Cisco 827 - 827 Router - EN Manual de usuario descargar pdf (Pagina 26)

Network Scenarios Pagina 26 di 35

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_fix/827/827swcfg/ntwkscen.htm 14/02/2001

The 3640 router is set up on the LAN as a gatekeeper, which provides address translation and control

access for the LAN for H.323 terminals and gateways. The gatekeeper may provide other services to

the H.323 terminals and gateways, such as managing bandwidth and locating gateways.

In this scenario, the dial endpoint is the 3640 router, with an IP address of 172.17.1.36 and a subnet

mask of 255.255.255.0. This configuration assumes a single-zone setup so that both the 827-4V and the

3640 router are in the same zone.

Dialed numbers are stored by the VoIP session application in the 827-4V router, in this case H.323.

After enough digits are accumulated to match a configured destination pattern, the telephone number is

mapped to a dial peer and session target. In this configuration, the dial peer has a session target of RAS,

which is a protocol run between the H.323 session protocol gateway and gatekeeper.

The gatekeeper resolves the destination for each dialed number, and the call signal routes to the 3640

gateway, which assigns the call to a voice port.

The coder-decoder compression schemes (codecs) are enabled for both ends of the connection and

QoS parameters are configured for IP precedence.

Configuration Tasks

To configure the voice scenario, you must configure the data network and then the voice network.

l Configure the data network:

¡ Configuring the class map, route map, and policy map

¡ Configuring the Ethernet interface

¡ Configuring the ATM interface

¡ Configuring Enhanced IGRP

l Configure the voice network:

¡ Configuring the POTS dial peers

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Cisco 827 - 827 Router - EN Manual de usuario Pagina 26