Cisco Router 826 Routers Software Configuration Guide

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring IP Security and GRE Tunneling
Configuring a GRE Tunnel Interface
Follow the steps below to configure the generic routing encapsulation (GRE) tunnel interface, starting 
in global configuration mode.
Configuring the Ethernet Interfaces
Perform the following tasks to configure the Ethernet 0 and Ethernet 1 interfaces,...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring IP Security and GRE Tunneling
Configuring Static Routes
Follow the steps below to configure static routes, starting in global configuration mode.
Configuring and Monitoring High-Speed Crypto
Use the following command to enable high-speed crypto, starting with global configuration mode. 
crypto engine accelerator
To...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring IP Security and GRE Tunneling
ip subnet-zero
!
ip audit notify log
ip audit po max-events 100
!
crypto isakmp policy 1
encr 3des
authentication pre-share
crypto isakmp key grel address 100.1.1.1
!
crypto ipsec security-association lifetime seconds 86400
!
crypto ipsec transform-set strong esp-3des esp-sha-hmac
!...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Multilink PPP Fragmentation and Interleaving
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
ip subnet-zero
!
ip audit notify log
ip audit po max-events 100
ip ssh time-out 120
ip ssh authentication-retries 3
!
crypto isakmp policy 1
encr 3des
authentication pre-share
crypto isakmp...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Multilink PPP Fragmentation and Interleaving
For complete information on the PPP fragmentation and interleaving commands, see the Dial Solutions 
Configuration Guide for Cisco IOS Release 12.0T. For general information on PPP fragmentation and 
interleaving concepts, see Chapter 1, “Concepts.” 
Configuration...

  
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Chapter 3      Basic Router Configuration
Configuring IP Precedence
Verifying Your Configuration
To verify that you have properly configured PPP fragmentation and interleaving, enter the debug ppp 
multilink fragment command, and then send out one 1500-byte ping packet. The debug message will 
display information about the fragments being transmitted.
Configuring IP...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Voice
Configuring Voice
The Cisco 827 routers support voice using the H.323 signaling protocol.
H.323
SGCP
The default signaling protocol is H.323 signaling standard.
Prerequisite Tasks
Before you can configure your router to use voice, you need to perform the following tasks:
Establish a working IP network....

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Voice
Configuring Voice Ports for H.323 Signaling
Voice port configuration should be automatic in the United States, however, if you are overseas, you may 
need to do the following voice port configuration, beginning in global configuration mode.
For complete information on the dial peer commands, see the Cisco IOS...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Voice
After you have configured dial peers and assigned destination patterns to them, enter the show dialplan 
number command to see how a telephone number maps to a dial peer. 
For complete information on the number expansion commands, see the Cisco IOS documentation set.
Configuration Example
This configuration...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Cisco 827 Routers Configuration Examples
exec-timeout 0 0
transport input none
stopbits 1
line vty 0 4
login
!
!
voice-port 1
local-alerting
timeouts call-disconnect 0
!
voice-port 2
local-alerting
timeouts call-disconnect 0
!
voice-port 3
local-alerting
timeouts call-disconnect 0
!
voice-port 4
local-alerting
timeouts...