[c-nsp] Adding a SUP720-3BXL standby SUP question

[Tony]

We've only ever had ONE bus stall when replacing a SUP (this was replacing a failed one, not upgrading from single to dual). As a result we always schedule this sort of activity in a maintenace window and plan for the worst (ie. box reboot & 5-10 mins of downtime).


regards,
Tony.




----- Original Message -----
> From: Andrew K. <andrew at vianet.ca>
> To: cisco-nsp at puck.nether.net
> Cc: 
> Sent: Thursday, 5 April 2012 10:02 AM
> Subject: Re: [c-nsp] Adding a SUP720-3BXL standby SUP question
> 
> I've attempted this before and failed, this was with a 7606 running SRE5.
> 
> The bootvar is the spare sup720 I was adding was set to boot from the 
> bootflash, and not the CF disk.
> 
> When I inserted the card it loaded the bootflash IOS (which was from a 
> totally different train).
> 
> After this the box promptly crashed, I imagine its because the slave-sup 
> was attempting to SSO.
> 
> Since then I keep a console on the new slave as I insert it and if I see 
> it loading the incorrect ISO I break into ROMMON.
> 
> Just my experience, wanted to share.
> 
> 
> On 4/4/2012 5:58 PM, Brian Wallingford wrote:
>>  I wouldn't go that far unless you've got a use for an additional 
> chassis.
>>  Simply put the compact flash from the new 3bxl into the primary's 2nd
>>  slot, copy the image&  return it to the new card if you're nervous.
>>  Either way, insterting a new sup should not interfere with the primary.
>> 
>>  On Wed, 4 Apr 2012, Lee Starnes wrote:
>> 
>>>  I had figured as much, but wanted to make sure. I have backups of
>>>  everything, so if something does go wrong, it can get corrected. We may
>>>  just pick up a spare chassis to do this upgrade. Seems that they are 
> not
>>>  too costly.
>>> 
>>>  Thanks for the input.
>>> 
>>>  -Lee
>>> 
>>>  2012/4/4 Piotr Wojciechowski<peper at peper.eu.org>
>>> 
>>>>  On 4/4/12 22:14 , Lee Starnes wrote:
>>>>>  Hi,
>>>>> 
>>>>>  I have a question about the 6509 and the SUP720-3BXL standby 
> sup. If a
>>>>>  chassis only has 1 SUP installed and you install a second one, 
> will that
>>>>>  disrupt the currently installed and working SUP? I ask this 
> because we
>>>>  have
>>>>>  our standby SUPs and I would like to install them, but I know 
> they don't
>>>>>  have the same version of IOS running. I don't want to blow 
> away the
>>>>  config
>>>>>  or cause the chassis to go down when installing these. Does 
> anyone have
>>>>  any
>>>>>  experience with this?
>>>>> 
>>>>  Hi,
>>>> 
>>>>  Normally when you insert second sup as a standby (same type, 
> hardware
>>>>  configuration including PFC and memory) it should synchronize 
> itself to
>>>>  active one including IOS and configuration (except configuration
>>>>  registers) and reload as standby. But I normally recommend my 
> customers
>>>>  to manually load proper IOS to supervisor on spare chassis and 
> insert
>>>>  prepared one into production chassis.
>>>> 
>>>>  Regards,
>>>> 
>>>>  --
>>>>  Piotr Wojciechowski  (CCIE #25543)