Cisco 700 series Configuration Guide

Routing IP with a Cisco 700 Series Router to an ISP
Cisco 700 Series Router Configuration Guide
3-10
The example also uses an unnumbered IP address on the Cisco 700 series router and a
dynamically-assigned IP address from the ISP, a common practice used to conserve IP
addresses.
Figure 3-2 Connecting to an ISP–Example Configuration
In this example, a user-defined profile named isp is created, representing the ISP router.
Your router uses the isp profile to initiate the call to the ISP router.
When the Cisco 700 series router calls the ISP router, it sends the ISP the PPP host name,
the CHAP secrets, and PAP passwords, depending upon what the other router requires to
authenticate the call.
ISDN network
Ethernet (LAN) interface
IP address: 172.16.17.9
Subnet mask: 255.255.255.248
IP unnumbered
ISDN (WAN) interface
IP address: 0.0.0.0.
Subnetwork mask: 0.0.0.0.
Cisco 700 series router
system name: 765
CHAP secret: cisco
Central site router
System name: isp
H8757
Cisco 700
Central

Cisco 700 series Specifications

General

Wireless	No
Compression	No
WAN Ports	1
Weight	0.48 kg
Power Supply	External
Category	Network Router