Lancom Systems LCOS 3.50

 Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.50

Routing and WAN

connections

A simplified example will clarify this process. Here we assume that the IP

address of the computer being searched for is known in the Internet.

햲Selecting the correct route

A data packet from a computer initially finds the path to the Internet

through the IP address of the receiver. The computer sends the packet

with this address over the LAN to the router. The router determines the

remote station in its IP routing table via which the target IP address can

be reached, e.g. 'Provider_A'.

햳Connection data for the remote station

Using these names, the router checks the names list and finds the neces-

sary connection data for provider A. Included in these connection data

are, for instance, the WAN interface (DSL, ISDN) through which the pro-

vider is connected to, protocol information, or the necessary number for

an ISDN call connection. The router also obtains the user name and pass-

word required for login from the PPP list.

햴Establishing the WAN connection

The router can then establish a connection to provider via a WAN inter-

face. It authenticates itself with a user name and password.

Provider

Internet user's PC

LANCOM

Data packet with

IP target address

DSL/ISDN/

ADSL Internet

IP routing tab. IP address Î remote station name

Name-list Remote station Îinterface, connection parame-

ters (ISDN: telephone number), communications

layer

PPP-list Terminal Î user name and password