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Community Member

Cisco NAC 4.7 - kclick process - High CPU Usage

Once the CAS is added to the CAM this process uses 100% of the CPU on the CAS. I'm using the 3315 platform for the manager and a 3350 for the CAS.

top - 13:03:21 up 8 min,  1 user,  load average: 1.27, 1.06, 0.56
Tasks:  71 total,   3 running,  68 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.3%us, 53.2%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi, 46.5%si,  0.0%st
Mem:   1943428k total,   865304k used,  1078124k free,   635956k buffers
Swap:  4192956k total,        0k used,  4192956k free,   118224k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                               
3076 root      25   0     0    0    0 R 99.9  0.0   6:35.33 kclick

Any idea if this is normal?

5 REPLIES

Re: Cisco NAC 4.7 - kclick process - High CPU Usage

Hello,

That is normal and expected.

HTH,

Faisal

Community Member

Re: Cisco NAC 4.7 - kclick process - High CPU Usage

Can you tell me what this process is for?

Re: Cisco NAC 4.7 - kclick process - High CPU Usage

Hello,

CAS uses the click router to do it's NAC magic. In pre-4.7 versions it didn't use up the whole CPU, but in this latest iteration, it does the CPU slicing for any process that might need CPU attention also. If you see any other process than kclick taking large amount of CPU time, I'd take a close look at it, but for this process it's expected.

HTH,

Faisal

Community Member

Re: Cisco NAC 4.7 - kclick process - High CPU Usage

Interesting method - I'm sure the datacentre will be complaining about a rise in ambient heat. :-)

Community Member

Re: Cisco NAC 4.7 - kclick process - High CPU Usage

I have the same problem,

In the morning,all employees just came to the company,at this time,there will be a lot of requests for verification to NAS.

Often kclick process 100% of the phenomenon, leading to the terminal can not be verified.

-----------------------------------------------------------------------------------------------------------------------------------

[root@CAS1 ~]# sar 2 100

Linux 2.6.18-cisco.nac.1 (CAS1)         11/08/2011

08:55:50 AM       CPU     %user     %nice   %system   %iowait   %steal     %idle

08:55:52 AM       all     0.00     0.00   100.00     0.00     0.00     0.00

08:55:54 AM       all     0.00     0.00   100.00     0.00     0.00     0.00

08:55:56 AM       all     0.50     0.00     99.50     0.00     0.00     0.00

08:55:58 AM       all     0.00     0.00   100.00     0.00     0.00     0.00

08:56:00 AM       all     0.00     0.00   100.00     0.00     0.00     0.00

08:56:02 AM       all     0.50     0.00     99.50     0.00     0.00     0.00

-----------------------------------------------------------------------------------------------------------------------------------

PID USER     PR NI VIRT RES SHR S %CPU %MEM   TIME+ COMMAND

2225 root     25   0     0   0   0 R 99.9 0.0   9775:52 kclick

2435 root     21   0 1229m 134m 8492 S 0.3 7.1 58:33.43 java

30882 root     -2   0 4932 4932 2012 S 0.3 0.3   6:27.78 heartbeat

   1 root     15   0 2064 624 536 S 0.0 0.0   0:00.57 init

   2 root     34 19     0   0   0 S 0.0 0.0   0:00.01 ksoftirqd/0

   3 root     RT -5     0   0   0 S 0.0 0.0   0:00.00 watchdog/0

-----------------------------------------------------------------------------------------------------------------------------------

[root@CAS1 ~]# netstat -an | grep 10.128.17

tcp       0     0 10.128.15.2:443             10.128.17.247:1258         FIN_WAIT2

tcp       0     30 10.128.15.2:443             10.128.17.139:2194         FIN_WAIT1

tcp       0     0 10.128.15.1:80             10.128.17.217:1742         TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.217:1743         TIME_WAIT

tcp       0     30 10.128.15.2:443             10.128.17.28:2058           FIN_WAIT1

tcp       0     0 10.128.15.1:80             10.128.17.242:1530         TIME_WAIT

tcp       0     38 10.128.15.2:443             10.128.17.29:49440         FIN_WAIT1

tcp       0     0 10.128.15.1:80             10.128.17.24:1067           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.24:1066           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.175:2184         TIME_WAIT

tcp       0     0 10.128.15.2:80             10.128.17.66:1805           FIN_WAIT2

tcp       0     0 10.128.15.1:80             10.128.17.70:1536           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.70:1539           TIME_WAIT

tcp       0     30 10.128.15.2:443             10.128.17.121:1343         FIN_WAIT1

tcp       0     0 10.128.15.1:80             10.128.17.70:1540           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.70:1542           TIME_WAIT

tcp       0     38 10.128.15.2:443             10.128.17.76:62769         FIN_WAIT1

tcp       0     38 10.128.15.2:443             10.128.17.76:62771         FIN_WAIT1

tcp       0     38 10.128.15.2:443             10.128.17.76:62770         FIN_WAIT1

tcp       0     0 10.128.15.1:80             10.128.17.69:1065           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.93:1079           TIME_WAIT

tcp       0     0 10.128.15.2:80             10.128.17.76:62758          FIN_WAIT2

tcp       0     0 10.128.15.1:80             10.128.17.69:1059           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.93:1083           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.93:1081          TIME_WAIT

tcp       0     0 10.128.15.1:443             10.128.17.93:1087           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.69:1060           TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.93:1085          TIME_WAIT

tcp       0     0 10.128.15.2:80             10.128.17.179:1596         ESTABLISHED

tcp       0     0 10.128.15.2:80             10.128.17.70:1530           FIN_WAIT2

tcp       0     0 10.128.15.1:80             10.128.17.70:1534           TIME_WAIT

tcp       0     38 10.128.15.2:443             10.128.17.238:49231         FIN_WAIT1

tcp       0     0 10.128.15.1:80             10.128.17.149:1370         TIME_WAIT

tcp       0     38 10.128.15.2:443             10.128.17.169:49252         FIN_WAIT1

tcp       0     0 10.128.15.1:80             10.128.17.149:1368         TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.149:1372         TIME_WAIT

tcp       0      0 10.128.15.1:80             10.128.17.158:1369         TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.158:1368         TIME_WAIT

tcp       0     1 10.128.15.1:80             10.128.17.104:1710         FIN_WAIT1

tcp       0      0 10.128.15.1:80             10.128.17.158:1371         TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.158:1370         TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.149:1366         TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.158:1373         TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.158:1372         TIME_WAIT

tcp       0     0 10.128.15.1:80             10.128.17.158:1375         TIME_WAIT

tcp      0     0 10.128.15.1:80             10.128.17.158:1374         TIME_WAIT

tcp       0     30 10.128.15.1:8905           10.128.17.214:1544         FIN_WAIT1

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