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High CPU on Cisco 4500 switch

I am having couple of Cisco 4500 switches running in VSS mode with IOS-XE Version 03.04.01.SG RELEASE SOFTWARE (fc3)

I am facing high CPU on both Core CPU on the switch , i am not able to detemine the exact problem. Please help me to understand whats the exact issue causing High CPU. I also observed that my OSPF neighbours also go down when there is High CPU , might be Hellp packets are getting dropped.

 

Core 0: CPU utilization for five seconds: 8%; one minute: 14%;  five minutes: 15%
Core 1: CPU utilization for five seconds: 95%; one minute: 85%;  five minutes: 83%
PID    Runtime(ms) Invoked  uSecs  5Sec     1Min     5Min     TTY   Process
8623   2245873     28634543 382    51.88    49.67    49.28    0     iosd
11946  701202      10255390 68     0.12     0.18     0.18     0     ffm
11409  283519      1944165  145    0.04     0.04     0.04     0     cpumemd
1      1018        883      1153   0.00     0.00     0.00     0     init
2      1           91       11     0.00     0.00     0.00     0     kthreadd
3      136         22434    6      0.00     0.00     0.00     0     migration/0
4      65          3413     19     0.00     0.00     0.00     0     ksoftirqd/0
5      140         24075    5      0.00     0.00     0.00     0     migration/1
6      39          3447     11     0.00     0.00     0.00     0     ksoftirqd/1
7      11973       591682   20     0.00     0.00     0.00     0     events/0
8      13473       600343   22     0.00     0.00     0.00     0     events/1
9      7           790      9      0.00     0.00     0.00     0     khelper
92     31          1322     23     0.00     0.00     0.00     0     kblockd/0
93     6           387      17     0.00     0.00     0.00     0     kblockd/1
106    1           51       26     0.00     0.00     0.00     0     khubd
109    0           23       0      0.00     0.00     0.00     0     kseriod
114    7           25       282    0.00     0.00     0.00     0     kmmcd
156    953         78149    12     0.00     0.00     0.00     0     pdflush
157    1           176      10     0.00     0.00     0.00     0     pdflush

 

 

 

switch#show platform cpu packet statistics

Executing the command on VSS member switch role = VSS Active, id = 1

 

RkGenericPacketMan:
Packet allocation failures: 0
Packet Buffer(SW Common) allocation failures: 0
Packet Buffer(SW ESMP) allocation failures: 0
Packet Buffer(SW EOBC) allocation failures: 0
Packet Buffer(SW SupToSup) allocation failures: 0

Packets Dropped In Processing Overall

Total                5 sec avg 1 min avg 5 min avg 1 hour avg
-------------------- --------- --------- --------- ----------
              349393         4         1         3          0

Packets Dropped In Processing by CPU event

Event             Total                5 sec avg 1 min avg 5 min avg 1 hour avg
----------------- -------------------- --------- --------- --------- ----------
Sa Miss                         347223         4         1         3          0
L2 Router                         1993         0         0         0          0
Input ACl Copy                      59         0         0         0          0
VS Mgmt                             30         0         0         0          0
Vs Tunnel Control                   64         0         0         0          0
Sw Packet w/ TxInfo                   24         0         0         0          0

Packets Dropped In Processing by Priority

Priority          Total                5 sec avg 1 min avg 5 min avg 1 hour avg
----------------- -------------------- --------- --------- --------- ----------
Unknown                          25975         0         0         0          0
Normal                              58         0         0         0          0
Medium                          323326         4         1         3          0
High                                 1         0         0         0          0
Crucial                             33         0         0         0          0

Packets Dropped In Processing by Reason

Reason             Total                5 sec avg 1 min avg 5 min avg 1 hour avg
------------------ -------------------- --------- --------- --------- ----------
NoPimPhyportMap                   23967         0         0         0          0
Tx Mode Drop                     323352         4         1         3          0
Qos Policer Drop                     24         0         0         0          0
Extra packet received on VSS-Standby                 1986         0         0         0          0
No Vsl port found                    10         0         0         0          0
L2 Ctrl Packet received as SA miss                   22         0         0         0          0
L3 Ctrl Packet copied to Standby                   32         0         0         0          0

Total packet queues 64

Packets Received by Packet Queue

Queue                  Total           5 sec avg 1 min avg 5 min avg 1 hour avg
---------------------- --------------- --------- --------- --------- ----------
Input ACL fwd(snooping)          762148        11         3         3          0
Vslp                            392192         0         0         0          0
Host Learning                   187415         0         0         0          0
L2 Control                    18150729        62        49        41         31
Input ACL log, unreach           93448         0         0         0          0
L3 Glean                        141578         0         0         0          0
Vs Mgmt                        1416702         6         1         2          1
L3 Receive                    72926075       769       925       536        307
Vs Tunnel Ctrl Pkt               40226         0         0         0          0
Ttl Expired                      21124         0         0         0          0
Vs Tunnel Data Pkt            50166294        96      1511       855        917
InputIf Fail                        15         0         0         0          0
Bfd                                  8         0         0         0          0
Adj SameIf Fail                 153072         1         0         0          0
L2 router to CPU, 7           35061823      3733      1688      1757       1554
L3 Fwd                       111064647      1603      2477      1487        816

Packets Dropped by Packet Queue

Queue                  Total           5 sec avg 1 min avg 5 min avg 1 hour avg
---------------------- --------------- --------- --------- --------- ----------
L3 Receive                         423         0         0         0          0
Vs Tunnel Data Pkt                1346         0         0         0          0
Adj SameIf Fail                    806         0         0         0          0
L2 router to CPU, 7            6128876         0         0         0        230
L3 Fwd                            7292         0         0         0          0

 

Executing the command on VSS member switch role = VSS Standby, id = 2

 

RkGenericPacketMan:
Packet allocation failures: 0
Packet Buffer(SW Common) allocation failures: 0
Packet Buffer(SW ESMP) allocation failures: 0
Packet Buffer(SW EOBC) allocation failures: 0
Packet Buffer(SW SupToSup) allocation failures: 0

Packets Dropped In Processing Overall

Total                5 sec avg 1 min avg 5 min avg 1 hour avg
-------------------- --------- --------- --------- ----------
               72483         0         0         0          0

Packets Dropped In Processing by CPU event

Event             Total                5 sec avg 1 min avg 5 min avg 1 hour avg
----------------- -------------------- --------- --------- --------- ----------
Vs Tunnel Control                72483         0         0         0          0

Packets Dropped In Processing by Priority

Priority          Total                5 sec avg 1 min avg 5 min avg 1 hour avg
----------------- -------------------
%Timer expired.

switch#- --------- --------- --------- ----------
Unknown                          32729         0         0         0          0
Medium                           39754         0         0         0          0

Packets Dropped In Processing by Reason

Reason             Total                5 sec avg 1 min avg 5 min avg 1 hour avg
------------------ -------------------- --------- --------- --------- ----------
L2 Ctrl Packet received as SA miss                32729         0         0         0          0
L3 Ctrl Packet copied to Standby                39754         0         0         0          0

Total packet queues 64

Packets Received by Packet Queue

Queue                  Total           5 sec avg 1 min avg 5 min avg 1 hour avg
---------------------- --------------- --------- --------- --------- ----------
Vslp                            391856         0         0         0          0
Host Learning                   267027         3         0         2          0
L2 Control                           1         0         0         0          0
Input ACL log, unreach           39754         0         0         0          0
Vs Mgmt                         945900         7         0         1          1
Vs Tunnel Ctrl Pkt            26712010        94        83        64         53
Ttl Expired                       1232         0         0         0          0
Vs Tunnel Data Pkt              387375         1         0         0          0
Bfd                                  4         0         0         0          0
L2 router to CPU, 7           49659705       139      1576       834        890

Packets Dropped by Packet Queue

Queue                  Total           5 sec avg 1 min avg 5 min avg 1 hour avg
---------------------- --------------- --------- --------- --------- ----------
L2 router to CPU, 7            3057300         6        11        14        126

 

 

 

 

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Duplicate posts.   Go here:

Duplicate posts.  

 

Go here:  https://supportforums.cisco.com/discussion/12240156/high-cpu-cisco-4500-switch

New Member

Hi Leo, Deleted duplicate

Hi Leo,

 

Deleted duplicate post. Can you please help me to solve high CPU issue ?

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