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̈ Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.50
83
Routing and WAN
connections
Remote monitoring and remote control of networks
Remote maintenance and control of networks become more and more impor-
tance because of the possibilities given by VPN. With the use of the nearly
ubiquitous broadband Internet connections, the administrator of such man-
agement scenarios is no longer dependent of the different data communica-
tion technologies or expensive leased lines.
In this example, a service provider monitors the networks of different clients
out of a central control. For this purpose, the SNMP-capable devices should
send the respective traps of important events automatically to the SNMP trap
addressee (e. g. LANmonitor) of the network of the service provider. So the
LAN administrator of the service provider has an up-to-date view of the state
of the devices at any time.
The individual networks can be structured very differently: Clients A and B
integrate their branches with own networks via VPN connections to their LAN,
Gateway
VPN
tun
n
e
l
Internet
GatewayGateway
Customer C:
172.16.10.x, 255.255.255.0
Customer A, office 1:
10.1.2.x, 255.255.255.0
Customer A, office 2:
10.1.3.x, 255.255.255.0
VPN tunnel
Customer A, headquarters:
10.1.x.x, 255.255.0.0
Customer B, office 1:
10.1.2.x, 255.255.255.0
Customer B, office 2:
10.1.3.x, 255.255.255.0
Customer B, headquarters:
10.1.x.x, 255.255.0.0
Customer D:
172.16.10.x,
255.255.255.0
Service provider:
172.16.10.x,
255.255.255.0
Hot Spot, e.g.
172.16.10.11
Gateway, e.g.
80.123.123.123 (public)
and 172.16.10.11 (intern)
Gateway, e.g.
10.1.2.1