Conference netcad::hub_mgnt

1792.0. "hot swap of modules and quick replay of configuration" by TLSE10::SELLES (Pierre-Jean - Toulouse -France) Fri Dec 16 1994 14:15

	regarding any hot-swap of modules in a dechub900 with 
the existing firmware and hubwatch releases , we know that , with the hub
running , the module interconnect has to be replayed "by hand" by a human
operator ; 

	with a customer ( the same as in note 1614 ) , we have imagined 
some scenarii that could happen , in fact , for any customer :

1 - we remove a module ( lets say FDDI , but could be any other ) lets say 
for replacing a failed PMD , and then we plug it again in the same slot :

	if the MAM was able to retain somewhere an info of the kind 
	( slot , module type , MAc address of the module ) , then 
	it could consider that it can "automatically" replay the 
	interconnect , the module having retained its own parameters 

	and so no "human" intervention would be needed in this case 

2- now the module has failed , so we remove it by another with a different
MAc address but of the same type ; if the inside parameters have already been
done ( this module was keeped on a shelf for quick replacement ) , 
then the MAM could also decide to replay the same interconnect 

	and no human intervention required 



3 - now considering the backup/restore functionnality which should be 
available for next release of hubwatch , the customer asked if the 
following is going to be possible :

	SAVE/RESTORE of a module parameters ( in French "a la TSM", or 
	TSM-like where you have a config file that can be played 
	on an existing module or a new module )

	SAVE/restore of ONE module interconnect ( that is , per slot )

	SAVE/restore of the whole LAn interconnect ; 
	
	SAVE/restore of the HUB manager itself 



	thanks for your enlightment about this features 	



PS : i know , the customer is getting paranoid ; but , they told me : imagine
a whole airport no able to let any plane get up in a little cold morning 
because the whole airport staff is waiting for an operator to correctly 
parameter and connect an fddi module for replacement ?

All the following answers should be prefixed by a "maybe"...

.0:	SAVE/RESTORE of a module parameters ( in French "a la TSM", or 
	TSM-like where you have a config file that can be played 
	on an existing module or a new module )

module-by-module, agent-by-agent.

.0:	SAVE/restore of ONE module interconnect ( that is , per slot )

No.  It's all a big ball o' wax.

.0:	SAVE/restore of the whole LAn interconnect ; 

Yes.
	
.0:	SAVE/restore of the HUB manager itself 

Yes.


Tom Hood
Almost on vacation