[c-nsp] Cisco 6k no power enable module

[Tony Varriale]

On 12/1/2011 3:52 PM, Mark Mason wrote:
> We also just labbed a VS-S720-10G running 122-33.SXJ1 and were able to shut a slot down without a module installed. Unfortunately we ALSO were able to incorrectly install a WS-X6748-GE-TX and cause the 3 second bus disruption. Anyone else run into this?
>
> 6509-v-e-test(config)#no power enable module 6
> %FRU Absent. Power admin state updated
> 6509-v-e-test(config)#no power enable module 6
> % slot is already disabled and not yet enabled
> 6509-v-e-test(config)#no power enable module 7
> %FRU Absent. Power admin state updated
> 6509-v-e-test(config)#no power enable module 7
> % slot is already disabled and not yet enabled
> 6509-v-e-test(config)#no power enable module 8
> %FRU Absent. Power admin state updated
> 6509-v-e-test(config)#no power enable module 8
> % slot is already disabled and not yet enabled
> 6509-v-e-test(config)#no power enable module 9
> %FRU Absent. Power admin state updated
> 6509-v-e-test(config)#
> 6509-v-e-test(config)#no power enable module 9
> % slot is already disabled and not yet enabled
> 6509-v-e-test(config)#
> *Dec  1 21:14:36.304: %C6KPWR-SP-4-DISABLED: power to module in slot 8 set off (admin request)
> 6509-v-e-test(config)#
> *Dec  1 21:15:07.123: %OIR-SP-6-REMCARD: Card removed from slot 8, interfaces disabled
> *Dec  1 21:15:11.027: %C6KERRDETECT-SP-2-SWBUSSTALL: The switching bus is experiencing stall for 3 seconds
> *Dec  1 21:15:16.063: %C6KERRDETECT-SP-2-SWBUSSTALL_RECOVERED: The switching bus stall is recovered and data traffic switching continues
> *Dec  1 21:15:18.283: %C6KPWR-SP-4-DISABLED: power to module in slot 8 set off (admin request)
>
>
> Mark
>
> From: Mark Mason
> Sent: Thursday, December 01, 2011 2:38 PM
> To: 'cisco-nsp at puck.nether.net'
> Subject: Cisco 6k no power enable module
>
> Anyone know why Cisco doesn't allow for you to shut power down to a slot/module unless a FRU is installed in it? We can reproduce 100% multiple times in the lab WS-X6748-GE-TX installation's that causes the bus to stall 3 seconds. It has to do with the force you apply to the card during installation.
>
> %C6KERRDETECT-SP-2-SWBUSSTALL: The switching bus is experiencing stall for 3 seconds
> %C6KERRDETECT-SP-2-SWBUSSTALL_RECOVERED: The switching bus stall is recovered and data traffic switching continues
>
>
> Router(config)#no power enable module 8
> %FRU Absent. Power admin state updated
>
>
> Mark
The bus stall HAS to occur (and will occur) as to not corrupt data on 
insert and removal.  This is why it is imperative that a) you do this 
during maintenance windows b) use DFCs.

You may not get the message all the time but it still occurs.  So, I 
would say you installed in correctly.  If you would have installed it 
incorrectly, the box would have crashed.

As for powering down a slot with no card, I never tried that.  
Interesting :)

tv