Eicon Networks DIVA T/A ISDN Modem Guide de l'utilisateur télécharger pdf (Page 110)

Chapter Nine: Advanced Installations Concurrent Internet and Intranet connections

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The DIVA LAN ISDN Modem will automatically establish the link to the Internet and you will see the

following Dial-Up Networking dialog box, showing the details of your connection.

Note

The bps value reported by this dialog box is your LAN Ethernet speed. Your actual connection

speed will be either 64 bps or 128 kbps depending on how many B-channels you are using.

Note

The idle timer on the DIVA LAN ISDN Modem cannot be used to manage VPN connections. There-

fore, if your VPN connection remains idle for long periods of time, the link will not be disconnected unless

you manually disconnect.

Concurrent Internet and Intranet connections

The DIVA LAN ISDN Modem can support both an Internet connection and an intranet connection to your

corporate network. This section explains how to install and configure such a setup.

Selecting a connections protocol

One of the primary considerations is choice of connection protocol. If you want to have both connections active

at the same time, you must assign PPP to each connection. The reason for this is that any MLPPP-related

protocol reserves both ISDN channels for its exclusive use, even if they are not active. Therefore, the only way

to share the two ISDN channels between two data connections is to use PPP for each.

Defining routes

If you have two active connections, it is important to define routes so that the DIVA LAN ISDN Modem can

send data to the proper connection. In most cases, you will want to send certain specific traffic to your

corporate network, and route all other traffic to the Internet.

For a complete discussion of routing issues, see “IP routes” on page 111.

Installation and configuration procedure

Use the Internet wizard, as described in Chapter 2, to define your Internet connection.

The Internet wizard will automatically add a default route to the routing table. The default route is defined

as 0.0.0.0 with a mask of 0. This is a catch-all route. Any traffic which does not match any other route,

will match the default route, and thus be sent to the Internet.

Next, create a connection to your corporate network as described in Chapter Eight.

• Choose PPP as the connection protocol.

• When you reach the routing table, you should configure it as outlined in the section “Multiple

connections” on page 115.

You should now be able to use both connections.

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Eicon Networks DIVA T/A ISDN Modem Guide de l'utilisateur Page 110