Eicon Networks DIVA LAN ISDN - Manual (Page 125)

Chapter Nine: Advanced Installations IP routes 125
Routing on the local LAN
The DIVA LAN ISDN Modem lets you create your own local area network. In some instances, this network, or
the DIVA LAN ISDN Modem itself, will be connected to another network via a bridge or router. Consider this
scenario, which adds another LAN to the previously discussed example:
Assuming that RIP (discussed in the next section), is not being used on the LAN, this scenario requires an
additional route.
Route 4 is used to route traffic to the new LAN connected to the computer with address 192.168.1.5 This route
is assigned to the LAN interface, which means that instead of traffic being sent onto the ISDN link, it is
forwarded onto the LAN. The LAN address of the destination is required, because unlike the ISDN link, where
only one device exists at the other end of the connection, more than one device is connected to the LAN. So,
the gateway address for this route is 192.168.1.5, which is the computer that provides access to the destination
LAN. Of course, this computer must be properly configured to forward the datagrams it receives onto the other
LAN.
B-channel
B-channel
DIVA LAN ISDN Modem
Internet
ISP
FAULT POWER
DIVA LAN ISDN Modem
ISDN E4/C E1 E2 E3 LINK Ethernet B1 B2 D
201.163.1.1
201.163.10.1 215.199.99.1
192.168.1.1
192.168.1.5
150.150.5.1
192.168.1.4
150.150.5.2
192.168.1.3
150.150.5.3
192.168.1.2
150.150.5.4
LAN
Routes
Route 1 = 0.0.0.0 with a mask of 0. Assigned to Internet connection.
Route 3 = 201.163.0.0 with a mask of 16. Assigned to Corporate connection.
Route 4 = 150.150.0.0 with a mask of 16. Assigned to the LAN interface. Gateway address is 192.168.1.5
Route 2 = 215.199.99.0 with a mask of 24. Assigned to Corporate connection.
201.163.1.157
212.182.22.39
Address negotiated with ISP
ISP profile
Corporate profile
Address negotiated with corporate
network or could be permanently
assigned by the corporate
administrator.
Permanent address
Permanent address Permanent address
LAN
Corporate
Network
Corporate
DNS Server
and Gateway
Network
ISDN