Conference netcad::hub_mgnt

> Is there a problem with the HUB and the DECswitch units losing 
> to the HUB LAN connections ?  

Depends on how old your firmware is.  Significant work was done
in this area in general for DMHUB versions 4.0.x and 4.1.  The
upgrade may solve the problem.

	Dotsie

	Hi,
	I have v4.1 DEChub 900MS firmware, but if I hot swapped the 
	DECswitch 900EF, the module looses the connections to the hub
	backplane. I have to reconfigure the DECswitch ports.
	
	For my customer this is a big problem.
	Any suggestion will be apreciated. 

	thanks 
	
	Monica Oriana
	

    Monica, 
    
    If "FDDI Auto Healing" is turned off (this is the default), the
    behavior you describe is expected and intended. This is true of 
    all modules.
    
    If "FDDI Auto Healing" is turned on, in order for an FDDI module's
    backplane configuration to be restored, it must be the same kind of
    module (same SysObjectId) and it must be part of an FDDI ring on the
    backplane. This is true of any FDDI module including the 900EF. If both
    FDDI port are directed out the front, it behaves like a non-FDDI module
    in respect to Auto Healing.
    
    Unfortunately, there is an added restriction where if you swap a
    DECbridge 900MX for a DECswitch 900EF (or vice versa)  it is treated as
    a different kind of module (they have different sysObjectId's) and the
    configuration if not restored.
    
    
    In a future version of the MAM, we will be including an "Auto Restore"
    capability that will work for all module types, regardless of their LAN
    affiliations. And the 900MX / 900EF will be treated as equivalent.
    
    -Mike
    

	
	Ciao Mike,

	if "FDDI Auto Healing" is turned on I'm able to save the connections
	of the modules with the Dual Ring internal to Hub, but I have to 
        reconfigure the connections of SM type. Is this a correct behaviour?
	And what about the ports with Ethernet internal to hub?

	thanks for your help. 

	Monica Oriana

	>but I have to reconfigure the connections of SM type.
    
    		Not sure what you mean here. If you have configured an FDDI
    	module with tree backplane connections ( S and M ) they will be
    	restored. They must be connected to another module on the 
    	backplane for this to work. Just the same as rings (A,B)
    
    	Ethernet ports on the DECbridge 900MX and DECswitch 900EF 
    	will be restored as well. Repeaters are not involved (til the next
    	release).

	
	Ciao,
	Thanks for your answer.
	Probablu I'm doing something wrong.

	I have configured my DEChub 900MS as following:
	slot 1: DECswitch 900EF with port 1 Dual Ring Internal to HUB
			             port 3 Ethernet internal to Hub connected 
		                            to Thinwire.
	slot 5: DEConcentrator 900MX with Dual Ring internal to HUB
	slot 7: DEConcentrator 900MX with S external and M internal to HUB
        slot 8: DECrepeater 90C

	FDDI Auto Healing Enable

	If I hot swap off the DECswitch  900 EF and then I reinsert the
	same module in the same slot, I can save the connection to Dual Ring
	but I loose the port 3 Ethernet connection of the DECswitch 900EF 
	and the M connection of the DEConcentrator 900MX.
	What is wrong?

	thanks again

	Monica

	>but I loose the port 3 Ethernet connection of the DECswitch 900EF 
    		This should work. Maybe you have found a bug. You said you
    		have v4.1 of the MAM FW. What is the switch + concentrator
    		FW versions? I will try to reproduce the problem.
    	
	>and the M connection of the DEConcentrator 900MX.

    		This M port is not connected to anything; so you have lost
    		nothing. To be restored it must be connected to an
    		S port of another module on the backplane.
    
    
    	Regards,
    	-Mike

	thanks a lot for your answer.

	I have installed the Bridge Router SW v1.0 (RouteAbout SW).
	
	thanks again

	ciao
	Monica