cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1623
Views
0
Helpful
1
Replies

4500 Switch -High Utilization

sameermunj
Level 1
Level 1

Hi Experts

I am facing in between high utilization issue with cisco 4507 switch with Sup-6LE..I checked the output of show proc cpu and found that the following two processes are using most of the cpu cycles

53   183976532 813503058        226  4.55%  3.99%  4.05%   0 Cat4k Mgmt HiPri
  54  1143450460 527837261       2166 45.11% 25.33% 29.60%   0 Cat4k Mgmt LoPri

The output of show platform health suggets that following are 2 active processes..

K5L3Unicast Adj Tabl   2.00   6.77     15     11  100  500   14  13    9  7154:35
K5 L2 Hardware Addre   2.00   7.92     20     13  100  500   20  18   10  11194:05

from cisco documentation what i could understand is these 2 processes are more or less related host flaps/l2 loops...

The output of show platform cpu packet statastics is not giving me much insight on which of teh cpu queues are getting more traffic.(output mentioned below)..so i am not able to conclude exact cause for this utilization..

can anyone suggest me the cause for this uitlization with the available data..

------------------ show platform cpu packet statistics ------------------

RkiosSysPacketMan:
Packet allocation failures: 0
Packet Buffer(Software Common) allocation failures: 0
Packet Buffer(Software ESMP) allocation failures: 0
Packet Buffer(Software EOBC) allocation failures: 0
Packet Buffer(Software SupToSup) allocation failures: 0
IOS Packet Buffer Wrapper allocation failures: 0

Packets Dropped In Processing Overall

Total                5 sec avg 1 min avg 5 min avg 1 hour avg
-------------------- --------- --------- --------- ----------
            57466647         6         1         3          1

Packets Dropped In Processing by CPU event

Event             Total                5 sec avg 1 min avg 5 min avg 1 hour avg
----------------- -------------------- --------- --------- --------- ----------
Sa Miss                       57175936         6         1         3          1
Input Acl Fwd                       11         0         0         0          0
Input ACl Copy                  290016         0         0         0          0
Output Acl Copy                    678         0         0         0          0
Sw Packet for Bridge                    6         0         0         0          0

Packets Dropped In Processing by Priority

Priority          Total                5 sec avg 1 min avg 5 min avg 1 hour avg
----------------- -------------------- --------- --------- --------- ----------
Normal                          290705         0         0         0          0
Medium                        57175942         6         1         3          1

Packets Dropped In Processing by Reason

Reason             Total                5 sec avg 1 min avg 5 min avg 1 hour avg
------------------ -------------------- --------- --------- --------- ----------
SrcAddrTableFilt                     14         0         0         0          0
STPDrop                             179         0         0         0          0
L2DstDrop                             6         0         0         0          0
AclActionDrop                       230         0         0         0          0
NoDstPorts                          448         0         0         0          0
Tx Mode Drop                   57465770         6         1         3          1

Total packet queues 64

------------------ show platform cpu packet driver ------------------


Forerunner Packet Engine 1.21

Receive Queues: received packets summary
Qu  Capac  Guara  CurPo  Unpro  Accum   Kept  BperP           Packets
2   2512    112   1914      0      2      2    514             89847
3    208     32    203      0      3      3     92          61739684
8    512    512    384      0      0      0    794          57147365
9   2512    304   1081      0      1      1    135          13792032
10    112     16     48      0      0      0     68            290016
25    112     32     75      0      3      3     68            269417
42    112     16      6      0      6      6     81               678
57     64     16     39      0      7      7    481         136869888
60    512    112    162      0      2      2     64           1105057
61    208     64     68      0      4      4    113           5526525
62   1504     64     45      0      5      5    227                45
63   1504     64   1303      0      7      7     88         286228968

Receive Queues: dropped packets summary
Qu     Total Packets      Drop No Cell      Drop Overrun     Drop Underrun
3          61739684               307                 0                 0
8          57147365           1062608                 0                 0
57         136869888             63444                 0                 0
61           5526525             27454                 0                 0

Transmit Queues
Qu  PosAdd  Pendng           Packets               Bytes
0     223       1         561612679        100034356452
1    1321       0        1679799597        108824730606

Transmitted via RxProc: 137395430

Link Stats
Rx Ucast 487581479, Mcast 13967935, Bcast 63456173
Tx Ucast 434391161, Mcast 1681999840, Bcast 125021337
Rx Jumbo Packets 0, No Jumbo Buffer 0
Interrupt 885857587, Rx review 471202073, Driver review 414708495
Rx Buffers taken 563850560, returned 563850560
Run Mode 4, reset count 0, lost Tx packets 0
Free count 11808, guaranteed 3912, ptr 0E14C800, base 0E14A500
Rx overruns 0, Rx underruns 0 Freelist errors 0

1 Reply 1

jacyu2
Cisco Employee
Cisco Employee

Hi,

from the symtom, it is traffic. you could sniffer for about 2-3 min and analysis what traffic puncted to CPU.

http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00804cef15.shtml#tool1

Regards,

Jack

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: