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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

3298.0. "Power-fail config loss" by JOBURG::RYAN (There'll be days like this) Tue Feb 20 1996 09:09

Hi,

I've requested some detail, but let me field this so long.

Customers (multiple via VAR) have DECswitch 900EF, DEFBA152.
(apparently also on 900EE).

1)  Configure any port to backplane of hub 900
2) Power off hub
3) Power on hub
4) all backplane connections are lost.

I've been unable to get anymore info about the problem, although
I have requested HUBwatch before/during/after images, I ain't got
them yet.

In the meantime, is there some checklist I can get them to go through
to make sure they're not doing something stupid ?

\Ryan

PS, Am I the only support guy to get this all the time ? : -

customer: 'My system is broken, can you fix it for me ?'
loop
me:       'What are the symptoms, please give me some details ?'
customer: 'It's broken.'
goto loop
T.RTitleUserPersonal
Name		DateLines
3298.1STRWRS::KOCH_PIt never hurts to ask...Tue Feb 20 1996 09:1313
    
    Well, until we can verify that the customer is using the latest version
    of HUBwatch & firmware for all modules, all we can do is speculate.
    
    I've done this many times and it works fine. In order for this to work,
    it only works if the hub is powered down and up, not if the customer
    removes and inserts modules (even if into the same slots). In the next
    version of the hub firmware, you should be able to remove a module and
    if you replace the it with the same type of module, all connections
    will be restored. This will be controlled by a setting which allows you
    to enable/disable this feature.
    
    Yes, I've encountered "the loop" also...
3298.2NETCAD::DOODYMichael DoodyTue Feb 20 1996 11:1319
    Make sure you wait at least 15 seconds after any changes to the hub
    before the power is removed. It takes that long for the hub's
    configuration to be written to non-volatile memory.
    
    There were fixes included in MAM v4.1.0 that involved losing the
    configuration after power loss. Make sure they're up to at least that
    rev.
    
    >removes and inserts modules (even if into the same slots). In the next
    >version of the hub firmware, you should be able to remove a module and
    >if you replace the it with the same type of module, all connections
    >will be restored. This will be controlled by a setting which allows you
    >to enable/disable this feature.
    
    That works today for FDDI modules that are connected to the backplane.
    At this time, I'm not sure if we'll be able to fit it in for all other 
    modules in next release.
    
    -Mike
3298.3STRWRS::KOCH_PIt never hurts to ask...Tue Feb 20 1996 11:205
    
    Yes, Michael, I mis-spoke. It works for FDDI.
    
    I hope you can pull this in for this next release. It would be a really
    good feature to have.