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High CPU Processes on MPLS 2821

Hello

I have a 2821 router which 99% CPU load. I check show processes it indicate that the Pool Manager and IP Input causing a lot of problem.

Can anyone help? Thanks

R-MPLS#sh proc

Load for five secs: 99%/29%; one minute: 99%; five minutes: 98%

Time source is NTP, 20:13:41.017 WST Thu Sep 1 2011

CPU utilization for five seconds: 99%/29%; one minute: 99%; five minutes: 98%

PID QTy       PC Runtime (ms)    Invoked   uSecs    Stacks TTY Process

   1 Cwe 400AB0A4            0          3       0 5672/6000   0 Chunk Manager

   2 Csp 4008F0D0       864168    5429090     159 2524/3000   0 Load Meter

   3 Mwe 41FEF484      2620732    9724423     269 4324/6000   0 LDP

   4 Mwe 421EE1E0            0          1       023372/24000  0 EDDRI_MAIN

   5 Lst 400A7F68     26159996    2804359    9328 5392/6000   0 Check heaps

   6 Cwe 400AF138   1401703808  252355086    5554 5480/6000   0 Pool Manager

   7 Mst 411497AC            0          2       0 5496/6000   0 Timers

   8 Mwe 401124D0         1396     452412       3 5704/6000   0 IPC Dynamic Cach

   9 Mwe 401034B0            0          1       0 5700/6000   0 IPC Zone Manager

  10 Mwe 40102658       111056   27104550       4 5616/6000   0 IPC Periodic Tim

  11 Mwe 401024AC        97876   27104559       3 5640/6000   0 IPC Deferred Por

  12 Mwe 4010318C            0          1       0 5564/6000   0 IPC Seat Manager

  13 Mwe 4010873C            0          1       0 5668/6000   0 IPC BackPressure

  14 Mwe 40259448            0          1       011668/12000  0 OIR Handler

  15 Mwe 402F8624            0          1       023604/24000  0 Crash writer

  16 Msi 403F98BC       131256     904780     145 5496/6000   0 Environmental mo

  17 Mwe 40C68CC4       187904    1520583     123 4748/6000   0 ARP Input

  18 Mwe 40CCB688            0          2       0 5444/6000   0 ATM Idle Timer

.....

  76           0         1          0  0.00%  0.00%  0.00%   0 ACCT Periodic Pr

  77      227924   3423030         66  0.00%  0.00%  0.00%   0 CDP Protocol

  78  2524663424-1614061345          0 37.66% 37.35% 36.58%   0 IP Input

  79           0         1          0  0.00%  0.00%  0.00%   0 ICMP event handl

  80           0         4          0  0.00%  0.00%  0.00%   0 TurboACL

  81           0         2          0  0.00%  0.00%  0.00%   0 TurboACL chunk

....

195   470407752-1600026626          0  2.52%  2.60%  2.57%   0 Tag Input

196       45592   2714562         16  0.00%  0.00%  0.00%   0 Tag Control

197     4516012  18962892        238  0.00%  0.00%  0.00%   0 IP SNMP

198     1287372   9446713        136  0.08%  0.00%  0.00%   0 PDU DISPATCHER

199     8860360   9514382        931  0.00%  0.02%  0.02%   0 SNMP ENGINE

200           0         2          0  0.00%  0.00%  0.00%   0 IP SNMPV6

201           0         1          0  0.00%  0.00%  0.00%   0 SNMP ConfCopyPro

202           0         1          0  0.00%  0.00%  0.00%   0 SNMP Traps

203      217736  27357624          7  0.00%  0.00%  0.00%   0 NTP

204           0        11          0  0.00%  0.00%  0.00%   0 AAA Accounting

205           0         3          0  0.00%  0.00%  0.00%   0 IP-EIGRP: PDM

206      674216   5865759        114  0.00%  0.00%  0.00%   0 IP-EIGRP: PDM

207      471488  57875748          8  0.00%  0.00%  0.00%   0 BGP Router

208           0        75          0  0.00%  0.00%  0.00%   0 Tagcon Addr

209           0         1          0  0.00%  0.00%  0.00%   0 IP-EIGRP: HELLO

210      789664  11731560         67  0.00%  0.00%  0.00%   0 IP-EIGRP: HELLO

211      283860   2693814        105  0.00%  0.00%  0.00%   0 BGP I/O

212     3950944   1811980       2180  0.00%  0.00%  0.00%   0 BGP Scanner

R-MPLS#

R-MPLS#

R-MPLS#

R-MPLS#sh ver

Load for five secs: 99%/29%; one minute: 99%; five minutes: 98%

Time source is NTP, 20:13:04.136 WST Thu Sep 1 2011

Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version 12.4(25a), RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2009 by Cisco Systems, Inc.

Compiled Fri 22-May-09 22:00 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

R-MPLS uptime is 44 weeks, 6 days, 4 hours, 23 minutes

System returned to ROM by Reload Command

System restarted at 15:38:57 WST Fri Oct 22 2010

System image file is "flash:c2800nm-spservicesk9-mz.124-25a.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

Cisco 2821 (revision 53.51) with 251904K/10240K bytes of memory.

Processor board ID FHK1246F32R

2 Gigabit Ethernet interfaces

DRAM configuration is 64 bits wide with parity enabled.

239K bytes of non-volatile configuration memory.

62720K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

R-MPLS#

Everyone's tags (3)
2 REPLIES 2
VIP Expert

High CPU Processes on MPLS 2821

Hi,

Have a look at the release notes.  The high CPU issue was supposed to be resolved in 12.2(25a), but may still be there.

Resolved Caveats—Cisco IOS Release 12.4(25a)

Cisco IOS Release 12.4(25a) is a rebuild release for Cisco IOS  Release 12.4(25). The caveats in this section are resolved in Cisco IOS  Release 12.4(25a) but may be open in previous Cisco IOS releases.

CSCek77849

Symptoms: BGP convergence is very slow, and CPU utilization at BGP  router process can reach 100% during the convergence at aggregation  router. During normal operation, if BGP prefixes included in the  aggregation flap, it will also produce high CPU utilization.

This issue shows the following tendencies:

1) The more of the component prefixes belonging to the aggregate-address  entry, the slower the convergence at aggregation router. 2) The more of  the duplicated aggregation component prefixes for aggregate- address  entry, the slower convergence at aggregation router.

Conditions: Any releases would be affected if "aggregate-address" is  configured, and routing updates involving aggregate components are  received every few seconds.

Workaround: Remove the "aggregate-address".

Here is the doc:

http://www.cisco.com/en/US/docs/ios/12_4/release/notes/124MCAVS.html#wp312957

HTH

Hall of Fame Cisco Employee

Re: High CPU Processes on MPLS 2821

Hi Steven,

In addition to Reza's great reply, please have a close look at the following documents about troubleshooting high CPU load particularly with regard to the IP Input process, and on routers generally. It is possible that you are hitting one of the situations described in these docs.

http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af3.shtml

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00800a70f2.shtml

I assume you are running wth IP CEF activated. Running without CEF can be a major source of these problems, so I am better asking to be sure.

Best regards,

Peter

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