Routing and WAN connections
BAT54-Rail/F..
Release
7.54
06/08
11.10
Establishing connection with PPP
437
Note: The LCP request behavior is configured in the PPP list for each indi-
vidual connection. The intervals at which LCP requests should be made
are set by the entries in the 'Time' and 'Retr.' fields, along with the number
of retries that should be initiated without a response before the line can be
considered faulty. LCP requests can be switched off entirely by setting the
time at '0' and the retries at '0'.
11.10.3Assignment of IP addresses via PPP
In order to connect computers using TCP/IP as the network protocol, all par-
ticipating computers require a valid and unique IP address. If a remote station
does not have its own IP address (such as the individual workstation of a
telecomputer), the BAT assigns it an IP address for the duration of the con-
nection, enabling communications to take place.
This type of address assignment is carried out during PPP negotiation and
implemented only for connections via WAN. In contrast, the assignment of
addresses via DHCP is (normally) used within a local network.
Note: Assignment of an IP address will only be possible if the BAT can iden-
tify the remote station by its call number or name when the call arrives, i.e.
the authentication process has been successful.
U Examples
D Remote access
Address assignment is made possible by a special entry in the IP routing
table. 255.255.255.255 is specified as the network mask as the IP
address to be assigned to the remote site in the 'Router-name' field. In
this case, the router name is the name, with which the remote site must
identify itself to the BAT.
In addition to the IP address, the addresses of the DNS and NBNS serv-
ers (Domain Name Server and NetBIOS Name Server) including the
backup server from the entries in the TCP/IP module are transmitted to
the remote station during this configuration.
So that everything functions properly, the remote site must also be
adjusted in such a way that it can obtain the IP address and the name
server from the BAT. This can be accomplished with Windows dial-up
networking through the settings in the 'TCP settings' under 'IP address'
and 'DNS configuration'. This is where the options 'IP address assigned
by server' and 'Specify name server addresses' are activated.
D Internet access
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