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cisco switch WS-C3750X-48T cpu utilization issue

Unanswered Question
Jan 26th, 2014
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Hi All,


I have a swich WS-C3750X-48T and i am facing the issue of high cpu utilization .


Please suggest the reason why the switch is behaving like this and what is the solution of that.



please find the log....


UG-GW-CORE#sh proc cpu | e 0.00


CPU utilization for five seconds: 34%/1%; one minute: 36%; five minutes: 36%


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


  10      833688   1686490        494  0.31%  0.71%  0.63%   0 ARP Input


  69      144766     30391       4763  0.15%  0.13%  0.11%   0 Compute load avg


  74     4470389    735065       6081  2.86%  2.75%  2.77%   0 RedEarth Tx Mana


  80     1068811     60462      17677  0.79%  0.70%  0.65%   0 Adjust Regions


116     2567337    295705       8682  1.58%  1.55%  1.56%   0 hpm counter proc


156    24497604   2908539       8422 15.57% 14.80% 14.65%   0 Hulc LED Process


167      546741     30415      17976  0.31%  0.31%  0.31%   0 HQM Stack Proces


198      604538   1052522        574  0.31%  0.58%  0.55%   0 IP Input


217     8967911   1674951       5354  6.04%  5.16%  5.23%   0 Spanning Tree


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glen.grant Mon, 01/27/2014 - 06:16
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  • Purple, 4500 points or more

  That's not exceptionally high ,  typically thw hulc led process tends to be a code issue so you might want to look at a different version or use the bug tool to see if your version has that issue.

Madhuraj singh ... Mon, 01/27/2014 - 22:44
User Badges:

Thanks for the reply ...


Actually I replace the old switch with this one .

The olod switch was having only 20 % of cpu utilization .


but from when I replaced the old switch with the same model 3750 the cpu utilization become 45% with the same configuration of network.



some other logs is ...



UG-GW-CORE#sh ip route summary

IP routing table name is Default-IP-Routing-Table(0)

IP routing table maximum-paths is 32

Route Source    Networks    Subnets     Overhead    Memory (bytes)

connected       0           25          1600        3800

static          7           33          2560        6080

eigrp 111       2           70          9216        10944

internal        6                                   7032

Total           15          128         13376       27856




UG-GW-CORE#sh ip traffic

IP statistics:

  Rcvd:  1278413 total, 1231221 local destination

         0 format errors, 0 checksum errors, 37722 bad hop count

         0 unknown protocol, 6495 not a gateway

         0 security failures, 0 bad options, 271 with options

  Opts:  0 end, 0 nop, 0 basic security, 0 loose source route

         0 timestamp, 0 extended security, 0 record route

         0 stream ID, 0 strict source route, 271 alert, 0 cipso, 0 ump

         0 other

  Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble

         0 fragmented, 0 couldn't fragment

  Bcast: 517037 received, 3132 sent

  Mcast: 70972 received, 875079 sent

  Sent:  1617393 generated, 504595072 forwarded

  Drop:  861551 encapsulation failed, 0 unresolved, 0 no adjacency

         4 no route, 0 unicast RPF, 0 forced drop

         0 options denied, 0 source IP address zero



ICMP statistics:

  Rcvd: 0 format errors, 0 checksum errors, 0 redirects, 18 unreachable

        164547 echo, 45 echo reply, 0 mask requests, 0 mask replies, 0 quench

        0 parameter, 0 timestamp, 0 info request, 0 other

        0 irdp solicitations, 0 irdp advertisements

  Sent: 0 redirects, 1026 unreachable, 50 echo, 164547 echo reply

        0 mask requests, 0 mask replies, 0 quench, 0 timestamp

        0 info reply, 6 time exceeded, 0 parameter problem

        0 irdp solicitations, 0 irdp advertisements



TCP statistics:

  Rcvd: 425143 total, 0 checksum errors, 1 no port

  Sent: 517028 total



EIGRP-IPv4 statistics:

  Rcvd: 71055 total

  Sent: 0 total



PIMv2 statistics: Sent/Received

  Total: 0/0, 0 checksum errors, 0 format errors

  Registers: 0/0 (0 non-rp, 0 non-sm-group), Register Stops: 0/0,  Hellos: 0/0

  Join/Prunes: 0/0, Asserts: 0/0, grafts: 0/0

  Bootstraps: 0/0, Candidate_RP_Advertisements: 0/0

  State-Refresh: 0/0



IGMP statistics: Sent/Received

  Total: 0/0, Format errors: 0/0, Checksum errors: 0/0

  Host Queries: 0/0, Host Reports: 0/0, Host Leaves: 0/0

  DVMRP: 0/0, PIM: 0/0



UDP statistics:

  Rcvd: 570437 total, 0 checksum errors, 52919 no port

  Sent: 59593 total, 1565718 forwarded broadcasts



OSPF statistics:

  Rcvd: 0 total, 0 checksum errors

        0 hello, 0 database desc, 0 link state req

        0 link state updates, 0 link state acks



  Sent: 0 total

        0 hello, 0 database desc, 0 link state req

        0 link state updates, 0 link state acks



ARP statistics:

  Rcvd: 2056109 requests, 29511 replies, 245 reverse, 0 other

  Sent: 404933 requests, 726725 replies (35087 proxy), 0 reverse

  Drop due to input queue full: 0





CAM Utilization for ASIC# 0                      Max            Used

                                             Masks/Values    Masks/values



Unicast mac addresses:                       6364/6364        815/815

IPv4 IGMP groups + multicast routes:         1120/1120          1/1

IPv4 unicast directly-connected routes:      6144/6144        742/742

IPv4 unicast indirectly-connected routes:    2048/2048        253/253

IPv4 policy based routing aces:               442/442          12/12

IPv4 qos aces:                                512/512          21/21

IPv4 security aces:                           954/954          35/35



Note: Allocation of TCAM entries per feature uses

a complex algorithm. The above information is meant

to provide an abstract view of the current TCAM utilization







UG-GW-CORE#sh controllers cpu-interface

ASIC    Rxbiterr   Rxunder    Fwdctfix   Txbuflos   Rxbufloc   Rxbufdrain

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

ASIC0     0          0          0          0          0          0

ASIC1     0          0          0          0          0          0

ASIC2     0          0          0          0          0          0



HOL Fix Counts

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

No Fixes:          0 Added:          0 In Use:          0 Both:          0



CPU Heartbeat Statistics



Tx Success Tx Fail    1st Thr    2nd Thr    Unthr      RetryCtMax

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

   3209252          0          0          0          0          1



Rx Delay

         0          1          2          3          4

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

   3209252          0          0          0          0



AddlDelay AdvanceCnt

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

         0          0



Rx Retries by RetryCount

         0          1          2          3          4          5          6

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

   3209252          0          0          0          0          0          0



         7          8          9

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

         0          0          0



AddlRetry

----------

         0





cpu-queue-frames  retrieved  dropped    invalid    hol-block  stray

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

rpc               3382904    0          0          0          0

stp               2330649    0          0          0          0

ipc               189710     0          0          0          0

routing protocol  5229189    0          0          0          0

L2 protocol       387206     0          0          0          0

remote console    0          0          0          0          0

sw forwarding     423435     0          0          0          0

host              1080957    0          0          0          0

broadcast         1384772    0          0          0          0

cbt-to-spt        0          0          0          0          0

igmp snooping     669364     0          0          0          0

icmp              6          0          0          0          0

logging           0          0          0          0          0

rpf-fail          0          0          0          0          0

dstats            0          0          0          0          0

cpu heartbeat     3209323    0          0          0          0



cpu-queue         static inuse static added

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

rpc               0            0

stp               0            0

ipc               0            0

routing protocol  0            0

L2 protocol       0            0

remote console    0            0

sw forwarding     0            0

host              0            0

broadcast         0            0

cbt-to-spt        0            0

igmp snooping     0            0

icmp              0            0

logging           0            0

rpf-fail          0            0

dstats            0            0

cpu heartbeat     0            0



Supervisor ASIC receive-queue parameters

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

queue 0 maxrecevsize 7E0 pakhead 4CD732C paktail 4D22518

queue 1 maxrecevsize 7E0 pakhead 47A0E2C paktail 47C5A80

queue 2 maxrecevsize 7E0 pakhead 4DCC0E0 paktail 4DCB9A8

queue 3 maxrecevsize 7E0 pakhead 5416754 paktail 54129F8

queue 4 maxrecevsize 7E0 pakhead 4F0EB60 paktail 4F0E428

queue 5 maxrecevsize 7E0 pakhead 53C08DC paktail 53CEC40

queue 6 maxrecevsize 7E0 pakhead 53E39F4 paktail 53E3658

queue 7 maxrecevsize 7E0 pakhead 53183F4 paktail 5307C78

queue 8 maxrecevsize 7E0 pakhead 5331D14 paktail 53315DC

queue 9 maxrecevsize 7E0 pakhead 518450C paktail 518450C

queue A maxrecevsize 7E0 pakhead 5166EC4 paktail 516678C

queue B maxrecevsize 7E0 pakhead 541CDA8 paktail 541CA0C

queue C maxrecevsize 7E0 pakhead 5190D98 paktail 51A647C

queue D maxrecevsize 7E0 pakhead 5180A08 paktail 518402C

queue E maxrecevsize 0 pakhead 0 paktail 0

queue F maxrecevsize 7E0 pakhead 5151CEC paktail 5151950





UG-GW-CORE#sh platform tcam utilization



CAM Utilization for ASIC# 0                      Max            Used

                                             Masks/Values    Masks/values



Unicast mac addresses:                       6364/6364        815/815

IPv4 IGMP groups + multicast routes:         1120/1120          1/1

IPv4 unicast directly-connected routes:      6144/6144        742/742

IPv4 unicast indirectly-connected routes:    2048/2048        253/253

IPv4 policy based routing aces:               442/442          12/12

IPv4 qos aces:                                512/512          21/21

IPv4 security aces:                           954/954          35/35



Note: Allocation of TCAM entries per feature uses

a complex algorithm. The above information is meant

to provide an abstract view of the current TCAM utilization

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