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Very High CPU (PM Callback) on 4500 with VOIP

stephen.howard
Level 1
Level 1

We are running Cat4500s with five WS-X4248-RJ45V cards fully configured for 802.3af power to Avaya 4610 IP phones. SW is IOS 12.2(18)EW

The problem I'm having is that CPU utilisation is sitting at 100% constantly apart from brief reductions to 85% (5sec/minute).

The vast majority of this is the PM Callback process (see show proc cpu below)

If anyone has any ideas on why this should be so or can point me towards documentation I'd be very grateful.

Stephen Howard

Networking Professional

NHS Scotland

Outputs:

sh proc cpu

0.00% 0.00% 0.00% 0 Chunk Manager

0.00% 0.00% 0.00% 0 Load Meter

0.00% 0.00% 0.00% 0 SpanTree Helper

0.00% 0.00% 0.00% 0 Deferred Events

0.00% 0.05% 0.05% 0 Check heaps

0.00% 0.00% 0.00% 0 Pool Manager

0.00% 0.00% 0.00% 0 Timers

0.00% 0.00% 0.00% 0 Serial Backgroun

0.00% 0.00% 0.00% 0 IPC Dynamic Cach

0.00% 0.00% 0.00% 0 IPC Zone Manager

0.00% 0.00% 0.00% 0 IPC BackPressure

0.00% 0.00% 0.00% 0 IPC Periodic Tim

0.00% 0.00% 0.00% 0 IPC Deferred Por

0.00% 0.00% 0.00% 0 IPC Seat Manager

0.00% 0.00% 0.00% 0 IFS Agent Manage

0.07% 0.08% 0.07% 0 ARP Input

0.00% 0.00% 0.00% 0 Entity MIB API

0.00% 0.00% 0.00% 0 SERIAL A'detect

0.00% 0.00% 0.00% 0 Dynamic ARP Insp

0.00% 0.00% 0.00% 0 HC Counter Timer

0.00% 0.00% 0.00% 0 Critical Bkgnd

0.15% 0.02% 0.00% 0 Net Background

0.00% 0.00% 0.00% 0 Logger

0.00% 0.00% 0.00% 0 TTY Background

0.07% 0.02% 0.01% 0 Per-Second Jobs

0.00% 0.02% 0.00% 0 Per-minute Jobs

12.13% 13.76% 13.38% 0 Cat4k Mgmt HiPri

5.11% 22.14% 21.36% 0 Cat4k Mgmt LoPri

0.00% 0.00% 0.00% 0 Galios Reschedul

0.00% 0.00% 0.00% 0 IOS ACL Helper

0.00% 0.00% 0.00% 0 NAM Manager

0.00% 0.00% 0.00% 0 rf task

0.00% 0.00% 0.00% 0 Net Input

0.07% 0.01% 0.00% 0 Compute load avg

0.00% 0.00% 0.00% 0 AggMgr Process

0.00% 0.00% 0.00% 0 SFF8472

0.00% 0.00% 0.00% 0 AAA Dictionary R

2.23% 2.50% 2.50% 0 Spanning Tree

0.15% 0.06% 0.06% 0 DTP Protocol

0.00% 0.00% 0.00% 0 Ethchnl

0.07% 0.01% 0.00% 0 UDLD

0.00% 0.00% 0.00% 0 DHCP Snooping

0.00% 0.00% 0.00% 0 Port-Security

0.00% 0.00% 0.00% 0 IP Input

0.00% 0.09% 0.11% 0 CDP Protocol

0.00% 0.00% 0.00% 0 DiagCard6/-1

0.00% 0.00% 0.00% 0 CEF Scanner

0.00% 0.00% 0.00% 0 IP IRDP

0.00% 0.00% 0.00% 0 Adj Manager

0.00% 0.00% 0.00% 0 CEF process

0.00% 0.00% 0.00% 0 L2MM

0.00% 0.00% 0.00% 0 MRD

0.00% 0.00% 0.00% 0 IGMPSN

0.00% 0.00% 0.00% 0 Socket Timers

0.00% 0.00% 0.00% 0 L2TRACE SERVER

0.00% 0.00% 0.00% 0 ATIP_UDP_TSK

0.00% 0.00% 0.00% 0 TCP Timer

5Sec 1Min 5Min TTY Process

0.00% 0.00% 0.00% 0 TCP Protocols

0.00% 0.00% 0.00% 0 Probe Input

0.00% 0.00% 0.00% 0 RARP Input

0.00% 0.00% 0.00% 0 HTTP Timer

0.00% 0.00% 0.00% 0 DHCPD Receive

0.00% 0.00% 0.00% 0 IP Background

0.00% 0.00% 0.00% 0 IP RIB Update

0.00% 0.00% 0.00% 0 IP Cache Ager

0.00% 0.00% 0.00% 0 COPS

0.00% 0.00% 0.00% 0 NTP

79.87% 17.41% 36.74% 0 PM Callback

0.00% 0.71% 0.57% 0 VLAN Manager

0.00% 0.00% 0.00% 0 DHCPD Timer

0.00% 0.00% 0.00% 0 VTP Trap Process

0.00% 0.00% 0.00% 0 DiagCard1/-1

0.00% 0.00% 0.00% 0 DiagCard2/-1

0.00% 0.00% 0.00% 0 DiagCard3/-1

0.00% 0.00% 0.00% 0 DiagCard4/-1

0.00% 0.00% 0.00% 0 DiagCard5/-1

0.00% 0.00% 0.00% 1 Virtual Exec

0.00% 0.00% 0.00% 0 Syslog Traps

0.00% 0.00% 0.00% 0 VTPMIB EDIT BUFF

0.00% 0.00% 0.00% 0 SPAN switch

0.00% 0.00% 0.00% 0 SNMP Timers

0.00% 0.00% 0.00% 0 IP SNMP

0.00% 0.00% 0.00% 0 PDU DISPATCHER

0.00% 0.00% 0.00% 0 SNMP ENGINE

0.00% 0.00% 0.00% 0 SNMP ConfCopyPro

0.00% 0.00% 0.01% 0 SNMP Traps

0.00% 0.00% 0.00% 0 DHCPD Database

0.00% 0.00% 0.00% 0 System polling

2 Replies 2

stephen.howard
Level 1
Level 1

...and here's a proc cpu history and module just to colour the picture in.

SW001GS#sh proc cpu history

1 1111111111 11111111111111111111111111111111111111

0999990000000000999900000000000000000000000000000000000000

0999990000000000999900000000000000000000000000000000000000

100 **********************************************************

90 **********************************************************

80 **********************************************************

70 **********************************************************

60 **********************************************************

50 **********************************************************

40 **********************************************************

30 **********************************************************

20 **********************************************************

10 **********************************************************

0....5....1....1....2....2....3....3....4....4....5....5....

0 5 0 5 0 5 0 5 0 5

CPU% per second (last 60 seconds)

111111 111111111111111111111111111111111111111111111111111

0000009000000000000000000000000000000000000000000000000000

0000009000000000000000000000000000000000000000000000000000

100 ###****#######****###******##***#*#*#*####################

90 ###****########***#####***####*###########################

80 ###****#########*#######*#################################

70 ###**#*###################################################

60 ######*###################################################

50 ##########################################################

40 ##########################################################

30 ##########################################################

20 ##########################################################

10 ##########################################################

0....5....1....1....2....2....3....3....4....4....5....5....

0 5 0 5 0 5 0 5 0 5

CPU% per minute (last 60 minutes)

* = maximum CPU% # = average CPU%

1111111111111

0000000000000

0000000000000

100 *#****#*****#

90 #############

80 #############

70 #############

60 #############

50 #############

40 #############

30 #############

20 #############

10 #############

0....5....1....1....2....2....3....3....4....4....5....5....6....6....7.

0 5 0 5 0 5 0 5 0 5 0 5 0

CPU% per hour (last 72 hours)

* = maximum CPU% # = average CPU%

SH Mod

Chassis Type : WS-C4506

Power consumed by backplane : 10 Watts

Mod Ports Card Type Model Serial No.

---+-----+--------------------------------------+------------------+-----------

1 2 1000BaseX (GBIC) Supervisor(active) WS-X4515 JAE080205R1

2 48 10/100BaseTX (RJ45)V, Cisco/IEEE WS-X4248-RJ45V JAB07520700

3 48 10/100BaseTX (RJ45)V, Cisco/IEEE WS-X4248-RJ45V JAB075108YJ

4 48 10/100BaseTX (RJ45)V, Cisco/IEEE WS-X4248-RJ45V JAB075206PD

5 48 10/100BaseTX (RJ45)V, Cisco/IEEE WS-X4248-RJ45V JAB075206P3

6 48 10/100BaseTX (RJ45)V, Cisco/IEEE WS-X4248-RJ45V JAB075206ZY

hiersd
Level 1
Level 1

This sounds similar to a known hw problem. Work the hw replacement angle pretty hard.

David