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2-11
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 2 Commissioning the Cisco AS5300 Hardware
Verifying Basic Setup
1.5 Inspecting CPU Utilization
Enter the
show processes cpu
command to investigate high CPU utilization. High utilization causes
network performance problems. For example, knowing when the router is running at over 50%
utilization is critical. The router might start dropping packets if an unexpected traffic burst comes
through or if OSPF gets recalculated. Fast switching reduces CPU utilization.
Router#show processes cpu
CPU utilization for five seconds: 1%/0%; one minute: 0%; five minutes: 0%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
1 0 18973 0 0.00% 0.00% 0.00% 0 Load Meter
2 44 122 360 0.57% 0.06% 0.01% 98 Virtual Exec
3 70388 12820 5490 0.00% 0.04% 0.05% 0 Check heaps
4 0 2 0 0.00% 0.00% 0.00% 0 Pool Manager
5 0 2 0 0.00% 0.00% 0.00% 0 Timers
6 0 2 0 0.00% 0.00% 0.00% 0 Serial Backgroun
7 68 1876 36 0.00% 0.00% 0.00% 0 ARP Input
8 8 22758 0 0.00% 0.00% 0.00% 0 HC Counter Timer
9 0 2 0 0.00% 0.00% 0.00% 0 DDR Timers
10 0 2 0 0.00% 0.00% 0.00% 0 Dialer event
11 4 2 2000 0.00% 0.00% 0.00% 0 Entity MIB API
12 0 1 0 0.00% 0.00% 0.00% 0 SERIAL A'detect
13 0 4 0 0.00% 0.00% 0.00% 0 Critical Bkgnd
14 3396 165554 20 0.00% 0.00% 0.00% 0 Net Background
15 8 43 186 0.00% 0.00% 0.00% 0 Logger
16 377776 94479 3998 0.40% 0.23% 0.24% 0 TTY Background
17 4 94488 0 0.00% 0.00% 0.00% 0 Per-Second Jobs
18 0 47432 0 0.00% 0.00% 0.00% 0 CSM periodical p
19 0 47435 0 0.00% 0.00% 0.00% 0 CSM timer proces
20 0 2 0 0.00% 0.00% 0.00% 0 CSM Tone process
21 0 6 0 0.00% 0.00% 0.00% 0 Call Management
. . .
Snip
Look at the top line of the output. If you see high utilization numbers, for example over 50%, inspect
the columns 5Sec, 1Min, and 5Min. Find the process that uses the most CPU power. For an idle chassis,
numbers larger than two percent indicate a problem.
- IP Modem Services 1
- Contents 4
- Introduction 7
- Scenario Description 7
- 11/24/1999 10
- Dial Planning Questionnaire 10
- Network Service Definition 11
- Table 1-1 Hardware 13
- Table 1-5 IP Subnetting Plan 16
- Verifying Basic Setup 23
- Inside a Cisco 28
- Configuring Cisco IOS Basics 32
- Table 2-3 Local AAA Commands 33
- Timesaver 36
- Enabling the T1 Controllers 38
- Table 2-6 Alarm Conditions 41
- Configuring Modems and Lines 44
- Table 2-9 IP Routing Commands 46
- Call-Processing Components 55
- DSC Troubleshooting Tips 63
- Component Description 71
- Table 3-5 Local AAA Commands 78
- 2.4 Configuring Basic IP 79
- Table 3-7 Alarm Conditions 85
- Table 3-9 IP Routing Commands 89
- Verifying Modem Performance 95
- Async DataComm Model 96
- RS-232 in Cisco IOS 98
- V.34 Basic Rules 102
- V.90 Basic Rules 103
- 5300-NAS# 5300-NAS# 105
- Tech Tip 106
- What to do Next 120
- In this Section 121
- Configuring IPCP Options 122
- Configuring LCP Options 123
- Enabling PPP Autoselect 124
- 6.1 Show Caller Statistics 130
- Inspecting Active Call States 131
- Modem Management Operations 137
- Managing Modem Firmware 138
- Task 2. Enabling Syslog 158
- Enabling Syslog 159
- Task 3. Enabling SNMP 160
- Enabling SNMP 161
- Table 7-3 SNMP Commands 162
- Cisco AS5300 Configuration 169
- Cisco AS5800 Configuration 172
- 11/24/99 177
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