Conference netcad::hub_mgnt

    It depends on what you mean by its "configuration".
    
    It is safe to assume all 900 max modules save some configuration in
    NVRAM (flash is usually for the firmware). The kinds of things stored
    in the module's NVRAM are its IP address, trap addresses, netmask, 
    port address filters, and internal LAN port groupings in the case of a
    PortSwitch repeater.
    
    When a module is installed in a DEChub 900MS, it is the Hub that stores
    the backplane configuration - which LANS are defined, what ports are
    connected to what LANs, what is the LIGO set (like ethernet-front).
    Now, this Hub configuration is stored in the Hub's NVRAM so that it
    will survive power failures and such. However, the hub-related
    configuration is deleted when the module is removed from the Hub while
    the Hub is running. Except in the case of FDDI modules when FDDI
    Auto-Healing is enabled. We're working to improve this for a future
    release.
    
    -Mike

For products available today, the answer is yes ONLY
if the customer uses clearVISN Resilience to save
entire hub configurations onto disk.

Other than that, the answer is no.

Module configurations will survive a power down or a
reset of any module or of the MAM, or both.  Most
module configurations are not currently saved over
removal/insertion (but see auto-healing below).

Anything entered via the Setup console will be saved in
NVRAM and survives with the module, even if you stick in
on a shelf for a year and insert it in a different hub.
What other information is saved in NVRAM depends on the
module. 

For information entered via Hubwatch, the best way to 
save it is with the new clearVISN Resilience product
(which is even harder to spell than to pronounce).  That
will save the configuration of an entire hub onto disk,
and you can reload a hub with that config at a later
time.  This only has 'hub granularity', though.  You 
can't save and restore just the PORTswitch900CP in slot 3.

FDDI modules, and the DECswith900EF when using the FDDI 
port, can also make use of Auto-Healing.  If you remove
one of these modules, its LAN Interconnect configuration
is remembered and restored when a module of the same
type is reinserted.

For other modules, any information entered via the
LAN Interconnect display is not saved, including
the Ligo front/back states.  There is probably other
info that doesn't survive, also, like port settings
on older 90 repeaters.

	Dotsie

 

    
> For information entered via Hubwatch, the best way to save it is with the
> new clearVISN Resilience product ... That will save the configuration of an 
> entire hub onto disk, and you can reload a hub with that config at a later
> time.  This only has 'hub granularity', though.  You can't save and restore 
> just the PORTswitch900CP in slot 3.
    
    Just a clarification of the above comment from .-1...
    
    clearVISN Resilience _can_ save/restore the configuration of a single 
    _module's_ settings.  However, backplane configuration, (stored in the
    hub), is saved/restored on an entire hub900 basis;  (i.e. the hub 
    backplane configuration you save can only be restored to a hub that has 
    the same types of modules in exactly the same slots).  It is not
    possible to save/restore a specific module's hub backplane connections.
                                                                  Carl.
    

    Thanks.
    

    Note that "reset to factory" option in HUBwatch does not always seem to
    do that....i.e. I still end up with connections pointed to the
    backplane when in a hub.
    
    We do need a paragraph in each modules user manual which describes
    EXPLICITELY what is and is not reset when things are reset.  Right now,
    it's a crap shoot.  
    
    Regards,
    j
    

    
    I have a customer with a similar question specifically on a 900GM.
    They want to know if a 900GM dies and must be replaced w/ one from
    the box, can they use TSM to upload the config. from the old 900GM?
    
    If so, is there a TSM version that supports the 32 ports?
    
    Forgive my ignorance on the TSM product, but I know nothing about
    it and am simply requesting info for the customer.
    
    Any assistance would be greatly appreciated.
    
    Thanks,
    Ed Gallagher

    TSM 2.1 supports the 900gm. -noted::tsm note 641