Routing and WAN connections
BAT54-Rail/F..
Release
7.54
06/08
11.2
IP routing
355
V Connection 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.
V Establishing 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.
V Transmission of data packets
As soon as the connection is established, the router can send the data
packet to the Internet.
11.2IP routing
An IP router works between networks which use TCP/IP as the network pro-
tocol. This only allows data transmissions to destination addresses entered
in the routing table. This section explains the structure of the IP routing table
of an Hirschmann router, as well as the additional functions available to sup-
port IP routing.
11.2.1 The IP routing table
The IP routing table is used to tell the router which remote station (which oth-
er router or computer) it should send the data for particular IP addresses or
IP address ranges to. This type of entry is also known as a “route“ since it is
used to describe the path of the data packet. This procedure is also called
“static routing” since you make these entries yourself and they remain un-
changed until you either change or delete them yourself. Naturally, “dynamic
routing” also exists. The routers use the routes in this way to exchange data
between themselves and continually update it automatically. The IP router
looks at the static and the dynamic routing table when the IP RIP is activated.
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