1995 08:33

Hi all,

I saw many notes talking about point-to-point FDDI confi-
guration, but since I'm not sure I've understood every-
thing on the subject could someone please help me to get
an answer to the following questions:

1) Can I connect 2 x DEFZA-AA (installed on 2 x DEC 3000
   model 400 systems) in a point-to-point FDDI configura-
   tion within OpenVMS/AXP 6.1 (FDX option enabled by de-
   fault) ?

2) If yes, can the following configuration be a working
   configuration from an Ethernet transfer splitting 
   point of view?

             Fddi point-to-point  <---- used for Cluster 
             +------------------+       & Shadow data 
             |                  |       transfers only
     +---+---+------+  +---+----------+    
     |   | DEFZA-AA |  |   | DEFZA-AA |
     |   +----------+  |   +----------+
     |              |  |              |
     | DEC 3000/400 |  | DEC 3000/400 |
     |      Sys. A  |  |      Sys. B  |
     | OpenVMS 6.1  |  | OpenVMS 6.1  |
     |   +----------+  |   +----------+
     |   | DECLance |  |   | DECLance |
     +---+--+-------+  +---+--+-------+
            |                 |
            |                 |
  T---------+-----------------+-----T
     Ethernet Thin wire  <------------- used for all 
                                        other Ethernet
                                        data transfers

 Any help will be very appreciated.
 Thanks indeed in advance,

 Maurizio

    
    According to everything I know, .0 is correct for DEC 3000 systems
    only. However, I don't believe it's a DEFZA, but a DEFTA, where "T"
    stands for Turbochannel.
    
    Only TC FDDI have full duplex enabled by default.

It's REALLY 2 x DEFZA-AA point-to-point configuration.

DEFTA is the replacement for DEFZA, but since Customer
ordered a TC-Fddi controller more than one year ago He
got DEFZA modules.

Then, important questions are now the following:

- is DEFZA able to work in FDX ?

- and if Yes, is FDX option enabled by default?

- and if No, how can I enable FDX option?

Thanks again for any help.

Cheers, Maurizio

- is DEFZA able to work in FDX ?

  No.