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New Member

High CPU Utilization in Catalyst 6509 VSS

Hi,

The CPU utilization of my Catalyst 6509 VSS switch ( up to 20% or higher ) was always higher than other Catalyst 6509 non VSS switch. The show proc cpu sort are A/F. The IOS version is 12.2(33)SXI4a. Is there any suggestion for the VSS high CPU utilization?

Best Regards,

6509-VSS#sh proc cpu sort

CPU utilization for five seconds: 20%/10%; one minute: 17%; five minutes: 18%

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

293   180677272 576311141        313  2.79%  2.58%  2.63%   0 Earl NDE Task   

  23   1238395721092969687        113  2.55%  1.22%  1.20%   0 IPC Seat Manager

537   137203248 710311815        193  0.95%  1.44%  1.46%   0 Port manager per

308     8875732  38978030        227  0.55%  0.48%  0.47%   0 CDP Protocol    

  11    22352240  40970620        545  0.47%  0.20%  0.20%   0 ARP Input       

314    38472656 287310225        133  0.39%  0.43%  0.40%   0 IP Input        

504     4765340  73348487         64  0.15%  0.10%  0.10%   0 RPC online_diag_

133          36       207        173  0.15%  0.03%  0.00%   1 Virtual Exec    

403     4744372  13696576        346  0.15%  0.16%  0.15%   0 CEF: IPv4 proces

604      621880 551345900          1  0.15%  0.08%  0.08%   0 HSRP Common     

341      5993161121847645          0  0.15%  0.13%  0.15%   0 Ethernet Msec Ti

316    11340988  98860214        114  0.15%  0.07%  0.08%   0 ADJ resolve proc

  50     1338496   9198605        145  0.15%  0.11%  0.13%   0 Per-Second Jobs 

383      432600    228133       1896  0.07%  0.00%  0.00%   0 XDR mcast       

  59    10383804 361448183         28  0.07%  0.10%  0.10%   0 VSIBC process   

120     3982420   4153256        958  0.07%  0.06%  0.07%   0 IPC LC Message H

536      151488 124223423          1  0.07%  0.02%  0.02%   0 PM Callback     

424     1738732   4471794        388  0.07%  0.03%  0.04%   0 HIDDEN VLAN Proc

416       84492  10509171          8  0.07%  0.00%  0.00%   0 FM core         

606     1899852  37997617         49  0.07%  0.05%  0.05%   0 OSPF-1 Hello    

135       85228  89567322          0  0.07%  0.01%  0.00%   0 Mwheel Process  

322      416756   9138950         45  0.07%  0.00%  0.00%   0 Spanning Tree   

445      193604 277199712          0  0.07%  0.03%  0.02%   0 RADIUS          

282      199000 277469935          0  0.07%  0.03%  0.02%   0 ACE Tunnel Task 

  24           0         1          0  0.00%  0.00%  0.00%   0 IPC Session Serv

   6           0         1          0  0.00%  0.00%  0.00%   0 PF Redun ICC Req

  22           0         1          0  0.00%  0.00%  0.00%   0 IPC Process leve

  21       12848   8937247          1  0.00%  0.00%  0.00%   0 IPC Deferred Por

  25           0         1          0  0.00%  0.00%  0.00%   0 IPC Stdby Update

  26         756    894349          0  0.00%  0.00%  0.00%   0 Compute SRP rate

  31           0         1          0  0.00%  0.00%  0.00%   0 Crash writer    

  27           0         2          0  0.00%  0.00%  0.00%   0 DDR Timers      

  33          20        60        333  0.00%  0.00%  0.00%   0 OBFL Cfg Dispatc

  28           0         2          0  0.00%  0.00%  0.00%   0 Dialer event    

  20      552748   8938985         61  0.00%  0.06%  0.07%   0 IPC Periodic Tim

  36          12        41        292  0.00%  0.00%  0.00%   0 rf proxy message

  37          12         6       2000  0.00%  0.00%  0.00%   0 client_entity_se

  19           0       166          0  0.00%  0.00%  0.00%   0 PF_Split Sync Pr

  29         140        37       3783  0.00%  0.00%  0.00%   0 ifIndex Receive 

  30           0         2          0  0.00%  0.00%  0.00%   0 Serial Backgroun

  32     2330020  11145258        209  0.00%  0.03%  0.00%   0 EnvMon          

  42           0        64          0  0.00%  0.00%  0.00%   0 Cat6k SNMP Trap 

  43           0         1          0  0.00%  0.00%  0.00%   0 ARP Snoop       

  44       18108   8937239          2  0.00%  0.00%  0.00%   0 Dynamic ARP Ins

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

High CPU Utilization in Catalyst 6509 VSS

yes,I have meet this case in my network...

So,see your output,the first process is "NDE",I think it will be:

1.Do you enable the NETFLOW?

2.Do you enable the Netflow export,the Netflow Export just is NDE

The Netflow will collect the traffic info,like source-ip destination-ip ports and bytes by each flow.

And the Netflow Export will put these traffic info to a server, the server will log these info and  analysis them.

Each Netflow Export packet encapsulated by CPU,so if you enable Netflow and enable NF-Export,your CPU will more higher.

5 REPLIES
New Member

High CPU Utilization in Catalyst 6509 VSS

yes,I have meet this case in my network...

So,see your output,the first process is "NDE",I think it will be:

1.Do you enable the NETFLOW?

2.Do you enable the Netflow export,the Netflow Export just is NDE

The Netflow will collect the traffic info,like source-ip destination-ip ports and bytes by each flow.

And the Netflow Export will put these traffic info to a server, the server will log these info and  analysis them.

Each Netflow Export packet encapsulated by CPU,so if you enable Netflow and enable NF-Export,your CPU will more higher.

New Member

High CPU Utilization in Catalyst 6509 VSS

Hi,

Yes, I have enable netflow & NDE export. Is it possible to modify netflow & NDE export configuration ( but still enable it ) to decrease the CPU utilization?

Best Regards,

New Member

Re: High CPU Utilization in Catalyst 6509 VSS

Cisco Employee

Re: High CPU Utilization in Catalyst 6509 VSS

Just curious,  are you considering 20% high cpu? This would be pretty expected, and actually quite low vs some production networks I've seen.

6509-VSS#sh proc cpu sort

CPU utilization for five seconds: 20%/10%; one minute: 17%; five minutes: 18% <<<<

New Member

Re: High CPU Utilization in Catalyst 6509 VSS

Hi,

The cpu utilization for other non VSS Catalyst 6509 switch ( also enable netflow & NDE export ) is below 10%, but this VSS switch is 20% and higher, and we will install more distirbute and access switch under the VSS core switch, so we are worry the CPU utillization and switch performance...

Best Regards,

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