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871 high CPU utilization

Hi,

I have a 871 and when I'm downloading a bigger file (over 100 MB) or uploading via FTP the CPU goes to 99%.

I have tested this with basic configuration (only nat and dhcp service configured). I have install the latest IOS version that is supported on the router (c870-advipservicesk9-mz.124-24.T8.bin) but I still have the same problem.

Can someone please let me know if this is a normal behavior for 871. Will a flash/RAM upgrade will help?

Thank you

35 REPLIES

871 high CPU utilization

Hi Catalin,

During one of these high CPU states, what is the output of:

show proc cpu sorted

show proc cpu sorted 1min

cheers,

Seb.

New Member

871 high CPU utilization

Hi Seb,

Thank you for your reply.

Here is the output:

Router#sh proc cpu sorted

CPU utilization for five seconds: 89%/87%; one minute: 71%; five minutes: 25%

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

  49       48046      377383        127  0.63%  0.87%  0.35%   0 COLLECT STAT COU

120        1144     2680526          0  0.07%  0.03%  0.01%   0 HQF Shaper Backg

  77       18078       55311        326  0.07%  0.11%  0.10%   0 IP Input

121         464      751995          0  0.07%  0.01%  0.00%   0 RBSCP Background

  85        7452       38960        191  0.07%  0.01%  0.00%   0 Spanning Tree

111        1272      116689         10  0.07%  0.00%  0.00%   0 CEF: IPv4 proces

   6           0           2          0  0.00%  0.00%  0.00%   0 Timers

   5           4           5        800  0.00%  0.00%  0.00%   0 Pool Manager

   7           0           1          0  0.00%  0.00%  0.00%   0 Crash writer

   8       13229       41788        316  0.00%  0.04%  0.06%   0 ARP Input

  11           0           2          0  0.00%  0.00%  0.00%   0 AAA high-capacit

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

   9          76       78717          0  0.00%  0.00%  0.00%   0 ARP Background

   2        1420       15058         94  0.00%  0.00%  0.00%   0 Load Meter

  10           0           2          0  0.00%  0.00%  0.00%   0 ATM Idle Timer

   4      748895       42062      17804  0.00%  0.79%  0.94%   0 Check heaps

  16          16          70        228  0.00%  0.00%  0.00%   0 EEM ED Syslog

  17           0           2          0  0.00%  0.00%  0.00%   0 Serial Backgroun

  18           0           1          0  0.00%  0.00%  0.00%   0 RO Notify Timers

  19           0           1          0  0.00%  0.00%  0.00%   0 RMI RM Notify Wa

  12           0           1          0  0.00%  0.00%  0.00%   0 AAA_SERVER_DEADT

   3        4457         412      10817  0.00%  0.03%  0.02%   0 Exec

  22           0           2          0  0.00%  0.00%  0.00%   0 Dialer event

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

  23           0           1          0  0.00%  0.00%  0.00%   0 SERIAL A'detect

  24           0           2          0  0.00%  0.00%  0.00%   0 XML Proxy Client

  13           0           1          0  0.00%  0.00%  0.00%   0 Policy Manager

  14           0           2          0  0.00%  0.00%  0.00%   0 DDR Timers

  27           0           1          0  0.00%  0.00%  0.00%   0 IDB Work

  15           0           2          0  0.00%  0.00%  0.00%   0 Entity MIB API

  29          32       75243          0  0.00%  0.00%  0.00%   0 TTY Background

  20           0           2          0  0.00%  0.00%  0.00%   0 SMART

  31           0           6          0  0.00%  0.00%  0.00%   0 IF-MGR control p

  32           0          20          0  0.00%  0.00%  0.00%   0 IF-MGR event pro

  33           0           7          0  0.00%  0.00%  0.00%   0 Collection proce

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

  34           0           1          0  0.00%  0.00%  0.00%   0 Inode Table Dest

  35           0           2          0  0.00%  0.00%  0.00%   0 AggMgr Process

  36           0           1          0  0.00%  0.00%  0.00%   0 Token Daemon

  37           0           1          0  0.00%  0.00%  0.00%   0 Transport Port A

  38          28       22583          1  0.00%  0.00%  0.00%   0 HC Counter Timer

  21         200       75280          2  0.00%  0.00%  0.00%   0 GraphIt

  40         224      501887          0  0.00%  0.00%  0.00%   0 WLAN LED Timers

  41           0           2          0  0.00%  0.00%  0.00%   0 AUX

  25           0           1          0  0.00%  0.00%  0.00%   0 Critical Bkgnd

  43           0           2          0  0.00%  0.00%  0.00%   0 Eswilp Storm Con

  44          20          11       1818  0.00%  0.00%  0.00%   0 USB Startup

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

  45        5249       65464         80  0.00%  0.00%  0.00%   0 Net Input

  46          84       15063          5  0.00%  0.00%  0.00%   0 Compute load avg

  47       20197        1282      15754  0.00%  0.02%  0.00%   0 Per-minute Jobs

  48          12           6       2000  0.00%  0.00%  0.00%   0 Switch Link Moni

  26         504       51912          9  0.00%  0.00%  0.00%   0 Net Background

  50           0           1          0  0.00%  0.00%  0.00%   0 IGMP Snooping Pr

  28           0          32          0  0.00%  0.00%  0.00%   0 Logger

  52          16       75319          0  0.00%  0.00%  0.00%   0 Crypto Device Up

  53           0           1          0  0.00%  0.00%  0.00%   0 Multi-ISA Event

  54           0           1          0  0.00%  0.00%  0.00%   0 Multi-ISA Cleanu

  30         396       75329          5  0.00%  0.00%  0.00%   0 Per-Second Jobs

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

  56           0           2          0  0.00%  0.00%  0.00%   0 SEC BATCH

  57          28       75247          0  0.00%  0.00%  0.00%   0 PI MATM Aging Pr

  58           4           2       2000  0.00%  0.00%  0.00%   0 DTP Protocol

  59           4           6        666  0.00%  0.00%  0.00%   0 Dot1x Mgr Proces

  39           0           2          0  0.00%  0.00%  0.00%   0 LED Timers

  61           0           1          0  0.00%  0.00%  0.00%   0 EAP Framework

  62         116       75283          1  0.00%  0.00%  0.00%   0 linktest

  63           0           2          0  0.00%  0.00%  0.00%   0 Dot11 Mgmt & Ass

  64           0           2          0  0.00%  0.00%  0.00%   0 Dot11 aaa proces

  65           0        1256          0  0.00%  0.00%  0.00%   0 pmkid

  66           0           2          0  0.00%  0.00%  0.00%   0 Dot11 auth Dot1x

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

  67           0           1          0  0.00%  0.00%  0.00%   0 Dot11 Mac Auth

  68           0           2          0  0.00%  0.00%  0.00%   0 AAA Dictionary R

  69           0           2          0  0.00%  0.00%  0.00%   0 AAA Server

  70           0           1          0  0.00%  0.00%  0.00%   0 AAA ACCT Proc

  71           0           1          0  0.00%  0.00%  0.00%   0 ACCT Periodic Pr

  72         108        8798         12  0.00%  0.00%  0.00%   0 CDP Protocol

  73           0           2          0  0.00%  0.00%  0.00%   0 CEF switching ba

  74           0           5          0  0.00%  0.00%  0.00%   0 ADJ resolve proc

  75          12           7       1714  0.00%  0.00%  0.00%   0 IP ARP Adjacency

  76           4           1       4000  0.00%  0.00%  0.00%   0 IP ARP Retry Age

  42          72           6      12000  0.00%  0.00%  0.00%   0 ESWPPM

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

  78           0           1          0  0.00%  0.00%  0.00%   0 ICMP event handl

  79           0           1          0  0.00%  0.00%  0.00%   0 IPv6 Echo event

  80           0           3          0  0.00%  0.00%  0.00%   0 PPP Hooks

  82           0           1          0  0.00%  0.00%  0.00%   0 SSS Manager

  83           0           1          0  0.00%  0.00%  0.00%   0 SSS Feature Mana

  84           0           1          0  0.00%  0.00%  0.00%   0 SSS Feature Time

  51         204        1891        107  0.00%  0.00%  0.00%   0 IGMP Snooping Re

  86           0          24          0  0.00%  0.00%  0.00%   0 SSM connection m

  87           0           1          0  0.00%  0.00%  0.00%   0 AC Switch

  88           0         252          0  0.00%  0.00%  0.00%   0 Authentication P

  89           0           1          0  0.00%  0.00%  0.00%   0 Auth-proxy AAA B

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

  90           0           2          0  0.00%  0.00%  0.00%   0 EAPoUDP Process

  91           0           2          0  0.00%  0.00%  0.00%   0 IP Host Track Pr

  92         152        1446        105  0.00%  0.00%  0.00%   0 IP Background

  93          32        1064         30  0.00%  0.00%  0.00%   0 IP RIB Update

  94           0           1          0  0.00%  0.00%  0.00%   0 L2X Data Daemon

  95           0           2          0  0.00%  0.00%  0.00%   0 PPP IP Route

  96           0           2          0  0.00%  0.00%  0.00%   0 PPP IPCP

  97           0           2          0  0.00%  0.00%  0.00%   0 Dot1x Supplicant

  98           0           2          0  0.00%  0.00%  0.00%   0 Dot1x Supplicant

  99           0           2          0  0.00%  0.00%  0.00%   0 Dot1x Supplicant

100          56          74        756  0.00%  0.00%  0.00%   0 L2MM

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

101           0           1          0  0.00%  0.00%  0.00%   0 MRD

102         484        1952        247  0.00%  0.00%  0.00%   0 IGMPSN

  55         296          26      11384  0.00%  0.00%  0.00%   0 crypto engine pr

104           0           1          0  0.00%  0.00%  0.00%   0 TCP Protocols

105           0           1          0  0.00%  0.00%  0.00%   0 Socket Timers

106           0         252          0  0.00%  0.00%  0.00%   0 HTTP CORE

107           4        1511          2  0.00%  0.00%  0.00%   0 CEF background p

108           0           1          0  0.00%  0.00%  0.00%   0 SNMP Timers

109           0           1          0  0.00%  0.00%  0.00%   0 COPS

110           0           2          0  0.00%  0.00%  0.00%   0 Dialer Forwarder

   1          12          33        363  0.00%  0.00%  0.00%   0 Chunk Manager

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

112           0           4          0  0.00%  0.00%  0.00%   0 ADJ background

113           0           3          0  0.00%  0.00%  0.00%   0 Flow Exporter Ti

114           0           1          0  0.00%  0.00%  0.00%   0 IP Traceroute

115           8          91         87  0.00%  0.00%  0.00%   0 RARP Input

116           0           1          0  0.00%  0.00%  0.00%   0 IPv6 Inspect Tim

117           0           2          0  0.00%  0.00%  0.00%   0 PPP Bind

118           0           2          0  0.00%  0.00%  0.00%   0 PPP SSS

119           0           1          0  0.00%  0.00%  0.00%   0 MQC Flow Event B

  60           0           1          0  0.00%  0.00%  0.00%   0 MAB Framework

103           0           1          0  0.00%  0.00%  0.00%   0 TCP Timer

122           4           7        571  0.00%  0.00%  0.00%   0 SCTP Main Proces

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

123           0           1          0  0.00%  0.00%  0.00%   0 VPDN call manage

124           0           1          0  0.00%  0.00%  0.00%   0 IPS Process

125           0           2          0  0.00%  0.00%  0.00%   0 IPS Auto Update

126           0           2          0  0.00%  0.00%  0.00%   0 SDEE Management

127         196      146914          1  0.00%  0.00%  0.00%   0 Inspect process

128           0         628          0  0.00%  0.00%  0.00%   0 DHCPD Timer

129           4        6019          0  0.00%  0.00%  0.00%   0 FW DP Inspect pr

130           0           1          0  0.00%  0.00%  0.00%   0 tHUB

131          80      146914          0  0.00%  0.00%  0.00%   0 CCE DP URLF cach

132           0           2          0  0.00%  0.00%  0.00%   0 URL filter proc

133           0           1          0  0.00%  0.00%  0.00%   0 Select Timers

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

134          32           2      16000  0.00%  0.00%  0.00%   0 HTTP Process

135           0           2          0  0.00%  0.00%  0.00%   0 CIFS API Process

136           4           2       2000  0.00%  0.00%  0.00%   0 CIFS Proxy Proce

137           4           1       4000  0.00%  0.00%  0.00%   0 Crypto HW Proc

139           0           2          0  0.00%  0.00%  0.00%   0 AAA Cached Serve

140           0           2          0  0.00%  0.00%  0.00%   0 ENABLE AAA

141           0           1          0  0.00%  0.00%  0.00%   0 EM Background Pr

142           0           1          0  0.00%  0.00%  0.00%   0 Key chain liveke

143           0           2          0  0.00%  0.00%  0.00%   0 LINE AAA

144           0           2          0  0.00%  0.00%  0.00%   0 LOCAL AAA

145           0           2          0  0.00%  0.00%  0.00%   0 TPLUS

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

146           0           1          0  0.00%  0.00%  0.00%   0 FW_TEST_TRP

147           0           1          0  0.00%  0.00%  0.00%   0 EPM MAIN PROCESS

148           0           3          0  0.00%  0.00%  0.00%   0 Crypto WUI

149           0           2          0  0.00%  0.00%  0.00%   0 Crypto Support

150           0           1          0  0.00%  0.00%  0.00%   0 IPSECv6 PS Proc

151           0           4          0  0.00%  0.00%  0.00%   0 Crypto CA

152           0           1          0  0.00%  0.00%  0.00%   0 Crypto PKI-CRL

153           0           1          0  0.00%  0.00%  0.00%   0 Key Proc

154           0           1          0  0.00%  0.00%  0.00%   0 encrypt proc

155       36149        2592      13946  0.00%  0.00%  0.00%   0 crypto sw pk pro

156           0           1          0  0.00%  0.00%  0.00%   0 Crypto INT

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

157           0           3          0  0.00%  0.00%  0.00%   0 Crypto IKE Dispa

158           4           3       1333  0.00%  0.00%  0.00%   0 Crypto IKMP

159           0           1          0  0.00%  0.00%  0.00%   0 IPSEC manual key

160         148        3767         39  0.00%  0.00%  0.00%   0 IPSEC key engine

161           0           1          0  0.00%  0.00%  0.00%   0 CRYPTO QoS proce

162           4           6        666  0.00%  0.00%  0.00%   0 Crypto ACL

163           0           1          0  0.00%  0.00%  0.00%   0 Crypto PAS Proc

164           0           1          0  0.00%  0.00%  0.00%   0 GDOI GM Process

165           0           1          0  0.00%  0.00%  0.00%   0 UNICAST REKEY

166           0           1          0  0.00%  0.00%  0.00%   0 UNICAST REKEY AC

167          20       34977          0  0.00%  0.00%  0.00%   0 PM Callback

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

168           0           2          0  0.00%  0.00%  0.00%   0 Control-plane ho

169           0           2          0  0.00%  0.00%  0.00%   0 AAA SEND STOP EV

170           4           2       2000  0.00%  0.00%  0.00%   0 EEM ED Resource

171           0           2          0  0.00%  0.00%  0.00%   0 EEM ED Routing

172           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Track

173           0        7528          0  0.00%  0.00%  0.00%   0 RMON Recycle Pro

174           0           2          0  0.00%  0.00%  0.00%   0 RMON Deferred Se

175           0           1          0  0.00%  0.00%  0.00%   0 Syslog Traps

176           8        2353          3  0.00%  0.00%  0.00%   0 Crypto cTCP proc

177          28           2      14000  0.00%  0.00%  0.00%   0 VLAN Manager

178           0        1255          0  0.00%  0.00%  0.00%   0 DHCPD Database

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

179           4          52         76  0.00%  0.00%  0.00%   0 EEM Server

180           0           2          0  0.00%  0.00%  0.00%   0 EEM Policy Direc

181           0           3          0  0.00%  0.00%  0.00%   0 EEM ED CLI

182           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Counter

183           0           3          0  0.00%  0.00%  0.00%   0 EM ED GOLD

184           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Interface

185           4           3       1333  0.00%  0.00%  0.00%   0 EEM ED IOSWD

186           4           3       1333  0.00%  0.00%  0.00%   0 EEM ED Ipsla

187           0           3          0  0.00%  0.00%  0.00%   0 EEM ED None

188           0           2          0  0.00%  0.00%  0.00%   0 EEM ED Nf

189           0           3          0  0.00%  0.00%  0.00%   0 EEM ED OIR

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

190           0           1          0  0.00%  0.00%  0.00%   0 VPDN Test

191           0           3          0  0.00%  0.00%  0.00%   0 EEM ED SNMP

192           0           2          0  0.00%  0.00%  0.00%   0 EEM ED SNMP Noti

193           0        1886          0  0.00%  0.00%  0.00%   0 EEM ED Timer

194           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Test

195           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Config

196           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Env

197           0          18          0  0.00%  0.00%  0.00%   0 Syslog

198           0           3          0  0.00%  0.00%  0.00%   0 EEM ED RPC

201           8          43        186  0.00%  0.00%  0.00%   0 SSH Event handle

202         168        1039        161  0.00%  0.00%  0.00%   0 DHCPD Receive

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

203         260       75287          3  0.00%  0.00%  0.00%   0 DHCP Client

205         445      146917          3  0.00%  0.00%  0.00%   0 IP NAT Ager

206           0           1          0  0.00%  0.00%  0.00%   0 IP NAT WLAN

207           0           1          0  0.00%  0.00%  0.00%   0 IP VFR proc

Router#sh proc cpu sorted 1min

CPU utilization for five seconds: 18%/17%; one minute: 17%; five minutes: 19%

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

   4      750096       42128      17805  0.00%  1.30%  1.01%   0 Check heaps

  49       48986      377900        129  0.55%  0.29%  0.29%   0 COLLECT STAT COU

  77       18210       55706        326  0.07%  0.07%  0.09%   0 IP Input

   8       13321       42023        316  0.07%  0.05%  0.05%   0 ARP Input

   3        4541         670       6777  0.00%  0.05%  0.03%   0 Exec

  47       20229        1284      15754  0.31%  0.03%  0.00%   0 Per-minute Jobs

  45        5281       65640         80  0.00%  0.00%  0.00%   0 Net Input

  26         512       51963          9  0.07%  0.00%  0.00%   0 Net Background

120        1168     2684138          0  0.00%  0.00%  0.00%   0 HQF Shaper Backg

   9          80       78824          1  0.00%  0.00%  0.00%   0 ARP Background

  10           0           2          0  0.00%  0.00%  0.00%   0 ATM Idle Timer

Router#sh proc cpu sorted 1min

CPU utilization for five seconds: 91%/89%; one minute: 22%; five minutes: 20%

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

   4      750669       42135      17815  0.55%  1.24%  1.01%   0 Check heaps

  49       51082      377908        135  1.18%  0.37%  0.30%   0 COLLECT STAT COU

  77       18222       55709        327  0.00%  0.06%  0.08%   0 IP Input

   8       13353       42027        317  0.07%  0.05%  0.06%   0 ARP Input

   3        4793         677       7079  0.07%  0.05%  0.03%   0 Exec

  47       20229        1284      15754  0.00%  0.03%  0.00%   0 Per-minute Jobs

  45        5281       65642         80  0.00%  0.00%  0.00%   0 Net Input

   2        1480       15079         98  0.07%  0.00%  0.00%   0 Load Meter

  40         228      502581          0  0.07%  0.00%  0.00%   0 WLAN LED Timers

  30         504       75436          6  0.07%  0.00%  0.00%   0 Per-Second Jobs

  26         512       51963          9  0.00%  0.00%  0.00%   0 Net Background

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

120        1172     2684159          0  0.00%  0.00%  0.00%   0 HQF Shaper Backg

  12           0           1          0  0.00%  0.00%  0.00%   0 AAA_SERVER_DEADT

  13           0           1          0  0.00%  0.00%  0.00%   0 Policy Manager

  14           0           2          0  0.00%  0.00%  0.00%   0 DDR Timers

  15           0           2          0  0.00%  0.00%  0.00%   0 Entity MIB API

  17           0           2          0  0.00%  0.00%  0.00%   0 Serial Backgroun

  16          16          70        228  0.00%  0.00%  0.00%   0 EEM ED Syslog

  19           0           1          0  0.00%  0.00%  0.00%   0 RMI RM Notify Wa

  20           0           2          0  0.00%  0.00%  0.00%   0 SMART

  18           0           1          0  0.00%  0.00%  0.00%   0 RO Notify Timers

  22           0           2          0  0.00%  0.00%  0.00%   0 Dialer event

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

  23           0           1          0  0.00%  0.00%  0.00%   0 SERIAL A'detect

  24           0           2          0  0.00%  0.00%  0.00%   0 XML Proxy Client

  21         200       75387          2  0.00%  0.00%  0.00%   0 GraphIt

  11           0           2          0  0.00%  0.00%  0.00%   0 AAA high-capacit

  27           0           1          0  0.00%  0.00%  0.00%   0 IDB Work

  28           0          32          0  0.00%  0.00%  0.00%   0 Logger

  29          32       75349          0  0.00%  0.00%  0.00%   0 TTY Background

  10           0           2          0  0.00%  0.00%  0.00%   0 ATM Idle Timer

  25           0           1          0  0.00%  0.00%  0.00%   0 Critical Bkgnd

  32           0          20          0  0.00%  0.00%  0.00%   0 IF-MGR event pro

  33           0           7          0  0.00%  0.00%  0.00%   0 Collection proce

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

  34           0           1          0  0.00%  0.00%  0.00%   0 Inode Table Dest

  35           0           2          0  0.00%  0.00%  0.00%   0 AggMgr Process

  36           0           1          0  0.00%  0.00%  0.00%   0 Token Daemon

  37           0           1          0  0.00%  0.00%  0.00%   0 Transport Port A

  38          28       22615          1  0.00%  0.00%  0.00%   0 HC Counter Timer

  31           0           6          0  0.00%  0.00%  0.00%   0 IF-MGR control p

   9          80       78828          1  0.00%  0.00%  0.00%   0 ARP Background

  41           0           2          0  0.00%  0.00%  0.00%   0 AUX

  42          72           6      12000  0.00%  0.00%  0.00%   0 ESWPPM

  43           0           2          0  0.00%  0.00%  0.00%   0 Eswilp Storm Con

  44          20          11       1818  0.00%  0.00%  0.00%   0 USB Startup

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

   7           0           1          0  0.00%  0.00%  0.00%   0 Crash writer

  46          84       15084          5  0.00%  0.00%  0.00%   0 Compute load avg

   6           0           2          0  0.00%  0.00%  0.00%   0 Timers

  48          12           6       2000  0.00%  0.00%  0.00%   0 Switch Link Moni

   5           4           5        800  0.00%  0.00%  0.00%   0 Pool Manager

  50           0           1          0  0.00%  0.00%  0.00%   0 IGMP Snooping Pr

   1          12          33        363  0.00%  0.00%  0.00%   0 Chunk Manager

  52          16       75426          0  0.00%  0.00%  0.00%   0 Crypto Device Up

  53           0           1          0  0.00%  0.00%  0.00%   0 Multi-ISA Event

  54           0           1          0  0.00%  0.00%  0.00%   0 Multi-ISA Cleanu

  55         296          26      11384  0.00%  0.00%  0.00%   0 crypto engine pr

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

  56           0           2          0  0.00%  0.00%  0.00%   0 SEC BATCH

  57          28       75353          0  0.00%  0.00%  0.00%   0 PI MATM Aging Pr

  58           4           2       2000  0.00%  0.00%  0.00%   0 DTP Protocol

  59           4           6        666  0.00%  0.00%  0.00%   0 Dot1x Mgr Proces

  39           0           2          0  0.00%  0.00%  0.00%   0 LED Timers

  61           0           1          0  0.00%  0.00%  0.00%   0 EAP Framework

  62         116       75389          1  0.00%  0.00%  0.00%   0 linktest

  63           0           2          0  0.00%  0.00%  0.00%   0 Dot11 Mgmt & Ass

  64           0           2          0  0.00%  0.00%  0.00%   0 Dot11 aaa proces

  65           0        1258          0  0.00%  0.00%  0.00%   0 pmkid

  66           0           2          0  0.00%  0.00%  0.00%   0 Dot11 auth Dot1x

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

  67           0           1          0  0.00%  0.00%  0.00%   0 Dot11 Mac Auth

  68           0           2          0  0.00%  0.00%  0.00%   0 AAA Dictionary R

  69           0           2          0  0.00%  0.00%  0.00%   0 AAA Server

  70           0           1          0  0.00%  0.00%  0.00%   0 AAA ACCT Proc

  71           0           1          0  0.00%  0.00%  0.00%   0 ACCT Periodic Pr

  72         108        8813         12  0.00%  0.00%  0.00%   0 CDP Protocol

  73           0           2          0  0.00%  0.00%  0.00%   0 CEF switching ba

  74           0           5          0  0.00%  0.00%  0.00%   0 ADJ resolve proc

  75          12           7       1714  0.00%  0.00%  0.00%   0 IP ARP Adjacency

  76           4           1       4000  0.00%  0.00%  0.00%   0 IP ARP Retry Age

  51         204        1895        107  0.00%  0.00%  0.00%   0 IGMP Snooping Re

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

  78           0           1          0  0.00%  0.00%  0.00%   0 ICMP event handl

  79           0           1          0  0.00%  0.00%  0.00%   0 IPv6 Echo event

  80           0           3          0  0.00%  0.00%  0.00%   0 PPP Hooks

  82           0           1          0  0.00%  0.00%  0.00%   0 SSS Manager

  83           0           1          0  0.00%  0.00%  0.00%   0 SSS Feature Mana

  84           0           1          0  0.00%  0.00%  0.00%   0 SSS Feature Time

  85        7460       39118        190  0.00%  0.00%  0.00%   0 Spanning Tree

  86           0          24          0  0.00%  0.00%  0.00%   0 SSM connection m

  87           0           1          0  0.00%  0.00%  0.00%   0 AC Switch

  88           0         252          0  0.00%  0.00%  0.00%   0 Authentication P

  89           0           1          0  0.00%  0.00%  0.00%   0 Auth-proxy AAA B

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

  90           0           2          0  0.00%  0.00%  0.00%   0 EAPoUDP Process

  91           0           2          0  0.00%  0.00%  0.00%   0 IP Host Track Pr

  92         252        1448        174  0.00%  0.00%  0.00%   0 IP Background

  93          32        1066         30  0.00%  0.00%  0.00%   0 IP RIB Update

  94           0           1          0  0.00%  0.00%  0.00%   0 L2X Data Daemon

  95           0           2          0  0.00%  0.00%  0.00%   0 PPP IP Route

  96           0           2          0  0.00%  0.00%  0.00%   0 PPP IPCP

  97           0           2          0  0.00%  0.00%  0.00%   0 Dot1x Supplicant

  98           0           2          0  0.00%  0.00%  0.00%   0 Dot1x Supplicant

  99           0           2          0  0.00%  0.00%  0.00%   0 Dot1x Supplicant

100          56          74        756  0.00%  0.00%  0.00%   0 L2MM

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

101           0           1          0  0.00%  0.00%  0.00%   0 MRD

102         484        1956        247  0.00%  0.00%  0.00%   0 IGMPSN

  60           0           1          0  0.00%  0.00%  0.00%   0 MAB Framework

104           0           1          0  0.00%  0.00%  0.00%   0 TCP Protocols

105           0           1          0  0.00%  0.00%  0.00%   0 Socket Timers

106           0         252          0  0.00%  0.00%  0.00%   0 HTTP CORE

107           4        1512          2  0.00%  0.00%  0.00%   0 CEF background p

108           0           1          0  0.00%  0.00%  0.00%   0 SNMP Timers

109           0           1          0  0.00%  0.00%  0.00%   0 COPS

110           0           2          0  0.00%  0.00%  0.00%   0 Dialer Forwarder

111        1500      116852         12  0.00%  0.00%  0.00%   0 CEF: IPv4 proces

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

112           0           4          0  0.00%  0.00%  0.00%   0 ADJ background

113           0           3          0  0.00%  0.00%  0.00%   0 Flow Exporter Ti

114           0           1          0  0.00%  0.00%  0.00%   0 IP Traceroute

115           8          91         87  0.00%  0.00%  0.00%   0 RARP Input

116           0           1          0  0.00%  0.00%  0.00%   0 IPv6 Inspect Tim

117           0           2          0  0.00%  0.00%  0.00%   0 PPP Bind

118           0           2          0  0.00%  0.00%  0.00%   0 PPP SSS

119           0           1          0  0.00%  0.00%  0.00%   0 MQC Flow Event B

103           0           1          0  0.00%  0.00%  0.00%   0 TCP Timer

121         476      753027          0  0.00%  0.00%  0.00%   0 RBSCP Background

122           4           7        571  0.00%  0.00%  0.00%   0 SCTP Main Proces

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

123           0           1          0  0.00%  0.00%  0.00%   0 VPDN call manage

124           0           1          0  0.00%  0.00%  0.00%   0 IPS Process

125           0           2          0  0.00%  0.00%  0.00%   0 IPS Auto Update

126           0           2          0  0.00%  0.00%  0.00%   0 SDEE Management

127         296      147119          2  0.00%  0.00%  0.00%   0 Inspect process

128           0         629          0  0.00%  0.00%  0.00%   0 DHCPD Timer

129           4        6027          0  0.00%  0.00%  0.00%   0 FW DP Inspect pr

130           0           1          0  0.00%  0.00%  0.00%   0 tHUB

131          84      147119          0  0.00%  0.00%  0.00%   0 CCE DP URLF cach

132           0           2          0  0.00%  0.00%  0.00%   0 URL filter proc

133           0           1          0  0.00%  0.00%  0.00%   0 Select Timers

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

134          32           2      16000  0.00%  0.00%  0.00%   0 HTTP Process

135           0           2          0  0.00%  0.00%  0.00%   0 CIFS API Process

136           4           2       2000  0.00%  0.00%  0.00%   0 CIFS Proxy Proce

137           4           1       4000  0.00%  0.00%  0.00%   0 Crypto HW Proc

139           0           2          0  0.00%  0.00%  0.00%   0 AAA Cached Serve

140           0           2          0  0.00%  0.00%  0.00%   0 ENABLE AAA

141           0           1          0  0.00%  0.00%  0.00%   0 EM Background Pr

142           0           1          0  0.00%  0.00%  0.00%   0 Key chain liveke

143           0           2          0  0.00%  0.00%  0.00%   0 LINE AAA

144           0           2          0  0.00%  0.00%  0.00%   0 LOCAL AAA

145           0           2          0  0.00%  0.00%  0.00%   0 TPLUS

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

146           0           1          0  0.00%  0.00%  0.00%   0 FW_TEST_TRP

147           0           1          0  0.00%  0.00%  0.00%   0 EPM MAIN PROCESS

148           0           3          0  0.00%  0.00%  0.00%   0 Crypto WUI

149           0           2          0  0.00%  0.00%  0.00%   0 Crypto Support

150           0           1          0  0.00%  0.00%  0.00%   0 IPSECv6 PS Proc

151           0           4          0  0.00%  0.00%  0.00%   0 Crypto CA

152           0           1          0  0.00%  0.00%  0.00%   0 Crypto PKI-CRL

153           0           1          0  0.00%  0.00%  0.00%   0 Key Proc

154           0           1          0  0.00%  0.00%  0.00%   0 encrypt proc

155       36149        2592      13946  0.00%  0.00%  0.00%   0 crypto sw pk pro

156           0           1          0  0.00%  0.00%  0.00%   0 Crypto INT

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

157           0           3          0  0.00%  0.00%  0.00%   0 Crypto IKE Dispa

158           4           3       1333  0.00%  0.00%  0.00%   0 Crypto IKMP

159           0           1          0  0.00%  0.00%  0.00%   0 IPSEC manual key

160         148        3772         39  0.00%  0.00%  0.00%   0 IPSEC key engine

161           0           1          0  0.00%  0.00%  0.00%   0 CRYPTO QoS proce

162           4           6        666  0.00%  0.00%  0.00%   0 Crypto ACL

163           0           1          0  0.00%  0.00%  0.00%   0 Crypto PAS Proc

164           0           1          0  0.00%  0.00%  0.00%   0 GDOI GM Process

165           0           1          0  0.00%  0.00%  0.00%   0 UNICAST REKEY

166           0           1          0  0.00%  0.00%  0.00%   0 UNICAST REKEY AC

167          32       35030          0  0.00%  0.00%  0.00%   0 PM Callback

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

168           0           2          0  0.00%  0.00%  0.00%   0 Control-plane ho

169           0           2          0  0.00%  0.00%  0.00%   0 AAA SEND STOP EV

170           4           2       2000  0.00%  0.00%  0.00%   0 EEM ED Resource

171           0           2          0  0.00%  0.00%  0.00%   0 EEM ED Routing

172           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Track

173           0        7538          0  0.00%  0.00%  0.00%   0 RMON Recycle Pro

174           0           2          0  0.00%  0.00%  0.00%   0 RMON Deferred Se

175           0           1          0  0.00%  0.00%  0.00%   0 Syslog Traps

176           8        2356          3  0.00%  0.00%  0.00%   0 Crypto cTCP proc

177          28           2      14000  0.00%  0.00%  0.00%   0 VLAN Manager

178           0        1257          0  0.00%  0.00%  0.00%   0 DHCPD Database

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

179           4          52         76  0.00%  0.00%  0.00%   0 EEM Server

180           0           2          0  0.00%  0.00%  0.00%   0 EEM Policy Direc

181           0           3          0  0.00%  0.00%  0.00%   0 EEM ED CLI

182           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Counter

183           0           3          0  0.00%  0.00%  0.00%   0 EM ED GOLD

184           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Interface

185           4           3       1333  0.00%  0.00%  0.00%   0 EEM ED IOSWD

186           4           3       1333  0.00%  0.00%  0.00%   0 EEM ED Ipsla

187           0           3          0  0.00%  0.00%  0.00%   0 EEM ED None

188           0           2          0  0.00%  0.00%  0.00%   0 EEM ED Nf

189           0           3          0  0.00%  0.00%  0.00%   0 EEM ED OIR

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

190           0           1          0  0.00%  0.00%  0.00%   0 VPDN Test

191           0           3          0  0.00%  0.00%  0.00%   0 EEM ED SNMP

192           0           2          0  0.00%  0.00%  0.00%   0 EEM ED SNMP Noti

193           0        1889          0  0.00%  0.00%  0.00%   0 EEM ED Timer

194           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Test

195           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Config

196           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Env

197           0          18          0  0.00%  0.00%  0.00%   0 Syslog

198           0           3          0  0.00%  0.00%  0.00%   0 EEM ED RPC

201           8          43        186  0.00%  0.00%  0.00%   0 SSH Event handle

202         168        1039        161  0.00%  0.00%  0.00%   0 DHCPD Receive

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

203         260       75393          3  0.00%  0.00%  0.00%   0 DHCP Client

205         449      147122          3  0.00%  0.00%  0.00%   0 IP NAT Ager

206           0           1          0  0.00%  0.00%  0.00%   0 IP NAT WLAN

207           0           1          0  0.00%  0.00%  0.00%   0 IP VFR proc

871 high CPU utilization

Hi Catalin,

The line:

CPU utilization for five seconds: 91%/89%; one minute: 22%; five minutes: 20%

...indicates 89% of CPU usage is down to intterupts where the packets are being process switched as opposed to processing by CEF. The other 2% being made of running processes.

What is the output from:

show ip cef switching statistics

Also take a look at this document which will run you through some tests you can carry out:

http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af0.shtml

cheers,

Seb.

New Member

Re: 871 high CPU utilization

Hi Seb,

here is the output:

Router#sh ip cef switching statistics

       Reason                                Drop       Punt  Punt2Host

RP LES No route                        2226              0          1

RP LES Packet destined for us        0        38152          0

RP LES TTL expired                        0            0      26128

RP LES Features                           0               0        924

RP LES Unclassified reason        22334           0          0

RP LES Total                             24560      38152      27053

All    Total                                 24560      38152      27053

Super Bronze

Re: 871 high CPU utilization

Disclaimer

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Posting

Your CPU stats indicate most of your CPU is "interrupt" CPU, i.e. normal packet forwarding.

An 871 had only a 25 Kpps rate "engine".  Cisco recommends the 25 Kbps 860 series for only 4 Mbps of WAN bandwidth.

What's your aggregate bandwidth utilization when CPU tops out?

New Member

Re: 871 high CPU utilization

Hi Joseph,

Can you please tell me how do I check that ?

871 high CPU utilization

Try this command to show you the per interface pps on the router:

sh int summary

New Member

Re: 871 high CPU utilization

Router#sh inter summary

*: interface is up

IHQ: pkts in input hold queue     IQD: pkts dropped from input queue

OHQ: pkts in output hold queue    OQD: pkts dropped from output queue

RXBS: rx rate (bits/sec)          RXPS: rx rate (pkts/sec)

TXBS: tx rate (bits/sec)          TXPS: tx rate (pkts/sec)

TRTL: throttle count

  Interface              IHQ   IQD  OHQ   OQD  RXBS RXPS  TXBS TXPS TRTL

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

* FastEthernet0            0     0    0     0 2582000  274 60000  107    0

* FastEthernet1            0     0    0     0 61000  107 2594000  270    0

  FastEthernet2            0     0    0     0     0    0     0    0    0

  FastEthernet3            0     0    0     0     0    0     0    0    0

  FastEthernet4            0     0    0     0     0    0     0    0    0

  NVI0                     0     0    0     0     0    0     0    0    0

* Vlan1                    0     0    0     0 2873000  306 56000  118    0

* Vlan192                  0     0    0     0 61000  118 2862000  299    0

871 high CPU utilization

Was that during a download and high CPU usage?

New Member

Re: 871 high CPU utilization

Yes

871 high CPU utilization

OK, what's the output from: sh int stats

...compare the ratio between 'Processor' and 'Total', to see what percentage of packets processed by the CPU.

Also the output from:

sh int fa0

sh int fa1

...look at the 'overrun' counter. A high number here would indicate an inerface that is stuggling to process the number of packets being processed.

If any of the above numbers are high, then this is highlighting a hardware limitation. So long as there aren't many packet drops, then this limitation will only manifest itself with increased latency.

New Member

Re: 871 high CPU utilization

Router#sh interfaces stats
FastEthernet0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor      57707   69990129      21779    1412159
             Route cache          0          0          0          0
                   Total      57707   69990129      21779    1412159
FastEthernet1
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor      20422    1341906      53711   65306522
             Route cache          0          0          0          0
                   Total      20422    1341906      53711   65306522
FastEthernet2
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0          0          0
             Route cache          0          0          0          0
                   Total          0          0          0          0
FastEthernet3
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0          0          0
             Route cache          0          0          0          0
                   Total          0          0          0          0
Interface FastEthernet4 is disabled

Interface NVI0 is disabled

Vlan1
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor        222      63489         18       1629
             Route cache      73197   88759272      27702    1519940
                   Total      73419   88822761      27720    1521569
Vlan192
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor         94      17399         19       2646
             Route cache      27888    1692644      73693   89384507
                   Total      27982    1710043      73712   89387153
Router#sh int fa 0
FastEthernet0 is up, line protocol is up
  Hardware is Fast Ethernet, address is 0019.e75b.1455 (bia 0019.e75b.1455)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 8/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:01, output never, output hang never
  Last clearing of "show interface" counters 00:00:40
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 3354000 bits/sec, 353 packets/sec
  5 minute output rate 73000 bits/sec, 135 packets/sec
     121840 packets input, 148008746 bytes, 0 no buffer
     Received 124 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     46314 packets output, 2992014 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     2 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
Router#sh int fa 1
FastEthernet1 is up, line protocol is up
  Hardware is Fast Ethernet, address is 0019.e75b.1456 (bia 0019.e75b.1456)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 11/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 00:00:49
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 103000 bits/sec, 190 packets/sec
  5 minute output rate 4675000 bits/sec, 485 packets/sec
     58198 packets input, 3774735 bytes, 0 no buffer
     Received 98 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     152620 packets output, 185746450 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

Re: 871 high CPU utilization

Looks like every packet is handled by the processor:

Router#sh interfaces stats

FastEthernet0

          Switching path    Pkts In   Chars In   Pkts Out  Chars Out

               Processor      57707   69990129      21779    1412159

             Route cache          0          0          0          0

                   Total      57707   69990129      21779    1412159

FastEthernet1

          Switching path    Pkts In   Chars In   Pkts Out  Chars Out

               Processor      20422    1341906      53711   65306522

             Route cache          0          0          0          0

                   Total      20422    1341906      53711   65306522

...so to answer your original question, this appears to be normal behaviour!

New Member

Re: 871 high CPU utilization

OK. Thank you!

I see that the route cache for the interfaces vlan1 and vlan192 is very high. Is this the normal behavior ?

It's very strange that I can't download large files from ftp with this model.

Will an upgrade of RAM help ?

871 high CPU utilization

I believe that is because all L3 interfaces (your SVIs 1 & 192) are all typically handled that way. Any packets on an SVI showing under 'Processor' will be related to packets shown under 'sh ip cef switching stats' .

I can't explain the issue with FTP. Does transfer initiate or timeout?

New Member

Re: 871 high CPU utilization

The FTP transfer is succesfull but in this time nothing else works. This also happens when I try to download a large file via http.

For example if I download 1 GB file, nobody else can use the network.

871 high CPU utilization

That sounds like a problem potentially caused by NAT. Perhaps NAT'ing to a pool with a single 'outside' address instead of using PAT and sharing that 'outside' address amoungst all the internal users.

Any chance you can post your router config?

New Member

871 high CPU utilization

Router#sh run

Building configuration...

Current configuration : 1434 bytes

!

version 12.4

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname Router

!

boot-start-marker

boot system flash:c870-advsecurityk9-mz.124-24.T8.bin

boot system flash:c870-advipservicesk9-mz.124-24.T8.bin

boot-end-marker

!

logging message-counter syslog

!

no aaa new-model

!

!

dot11 syslog

ip source-route

!

!

no ip dhcp use vrf connected

!

ip dhcp pool LAN192

   network 192.168.12.0 255.255.255.0

   default-router 192.168.12.1

   dns-server 8.8.8.8

!

!

ip cef

no ipv6 cef

!

multilink bundle-name authenticated

!

!

!

!

!

!

archive

log config

  hidekeys

!

!

ip ssh version 1

!

!

!

interface FastEthernet0

!

interface FastEthernet1

switchport access vlan 192

!

interface FastEthernet2

!

interface FastEthernet3

!

interface FastEthernet4

no ip address

shutdown

duplex auto

speed auto

!

interface Vlan1

ip address dhcp

ip nat outside

ip virtual-reassembly

ip tcp adjust-mss 1360

!

interface Vlan192

ip address 192.168.12.1 255.255.255.0

ip nat inside

ip virtual-reassembly

!

ip forward-protocol nd

ip route 0.0.0.0 0.0.0.0 FastEthernet0

no ip http server

no ip http secure-server

!

!

ip nat inside source list NAT_ACL interface Vlan1 overload

!

ip access-list extended NAT_ACL

permit ip 192.168.12.0 0.0.0.255 any

!

!

!

!

!

!

control-plane

!

!

line con 0

no modem enable

line aux 0

line vty 0 4

login

!

scheduler max-task-time 5000

end

871 high CPU utilization

Ok, your NAT command is legit.

This may be an issue with the NAT table filling up, but highly unlikely as it is huge! Perhaps it is the connection timeouts...?

Initiate a large download and also attempt to acces other webpages and run the following commnads:

clear nat counters

clear ip nat translations

sh ip nat translations

sh ip nat stats

New Member

871 high CPU utilization

This seems to be OK:

Router#sh ip nat translations

Pro Inside global      Inside local       Outside local      Outside global

tcp 192.168.175.77:54154 192.168.12.2:54154 173.194.39.160:443 173.194.39.160:443

tcp 192.168.175.77:54169 192.168.12.2:54169 173.194.39.175:443 173.194.39.175:443

tcp 192.168.175.77:58310 192.168.12.2:58310 157.55.236.79:443 157.55.236.79:443

Router#sh ip nat translations

Pro Inside global      Inside local       Outside local      Outside global

tcp 192.168.175.77:54154 192.168.12.2:54154 173.194.39.160:443 173.194.39.160:443

tcp 192.168.175.77:54169 192.168.12.2:54169 173.194.39.175:443 173.194.39.175:443

tcp 192.168.175.77:54180 192.168.12.2:54180 93.115.243.142:80 93.115.243.142:80

tcp 192.168.175.77:58310 192.168.12.2:58310 157.55.236.79:443 157.55.236.79:443

udp 192.168.175.77:59642 192.168.12.2:59642 8.8.8.8:53       8.8.8.8:53

Router#sh ip nat translations

Pro Inside global      Inside local       Outside local      Outside global

udp 192.168.175.77:52575 192.168.12.2:52575 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:53183 192.168.12.2:53183 8.8.8.8:53       8.8.8.8:53

tcp 192.168.175.77:54154 192.168.12.2:54154 173.194.39.160:443 173.194.39.160:443

tcp 192.168.175.77:54158 192.168.12.2:54158 173.194.39.183:443 173.194.39.183:443

tcp 192.168.175.77:54160 192.168.12.2:54160 173.194.112.138:443 173.194.112.138:443

tcp 192.168.175.77:54161 192.168.12.2:54161 173.194.39.175:443 173.194.39.175:443

tcp 192.168.175.77:54164 192.168.12.2:54164 173.194.39.167:443 173.194.39.167:443

tcp 192.168.175.77:54167 192.168.12.2:54167 173.194.39.163:443 173.194.39.163:443

tcp 192.168.175.77:54169 192.168.12.2:54169 173.194.39.175:443 173.194.39.175:443

tcp 192.168.175.77:54180 192.168.12.2:54180 93.115.243.142:80 93.115.243.142:80

tcp 192.168.175.77:54181 192.168.12.2:54181 157.55.152.112:80 157.55.152.112:80

tcp 192.168.175.77:54182 192.168.12.2:54182 157.55.152.112:80 157.55.152.112:80

tcp 192.168.175.77:54183 192.168.12.2:54183 131.253.61.80:443 131.253.61.80:443

tcp 192.168.175.77:54184 192.168.12.2:54184 199.7.54.72:80   199.7.54.72:80

tcp 192.168.175.77:54185 192.168.12.2:54185 199.7.54.72:80   199.7.54.72:80

Pro Inside global      Inside local       Outside local      Outside global

tcp 192.168.175.77:54186 192.168.12.2:54186 23.37.248.70:443 23.37.248.70:443

tcp 192.168.175.77:54188 192.168.12.2:54188 131.253.61.80:443 131.253.61.80:443

tcp 192.168.175.77:54189 192.168.12.2:54189 131.253.61.80:443 131.253.61.80:443

tcp 192.168.175.77:54190 192.168.12.2:54190 95.100.217.28:443 95.100.217.28:443

tcp 192.168.175.77:54191 192.168.12.2:54191 95.100.217.28:443 95.100.217.28:443

tcp 192.168.175.77:54192 192.168.12.2:54192 95.100.217.28:443 95.100.217.28:443

udp 192.168.175.77:54445 192.168.12.2:54445 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:54697 192.168.12.2:54697 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:54798 192.168.12.2:54798 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:55941 192.168.12.2:55941 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:56085 192.168.12.2:56085 148.198.145.2:161 148.198.145.2:161

tcp 192.168.175.77:58310 192.168.12.2:58310 157.55.236.79:443 157.55.236.79:443

udp 192.168.175.77:58369 192.168.12.2:58369 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:59642 192.168.12.2:59642 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:59723 192.168.12.2:59723 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:60652 192.168.12.2:60652 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:62945 192.168.12.2:62945 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:63514 192.168.12.2:63514 8.8.8.8:53       8.8.8.8:53

udp 192.168.175.77:64679 192.168.12.2:64679 8.8.8.8:53       8.8.8.8:53

Router#sh ip nat statistics

Total active translations: 48 (0 static, 48 dynamic; 48 extended)

Peak translations: 5255, occurred 00:40:46 ago

Outside interfaces:

  Vlan1

Inside interfaces:

  Vlan192

Hits: 1562425  Misses: 0

CEF Translated packets: 1558765, CEF Punted packets: 3661

Expired translations: 18884

Dynamic mappings:

-- Inside Source

[Id: 1] access-list NAT_ACL interface Vlan1 refcount 48

Appl doors: 0

Normal doors: 0

Queued Packets: 0

Re: 871 high CPU utilization

Something about you nat translations doesn't look right. what's the output from:

sh ip int br

New Member

871 high CPU utilization

Router#sh ip inter brief

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0              unassigned      YES unset  up                    up

FastEthernet1              unassigned      YES unset  up                    up

FastEthernet2              unassigned      YES unset  up                    down

FastEthernet3              unassigned      YES unset  up                    down

FastEthernet4              unassigned      YES NVRAM  administratively down down

NVI0                       unassigned      YES unset  administratively down down

Vlan1                      192.168.175.77  YES DHCP   up                    up

Vlan192                    192.168.12.1    YES NVRAM  up                    up

871 high CPU utilization

That checks out too.

Do you know what your download speed hits when all other internet access goes? If it is anywhere near 12.5Mbps then you have hit the limit of the router.

At that point I'm not sure how it will prioritse requests. Looks like FIFO so it maintains your download but drops everything else.

New Member

871 high CPU utilization

My download speed is arorund 300 kbps.

If I download a smaller file (90 MB) everything works fine. The problem appears only with large files.

871 high CPU utilization

So if you choose a +100Mb as soon as you start the download the internet is in accessible to other users? Or is is it once you manage to download 100mb+ that the internet becomes unavailable to other users.

If it is the latter then it sounds like a buffer or maybe NAT table issue.

Although I suprised no other 871 users have raised this issue!

New Member

871 high CPU utilization

The problem appears immediatly after I start the download. If I try to download a big file directly form the browser the processor goes up even before I press the "Save File" button.

I have 2 routers (same model) and the issue is the same on both.

871 high CPU utilization

OK my final suggestion

Why have you got the following defined in vlan1:

ip tcp adjust-mss 1360

...if you can't accoutnfor it's includion in the config, then maybe try removing it:

!

int vlan1

no ip tcp adjust-mss 1360

!

...see if that makes a difference.

Hall of Fame Super Gold

871 high CPU utilization

Seb Rupik wrote:

OK my final suggestion

Why have you got the following defined in vlan1:

ip tcp adjust-mss 1360

...if you can't accoutnfor it's includion in the config, then maybe try removing it:

!

int vlan1

no ip tcp adjust-mss 1360

!

...see if that makes a difference.

That does not change anything. Adjust-mss is for PPPoE connections, not performance.

New Member

871 high CPU utilization

I even tryed to upgrade the ram. I have just installed a 64 M on the router. I know have 192M. Still the same problem.

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