Central Processing Unit

The CPU is the heart of a router, and every Cisco router has a CPU. A CPU manages all the router's processes, such as IP routing, and new routing entries, such as remote IP networks learned through a dynamic routing protocol.

To view a CPU's status, use the show process IOS command.

Example 3-2 shows a sample display taken from a Cisco IOS router.

Example 3-2 (Truncated) show process Command R1>show process

CPU utilization for five seconds: 9%/7%; one minute: 9%; five minutes: 10%

Example 3-2 (Truncated) show process Command R1>show process

CPU utilization for five seconds: 9%/7%; one minute: 9%; five minutes: 10%

PID QTy

PC

Runtime

(ms)

Invoked

uSecs Stacks

TTY Proc

1 Csp

318F396

24456

1043

234

732/1000 0

Load Meter

2 M*

0

28

28

1000

3268/4000 0

EXEC

3 Lst

317D1FC

1304

175

5257

1724/2000 0

Check heap

The show process command displays the router utilization within the past 5 seconds, the past 1 minute, as well as the average over the last 5 minutes. Details about specific processes follow the CPU utilization statistics.

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