[c-nsp] 3550 high cpu & process switched traffic

[Rodney Dunn]

Something is wrong.

What is the config?

I'm not too good with the 3550 as that is a L3 capable switch.

But usually it's a feature of some sort configured causing it.

On Fri, Aug 18, 2006 at 07:44:36PM +0300, Tassos Chatzithomaoglou wrote:
> I have a 3550 (12.1(22)EA8) which is constantly showing high cpu usage :
> 
> 3550#sh proc cpu
> CPU utilization for five seconds: 99%/96%; one minute: 97%; five minutes: 97%
> 
> If i'm not wrong, most of it is due to interrupts and i'm trying to find out what exactly is causing 
> this. The 3550 has 3 SVIs (1 for management), 6 routed interfaces (5 of them have mls qos 
> configured) and 2 L2 interfaces (one is trunk).
> 
> Also I would like to ask if the following output (only processor used for eggress traffic on ALL 
> interfaces) is considered normal for 3550 switches:
> 
> 3550#sh int stats
> Vlan1
>            Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                 Processor        179      12172        179      10740
>               Route cache          0          0          0          0
>                     Total        179      12172        179      10740
> Vlan4
>            Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                 Processor       2806     179584       2806     168360
>               Route cache       8295     581139          0          0
>                     Total      11101     760723       2806     168360
> Vlan10
>            Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                 Processor   21993427 2785897656   20910415 2025707486
>               Route cache 2289603255 1233480520          0          0
>                     Total 2311596682 4019378176   20910415 2025707486
> Interface FastEthernet0/1 is disabled
> 
> FastEthernet0/2
>            Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                 Processor          0          0     718962  112668280
>               Route cache          0          0          0          0
>                     Total          0          0     718962  112668280
> FastEthernet0/3
>            Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                 Processor      98405    6710609     535543   50002650
>               Route cache 2288708113 1141208459          0          0
>                     Total 2288806518 1147919068     535543   50002650
> FastEthernet0/4
>            Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                 Processor      89343   11874108  396765671 2089412449
>               Route cache  543340008 1149008067          0          0
>                     Total  543429351 1160882175  396765671 2089412449
> 
> ....
> 
> 
> "sh int switching" shows the same problem for all interfaces : The Fast path has 0 entries for all 
> protocols including IP.
> 
> Regards,
> Tassos
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