[c-nsp] BGP/CPU usage 7600 SUP720-3BXL

[Kristian Larsson]

On Mon, Sep 12, 2005 at 02:03:55PM -0300, Noriega, Alejandro wrote:
> Hello folks,
> 		I looking for real world statistics about cisco 7600s
> with SUP720-3BXL receiving "n" full routing tables.
> 
> I have 2 7600 (7600_A and 7600_B) interconnected with a GEC acting as
> edge routers. The 7600_A have 6 BGP sessions and is receiving two full
> tables plus ~124000 prefixes from the 7600_B. The 7600_B have 7 BGP
> sessions and is receiving three full tables plus ~46000 from the 7600_A.
> 
> The cpu statistics taken via SNMP shows:
> 7600_A: 	cpu: 6%
> 7600_B: 	cpu: 6%
> 
> But the "show processes cpu history" in each of my 7600s shows:
> 
>      3535353535355353535354544454454545466355353836352527353655
>      3123315073911718081702428506808162808311383493295284357451
> 100                                                            
>  90                                                            
>  80                                             *              
>  70                                      *      *       *      
>  60                                     **    * * * *   * * ** 
>  50   * * * * * ** * * * * * ************* ** * * * * * * * ***
>  40   * * ******************************** ** * *** * * * *****
>  30  **********************************************************
>  20  **********************************************************
>  10  #############*#########################*##################
>     0....5....1....1....2....2....3....3....4....4....5....5....
>               0    5    0    5    0    5    0    5    0    5    
This seems like quite a lot...
> 
>                CPU% per minute (last 60 minutes)
>               * = maximum CPU%   # = average CPU%
but wait. # = average and if we take a look at the
graph you're not going over 10%
The * just says that during that minute (every
column is one minute) the CPU peaked at that
value.

This is nothing to worry about as it's perfectly
normal :)

Regards,
Kristian
> 	
> I know that this is caused for the BGP Scanner procces but how do I
> really know which is the limit of my boxes?
> 
> Thanks in advance.
> 
> Regards,
> Alejandro.
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