Conference netcad::hub_mgnt

    
    If you hot-swap a module, any backplane configuration for that module
    is deleted.
    
    Your second problem is less clear - could you please describe the
    configuration in detail before and after the problem occured -
    including where on the network your PC is and which modules are the IP
    servers in each hub.

            Sorry, more info:
            
            Eight DEChub 900 (1 x DECrepeater + 1 x DECbridge 900 each) 
            forming a dual ring FDDI configuration. DECbridges are the IP
            servers in each hub.
            
            HUBwatch running on a PC connected to a port on one of this 
            repeaters. I can ping to all hubs successfully, and HUBwatch 
            connects with all bridges.
            
            If I open the FDDI ring (i.e. to hot-swap one of the 
            DECbridges) I lose the IP connection from HUBwatch. From DOS 
            I can't ping to any hub. I must power off then on each hub to 
            ping successfully from the PC. Is this a normal behaviour?
            
            Jos�
            

I Have one similar problem,

I have one HUB with FDDI, 2 Bridges and one Concentrator:


External	A						B
	DECswitch 900		Concentrator		DECswitch 900

Internal	B ---------------- A    B --------------- A


I configure DECswitch 1 with A - outside B - inside port (TRUNK B). DECconcentrator with A and B 
inside ( TRUNK AB ) and the second DECswitch with A - inside B - outside (TRUNK A).
 
When I remove the concentrator ( hot swapped), Hubwatch detect that one module has been removed, but 
the FDDI ring will not wrap per the FDDI standard, so the DECswitch also lost its configuration and 
I lost the FDDI ring inside the HUB.

If I have the following configuration in LAN interconect:

		    A				   B
		DECSWitch	Concentrator   DECswitch
FDDI LAN      =====*B*=============*AB*===========*A*=============


When I remove the concentrator it appears like:

		    A		   B
		DECSwitch	DECswitch
		    |		    | A  ( no conection )   and when i see the port it look like
		    |					AB outside.
		  B |	
FDDI LAN    ==========================================



I thought that when we remove one module from the HUB, the RING will autoconfigure itseft, but that 
doesn't happen.

Some times I must do a REFRES in hubwatch to see the DECswitch again, Polling is ON, because it 
fails.

.3 (wrapped)
            <<< NETCAD::KALI$USER3:[NOTES$LIBRARY]HUB_MGNT.NOTE;1 >>>
                   -< DEChub/HUBwatch/PROBEwatch CONFERENCE >-
================================================================================
Note 1894.3         Problems hot-swapping DECmultiswitch 900              3 of 3
ISIDRO::65035::Julio-Vazquez                         42 lines  17-JAN-1995 09:26
                       -< FDDI ring doesn't WRAP itself >-
--------------------------------------------------------------------------------
I Have one similar problem,

I have one HUB with FDDI, 2 Bridges and one Concentrator:


External	A						B
	DECswitch 900		Concentrator		DECswitch 900

Internal	B ---------------- A    B --------------- A


I configure DECswitch 1 with A - outside B - inside port (TRUNK B). 
DECconcentrator with A and B 
inside ( TRUNK AB ) and the second DECswitch with A - inside B - outside 
(TRUNK A).
 
When I remove the concentrator ( hot swapped), Hubwatch detect that one 
module has been removed, but 
the FDDI ring will not wrap per the FDDI standard, so the DECswitch also 
lost its configuration and 
I lost the FDDI ring inside the HUB.

If I have the following configuration in LAN interconect:

		    A				   B
		DECSWitch	Concentrator   DECswitch
FDDI LAN      =====*B*=============*AB*===========*A*=============


When I remove the concentrator it appears like:

		    A		   B
		DECSwitch	DECswitch
		    |		    | A  ( no conection )   and when i see 
		    |					  the port it look like
		    |					AB outside.
		  B |	
FDDI LAN    ==========================================
                                                          


I thought that when we remove one module from the HUB, the RING will 
autoconfigure itseft, but that 
doesn't happen.

Some times I must do a REFRES in hubwatch to see the DECswitch again, Polling 
is ON, because it 
fails.

    

    Hi,
    
    I have a similar config but no problem found. I have about ten 
    DECHub 900, each one have one DECbridge 900MX and three to four
    DECrepeater 900TM or DECserver 900TM. Through DEChub are connected 
    and form DAS FDDI ring. I can remove/hot-swap any one of the DECbridge
    without effecting the network. 
    
    My DECbridge 900MX firmware is V1.4. Have you check your connection 
    and configuration ?
    
    Good Luck.
    
    David.
    HKMCS.
       
    

    
	I tried the following two configs. Disconnecting the concentrator 
	resulted in an intact FDDI IMB between the two bridges/switches. 

    
                ------------------------------------------------
		|                                               |
External	A						B
	DECswitch 900		Concentrator		DECswitch 900
Internal	B ---------------- A    B --------------- A




           (no connection)				  (no connection)
External	A						B
	DECswitch 900		Concentrator		DECswitch 900

Internal	B ---------------- A    B --------------- A
                                                                        

MAM 3.1
DEFBA 1.4
DEF6X 2.8
HUBwatch for OSF/1 X3.1.59

Bill Wade
Network Product Support

    

Thank you

There was the firmware.

Now all work properly.