[c-nsp] 3550 high cpu & process switched traffic
Tassos Chatzithomaoglou
achatz at forthnet.gr
Fri Aug 18 14:00:44 EDT 2006
3550#sh proc cpu | exc 0.00
CPU utilization for five seconds: 93%/91%; one minute: 93%; five minutes: 93%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
20 4544896 123670508 36 0.57% 0.63% 0.62% 0 Vegas LED Proces
27 30048240 14764148 2035 0.40% 0.48% 0.45% 0 Vegas Statistics
33 4701728 12413685 378 0.08% 0.06% 0.07% 0 L3MD_STAT
35 919348 69239506 13 0.08% 0.07% 0.08% 0 VegasPM
36 11606324 9735382 1192 0.08% 0.14% 0.15% 0 VUR_MGR bg proce
39 30030680 110922911 270 0.40% 0.40% 0.40% 0 IP Input
90 813456 7361206 110 0.08% 0.04% 0.04% 0 CEF process
99 13504708 28875655 467 0.24% 0.10% 0.15% 0 OSPF Router
Of course, there isn't any debug running in the background...
omar parihuana wrote on 18/8/2006 20:42:
> Hi,
>
> There is something wrong.. I have a 3550 with near 100SVI and my CPU
> process not reach 20%
>
> ! omitted...
> !
> Vlan369 192.168.67.25 YES NVRAM up
> up
> Vlan372 unassigned YES NVRAM up
> up
> Vlan375 unassigned YES NVRAM down
> down
> Vlan381 unassigned YES NVRAM down
> down
> Vlan384 unassigned YES NVRAM down
> down
> Vlan385 unassigned YES NVRAM down
> down
> Vlan387 192.168.67.37 YES NVRAM up
> up
> Vlan388 192.168.66.65 YES NVRAM up
> up
> Vlan389 192.168.67.169 YES NVRAM up
> up
> Vlan390 unassigned YES NVRAM up
> up
> Vlan391 unassigned YES NVRAM down
> down
> Vlan392 192.168.66.85 YES NVRAM up
> up
> Vlan393 192.168.66.89 YES NVRAM up
> up
> Vlan394 192.168.67.129 YES NVRAM up
> up
> Vlan395 192.168.66.105 YES NVRAM up
> up
> Vlan396 192.168.67.101 YES NVRAM up
> up
> Vlan397 192.168.67.165 YES NVRAM up
> up
> Vlan398 unassigned YES NVRAM up
> up
> Vlan399 unassigned YES NVRAM up
> up
> Vlan400 192.168.68.5 YES NVRAM up
> up
> Vlan401 192.168.68.9 YES NVRAM up
> up
> Vlan402 unassigned YES NVRAM down
> down
> Vlan403 unassigned YES NVRAM up
> down
> Vlan404 unassigned YES NVRAM down
> down
> Vlan405 192.168.69.97 YES manual up
> up
> Vlan406 192.168.68.13 YES NVRAM up
> up
> Vlan407 unassigned YES NVRAM up
> up
> Vlan408 unassigned YES NVRAM up
> up
> Vlan409 unassigned YES NVRAM down
> down
> Vlan410 unassigned YES NVRAM up
> up
> Vlan411 unassigned YES NVRAM up
> up
> Vlan413 192.168.68.21 YES NVRAM up
> up
> Vlan414 unassigned YES NVRAM up
> up
> Vlan415 unassigned YES NVRAM down
> down
> Vlan416 unassigned YES NVRAM down
> down
> Vlan421 unassigned YES NVRAM up
> up
> Vlan422 192.168.69.17 YES NVRAM up
> up
> Vlan423 unassigned YES NVRAM up
> up
> Vlan424 unassigned YES NVRAM up
> up
> Vlan425 unassigned YES NVRAM up
> up
> Vlan426 192.168.68.193 YES NVRAM up
> up
> Vlan427 192.168.68.253 YES NVRAM up
> up
> Vlan428 192.168.69.89 YES NVRAM up
> up
> !
> ! ... and continue....
>
>
> switch-l3#sh processes cpu
> CPU utilization for five seconds: 10%/1%; one minute: 15%; five minutes:
> 11%
>
> Please give more details, all sh process cpu.. Did you try restart
> the switch, or maybe there are some background intensive CPU process
> (i,e. debugs...)
>
>
> Rgds.
>
> On 8/18/06, Tassos Chatzithomaoglou <achatz at forthnet.gr> 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
>> _______________________________________________
>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>
>
--
***************************************
Tassos Chatzithomaoglou
Network Design & Development Department
FORTHnet S.A.
<achatz at forthnet.gr>
***************************************
More information about the cisco-nsp
mailing list