[f-nsp] Unexpected CPU load on NetIron CER

Eldon Koyle esk-puck.nether.net at esk.cs.usu.edu
Mon Oct 20 11:32:32 EDT 2014


Are you using PIM or some other multicast routing, by chance?  We had
some nasty issues where even small amounts of multicast would send the
LP cpu to 50% on our MLX routers.  You might want to try the latest 5.5
release and see if that helps.

-- 
Eldon Koyle
-- 
The solution of problems is the most characteristic and peculiar sort
of voluntary thinking.
		-- William James

On  Oct 20 10:28+0200, Bardo Cornelissen wrote:
> Hi folks,
> 
>  
> 
> I have recently installed a NetIron CER 2024F-4X and at implementation I saw
> relatively high CPU levels when using "route-only" on specifically an 10G
> (AMS-IX Exchange) port. "sh cpu lp" showed values at around 50% and icmp
> traffic on the router ip showed packetloss. When I turn of "route-only" the
> cpu utilization drops to 9-10% and stays stable.
> 
>  
> 
> I still find these values high. We previously used an old jetcore router
> with the same settings and that had a stable 1% cpu-utilization. It feels
> some sort of traffic is causing load on the cpu but so far I've not been
> able to track down the issue. Has anyone seen similar behavior?
> 
>  
> 
> IronWare : Version 5.5.0cT183 Copyright (c) 1996-2013 Brocade Communications
> Systems, Inc.
> 
>  
> 
> #sh cpu lp
> 
>  
> 
> 10:27:24 GMT+01 Mon Oct 20 2014
> 
>  
> 
> SLOT  #:          LP CPU UTILIZATION in  %:
> 
>                in 1 second:  in 5 seconds:  in 60 seconds: in 300 seconds:
> 
>      1:        10            9              9               9
> 
>      2:        10            9              9               9
> 
>  
> 
> Kind regards,
> 
>  
> 
> Bardo Cornelissen
> 
>  
> 
> Caveo Internet BV
> 
>  <http://www.caveo.nl/> http://www.caveo.nl
> 

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