Specifications

1-9

Cisco AS5x00 Case Study for Basic IP Modem Services

11/24/1999

Section 1 Network Design and Case Study Overview

Configuration Design Parameters

Figure 1-4 IP Subnetting Diagram

Note

This case study uses private RFC 1918 IP addresses. For more information, refer to the

following URL:

http://www.ietf.org/rfc/rfc1918.txt

For Maui Onions and THEnet, Table 1-5 through Table 1-7 describe the following:



IP subnetting plan



Device parameters



Dial plan

28312

Clients

Modems

Hq-access

172.22.66.0/26

NAS loopbacks

172.22.90.0/24

172.22.99.0/24

IP intranet

Internet

firewall

Internet

PSTN

Table 1-5 IP Subnetting Plan

Network Name Assigned Subnet Description

Headquarters

Block

172.22.0.0/17

The block of IP addresses reserved for the devices inside the

corporate network.

Remote block 172.22.128.0/17 The block of IP addresses reserved for the incoming

remote-node modem clients.

Hq-access 172.22.66.0/26 The headquarter’s access Ethernet subnet. All the access

devices are directly connected to this subnet.

If additional access servers and POP-management devices are

needed, they are assigned to this IP subnet. This approach

simplifies network design.