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High CPU utilization on Catalyst 6500

Folks,

We have a 6500 series switch with Sup1A in it, i see the CPU utilization is quite high and a lot of it has to do with spanning stree, would someone have any recommendations?

CPU usage information:

Name CPU-Usage Invocations

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

Kernel and Idle 38% 3154953855

Flash MIB Updat 0% 70

L2IntHdlr 0% 1

EobRecoveryProc 0% 2642431

SynDiags 0% 2200

GenMsgHndlr 0% 168

SynConfig 0% 44460367

TempMon 0% 3534225

System_CrashInf 0% 1

IDLE_Tasks 7% 465648186

PowerMgmt 0% 19688608

M-MLS_stats 0% 1

SL_TASK 0% 584051834

RedundantTask 0% 12492621

Status Poll 0% 16871723

SWPoll64bCnt 0% 550501

RouterConfig 0% 47505608

DeviceLinkChk 3% 6231561

HavailTask 0% 2231

SyncTask 0% 5881747

Earl 0% 13141412

TablefullTask 0% 5310382

DTP_Rx 0% 3330184

EthChnlRx 0% 31374

llcSSTPFlood 0% 1

EthChnlConfig 0% 38433

SecurityRx 0% 236149

ACL 0% 135

DhcpSnooping 0% 5682147

Authenticator_S 0% 1265466913

dot1x_rx 0% 2

Backend_Rx 0% 13714964

Backend_SM 0% 947711021

Radius Acct Pro 0% 13718252

Dot1x_Dhcp 0% 1

GrpManager 1% 2379974919

NetFlow 0% 10891

L3Aging 0% 38027291

MlsHa 0% 1863093

SptTimer 0% 6583289

SptBpduRx 0% 2226

SptBpduTx 23% 16066007

sptTraps 0% 2

GL2Prot_Tunnel 0% 2

VtpTimer 0% 6630836

Read Stats Task 0% 27541256

QDE Task 0% 1321193

BcastSuppr Task 0% 1867430

NvramMonitor 0% 7343

cdpd 0% 4180141

cdpdtimer 1% 6555088

sptTraps 0% 1

ProtocolFilter 0% 655489

MacMoveNotTask 0% 1

connecthelper 0% 56

telnetd 0% 56

tftpd 0% 1

ProtocolTimer 0% 92163184

ciscoRmonTimer 0% 655505

ciscoUsrHistory 0% 655505

rmonMediaIndep 0% 1

SnmpTraps 0% 891

memPoolMain 0% 1311010

Acct Send Bkg 0% 1

l2t_server 0% 1

gentcp_act 0% 2

SysLogTask 1% 1262753922

pinggateA 0% 6299575

Debug Port Coun 0% 48480

show_command 17% 21836

RMON AlarmTimer 0% 1

M-MLS_manager 0% 2

HPActive 0% 1

HPTrapMgr 0% 1

QoSTask 0% 54971

GBIC Process 0% 12463119

VtpRx 0% 107096

Console 0% 1025473

snmpdm 0% 46093896

SNMP_THREAD 1% 46650834

telnet147 0% 96

AclManager 0% 1324932

1 REPLY
Cisco Employee

Re: High CPU utilization on Catalyst 6500

How many instances of STP do you have? Check for your trunks and clear unwanted VLANs and see if it makes any difference.

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