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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

652.0. "DEChub 900 configuration query?" by ARRODS::GILLJ (John, DTN 847-5849) Mon Jan 24 1994 11:28

Hi,

I have the following DEChub 900 LAN configuration.


     +-----------+				+-----------+
     | VAX       |				| VAX       |
     |load host  |				|load host  |
     +-----------+				+-----------+
       |	|  FOT				 |   |
       O FOT    +---O-----------+            FOT O   O FOT
       |                        |                |   |
       |   +-------------------------------------+   |
       |   |                    |                    |
       |   |                    +----------------+   |
       |   |                                     |   |
     +----------+				+----------+
     | D | D |  | Hub 1				| D | D |  | Hub 3
     | R | R |  |				| R | R |  |
     | 9 | 9 |  |				| 9 | 9 |  |
     | 0 | 0 |  |				| 0 | 0 |  |
     | F | F |  |				| F | F |  |
     | L | L |  |				| L | L |  |
     +----------+				+----------+
       |                                              |
       |                                              |
       |                                              |
       |                                              |
     +----------+				+----------+
     | D | D |  | Hub 2				| D | D |  | Hub 4
     | R | R |  |				| R | R |  |
     | 9 | 9 |  |				| 9 | 9 |  |
     | 0 | 0 |  |				| 0 | 0 |  |
     | F | F |  |				| F | F |  |
     | L | L |  |				| L | L |  |
     +----------+      Bridge/Router		+----------+
       |   |          +------------+              |   |
       |   +----------| DECNIS 500 |--------------+   |
       |              +------------+                  |
       O FOT                                          O FOT
       |                                              |
     +-----------+				+-----------+
     | DECnis 600|				| DECnis 600|
     +-----------+				+-----------+
 

The VAXes act as load hosts for the DECnis 600s and DECnis 500s.

My problem is that the DECnis 600 does not down-line load over the DEChub 
900s.  However if I connect the DECnis directly to the VAX load host it 
does load.

If I connect the DECnis directly to the VAX and load it.  Then re-connect 
it into my DEChub 900 LAN I can do VMS 'set host' and NCP loop operations.

My question is Have I exceeded the Ethernet repeater rule?  

I was led to believe that repeating using Fibre Optic repeaters was 0.5 
repeater hops.

Any help appreciated,

John
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