Cisco Router 826 Routers Software Configuration Guide

  
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Chapter 1      Concepts
QoS
The gatekeeper maintains a registry of devices in the multimedia network. The devices register with the 
gatekeeper at startup and request admission to a call from the gatekeeper. The gatekeeper is an H.323 
entity on the LAN that provides address translation and control access to the LAN for H.323 terminals 
and gateways. The gatekeeper may...

  
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Chapter 1      Concepts
QoS
QoS must be configured throughout your network, not just on your router running VoIP, to improve voice 
network performance. Not all QoS techniques are appropriate for all network routers. Edge routers and 
backbone routers in your network do not necessarily perform the same operations; the QoS tasks they 
perform might differ as well. To...

  
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Chapter 1      Concepts
Access Lists
RSVP
RSVP enables routers to reserve enough bandwidth on an interface to ensure reliability and quality 
performance. RSVP allows end systems to request a particular QoS from the network. Real-time voice 
traffic requires network consistency. Without consistent QoS, real-time traffic can experience jitter, 
insufficient bandwidth,...

  
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Chapter 1      Concepts
Access Lists 

CHAPTER
  
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2
Network Scenarios
This chapter includes some example network scenarios and their configurations using Cisco 827 and 
Cisco 827-4V routers and Cisco 831, Cisco 836, Cisco 837, Cisco SOHO 91, Cisco SOHO 96, and 
Cisco SOHO 97 routers. This chapter is useful if you are building a new network and want some 
guidance. Most of the lessons here can be applied as well...

  
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Chapter 2      Network Scenarios
Cisco 827 Router Network Connections
Cisco 827 Router Network Connections
Figure 2-1 illustrates an example network topology employing Cisco 827 routers connecting to the 
following:
Public switched telephone network (PSTN)
Corporate intranet
Service provider on the Internet
Service provider data center
Figure 2-1 Cisco 827 Routers...

  
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Chapter 2      Network Scenarios
Cisco 831 Router Virtual Private Network Connections
In the example, Cisco 827 routers send data or voice packets from the remote user to the service provider 
or corporate network through a high-speed, point-to-multi-point asymmetric digital subscriber line 
(ADSL) technology. 
Cisco 831 Router Virtual Private Network Connections
Figure...

  
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Chapter 2      Network Scenarios
Cisco 836 or Cisco SOHO 96 Network Connection
Cisco 836 or Cisco SOHO 96 Network Connection
Figure 2-3 shows an example of a network topology employing a Cisco 836 router or a Cisco SOHO 96 
router connecting to the following:
ISDN
Corporate intranet
Service provider on the Internet
Service provider data center
Dial backup and...

  
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Chapter 2      Network Scenarios
Cisco 837 Router Network Connections
Cisco 837 Router Network Connections
Figure 2-4 shows an example of a network topology employing a Cisco 837 router connecting to the 
following:
PSTN
Corporate intranet
Service provider on the Internet
Service provider data center
Dial backup and remote management
Figure 2-4 Cisco 837 Router...

  
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Chapter 2      Network Scenarios
Internet Access Scenarios
Internet Access Scenarios
Each network access scenario is described with a network diagram, configuration steps for setting up the 
network, and an example configuration. 
Before You Configure Your Internet Access Network
You need to gather the following information before configuring networks based on the...