Cisco Router 826 Routers Software Configuration Guide

  
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Chapter 3      Basic Router Configuration
Configuring an Extended Access List
administered in a central database rather than in individual routers. TACACS+ also provides support for 
separate modular authentication, authorization, and accounting (AAA) facilities that are configured at 
individual routers.
To configure your router to support TACACS+, you must perform...

  
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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 Quality of Service Parameters
For more complete information on the extended access list commands, see the Cisco IOS Release 12.2 
documentation set. For information on TCP and UDP port assignments, see Appendix C, “Common Port 
Assignments.”
Configuration Example
This configuration shows an access list being applied...

  
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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 Quality of Service Parameters
Configuring a Single PVC Environment
In the single PVC environment, the traffic relies on Cisco IOS to provide priority queuing (using 
CBWFQ). The tasks to configure a single PVC environment are:
Configuring IP precedence 5 for voice packets
Configuring an access list and voice...

  
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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 Quality of Service Parameters
Configure a Policy Map and Specify Voice Queuing
Follow the steps below to configure a policy map and to specify voice queuing, beginning in global 
configuration mode.
Configuring a Policy Map and Specifying Priority Queuing for Voice Class
To associate the policy map to the ATM PVC...

  
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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 Quality of Service Parameters
Configuration Example
The following example shows a voice QoS configuration in a single PVC environment using 
AAL5SNAP encapsulation.
!
dial-peer voice 105 voip 
destination-pattern 3.. 
session target ipv4:10.1.2.3 
ip precedence 5
access-list 101 permit ip any any precedence...

  
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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 Quality of Service Parameters
Voice and Data on Different Subnets
Figure 3-2 shows voice and data packets on different subnets. You can have all voice traffic on an ATM 
PVC with a VBR-RT service class while the data traffic is transported on an ATM PVC with a UBR 
service class.
Figure 3-2 Voice and Data on...

  
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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 Quality of Service Parameters
Configuration Example 
The following example shows a voice QoS configuration with all data traffic on the 30.0.0.1 network and 
all voice traffic on the 20.0.0.1 network. 
You do not need to enter the commands marked “default.” These commands appear automatically in the 
configuration...

  
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Chapter 3      Basic Router Configuration
Configuring Quality of Service Parameters
Configuring the ATM Interface 
Use the following table to configure the ATM interface, beginning in global configuration mode.
Specifying IP Precedence and the Service Class for the Voice Network
To configure real-time voice traffic precedence over other IP network traffic, use the...

  
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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 Quality of Service Parameters
NoteIn IP precedence, the numbers 1 through 5 identify classes for IP flows; the numbers 6 through 7 are 
used for network and backbone routing and updates. It is recommended that IP precedence of 5 be used 
for voice packets.
Configuration Example
The following configuration shows both...

  
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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 Quality of Service Parameters
NoteYou can use the ip rtp reserve command instead of configuring RSVP. If you configure RSVP, this 
command is not required.
For complete information on the PPP fragmentation and interleaving commands, see the Dial Solutions 
Configuration Guide for Cisco IOS Release 12.2. For more...