© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
272727
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
High CPU Usage-Supervisor II
Console> (enable) show proc cpu
(truncated)
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
--- ----------- ---------- -------- ------- ------- ------- --- ---------------
(truncated)
98 23438905 7904296 9352 86.64% 89.57% 87.50% 0 Switching overhead
99 2271479 1443242 57968 1.19% 1.04% 0.98% 0 Admin overhead
Remember: Kernel and Idle CPU Usage Is the Percentage of Time the CPU Was Idle
Console> (enable) sh proc cpu
(truncated)
CPU utilization for five seconds: 14.45%
one minute: 15.00%
five minutes: 15.00%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
--- ----------- ---------- -------- ------- ------- ------- --- ---------------
1 345976604 0 0 85.55% 85.00% 85.00% -2 Kernel and Idle
282828
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
High CPU Usage-Supervisor II
• Switching overhead
Address learning (path setup) for new MAC addresses
Normal host entry aging, as well as fast aging due to reception of
STP topology Change notification
Packet processing for control traffic such as STP BPDUs, CDP,
VTP, DTP, PAgP, and so forth
Packet processing for management traffic such as telnet, SNMP,
and HTTP
• Admin overhead
Switch fabric Application Specific Integrated Circuit (ASIC) and
other hardware management
Line card ASIC management
Port monitoring
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