3Com Dual 56K manual LAN Modem Site-to-Site Dial-in Profile Type

98CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT

This is because the called LAN Modem acts as the DNS server for workstations attached to the calling LAN Modem. An example of a LAN Modem Site-to-Site setup is shown in Figure 55.

192.168.1.2

192.168.1.3

192.168.1.4

192.168.1.5

The called LAN Modem
acts as DNS server to perform
workstation name-to-IP address
resolution for this call			192.168.2.2
192.168.1.1	192.168.1.1		192.168.2.3
	Public telephone
192.168.1.1	network	192.168.2.1
Site A		Site B	192.168.2.4
LAN Modem		LAN Modem

The called LAN Modem
issues its own IP address	192.168.2.5
as WAN IP address for this call.

Figure 55 LAN Modem Site-to-Site Dial-in Profile Type

Choose LAN Modem Site-to-Sitewhen your dial-in user will access a LAN Modem from another LAN Modem, where LAN resources are accessible on both ends of the connection.

Advanced Dial-inThe Advanced Dial-inprofile applies to a network scenario in which a router other than a LAN Modem will be dialing into the Dual 56K LAN Modem. Advanced Dial-in assumes that both the Dual 56K LAN Modem and the other router have been manually configured for static IP addressing, and each employs a unique range of addresses, as shown in Figure 56.

192.168.1.2			100.101.102.2
192.168.1.3			100.101.102.3
		Public telephone
	192.168.1.1	network
		100.101.102.1
192.168.1.4	OfficeConnect	Analog router	100.101.102.4
	Dual 56K LAN Modem	(other than LAN Modem)
192.168.1.5			100.101.102.5

Figure 56 Advanced Dial-in Profile Type

Choose Advanced Dial-inif your LAN is using static IP addressing, or your dial-in user will be accessing a LAN Modem from a router other than a LAN Modem. Note that the Advance Dial-in is the most complex dial-in scenario and may require the assistance of your MIS administrator. Refer to “Creating a Private Network Service Provider Profile”, which includes suggestions for configuring the Advanced dial-in parameters, for more information.

Once you have chosen a dial-in scenario that best fits your dial-in criteria, you are ready to configure the server-side LAN Modem for dial-in access. Refer to “Part I. Configuring the Server-side Dual 56K LAN Modem for Dial-in Support” or “Creating a Private Network Service Provider Profile” to manually create or further define dial-in users.