Eicon Networks DIVA LAN ISDN - Manual (Page 124)

Chapter Nine: Advanced Installations IP routes 124
Multiple connections
Consider the following scenario, which features an Internet and Corporate connection, each using one
B-channel (PPP):
This scenario requires three routes:
Route 3 is used to route traffic to the Corporate network (201.163.0.0). It is assigned to the Corporate
connection.
Notice that two subnetworks are directly connected to the Corporate network. Since one of these subnetworks
has the same network address (201.163), traffic addressed to users on this subnet will be properly routed.
Route 2 is required to send traffic to the second subnet (215.199.99.1). It is assigned to the Corporate
connection.
Route 1 is the default route. It is assigned to the Internet connection. It matches any address. Therefore, any
traffic that is not routed by Route 2 or 3 is routed by Route 1 to the Internet.
Network
ISDN
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
192.168.1.5 192.168.1.4 192.168.1.3 192.168.1.2
LAN
Routes
Route 1 = 0.0.0.0 with a mask of 0. Assigned to Internet connection.
Route 2 = 215.199.99.0 with a mask of 24. Assigned to Corporate connection.
Route 3 = 201.163.0.0 with a mask of 16. Assigned to Corporate connection.
Permanent address
Permanent address Permanent address
LAN
Corporate
Network
Corporate
DNS Server
and Gateway
B-channel
B-channel 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.