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

Noriega, Alejandro ANoriega at prima.com.ar
Mon Sep 12 13:03:55 EDT 2005


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    

               CPU% per minute (last 60 minutes)
              * = maximum CPU%   # = average CPU%
	
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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