Cisco 827 - 827 Router - EN Uživatelský manuál stáhnout pdf (Strana 25)

Network Scenarios Pagina 25 di 35

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

Data Network

Figure 2-7 shows a data network with traffic routing through the 827 router and then switching onto the

ATM interface.

Figure 2-7: Data Network

The 827 router is connected through the ATM interface through one PVC and it is associated with a

QoS policy called mypolicy. Data traffic coming from the Ethernet must have an IP precedence below 5

(critical) to distinguish it from voice traffic.

Enhanced IGRP is configured to send hello packets every 5 seconds to inform neighboring routers that it

is functioning. If a particular router does not send a hello packet within a prescribed period, Enhanced

IGRP assumes that the state of a destination has changed and sends an incremental update.

NAT (represented as the dashed line at the edge of the 827 routers) signifies two addressing domains

and the inside source address. The source list defines how the packet travels through the network.

This scenario includes configuration tasks and a configuration example. To add additional features to this

network, refer to "Feature-By-Feature Router Configurations."

After configuring your router, you need to configure the PVC endpoint. For a general configuration

example, refer to "Cisco 3640 Gateway Configuration Example" at the end of this chapter.

Voice Network

Figure 2-8 shows a voice network with an 827-4V router and a 3640 router as the VoIP gateway using

H.323 signaling (H.323 gateway).

Figure 2-8: Voice Network

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Cisco 827 - 827 Router - EN Uživatelský manuál Strana 25