ELSA LANCOM Business 6000, Manual

Page: 130 / 174

Technical basics
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ELSA LANCOM Business 6000
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dropped and an alternative route sought if all the retries remain unanswered.
This may be found in the form of a backup line, for example.
During remote access of individual workstations with Windows 95, Windows
98 or Windows NT, we recommend switching off the regular LCP requests
since these operating systems do not reply to LCP echo requests.
The LCP request behavior is configured in the PPP list for each individual
connection. The intervals at which LCP requests should be made are set by
the entries in the 'Time' and 'Try' 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'.
7.3.4 Assigning IP addresses via PPP
In order to connect computers which use TCP/IP as network protocol, all
participants must have a valid and distinct IP address. If a remote station
does not have its custom IP address (e.g. the individual workstation of a
teleworker), then the
ELSA LANCOM Business can assign an IP address for
the duration of the connection, thus making communication possible.
This type of address assignment is carried out during PPP negotiation and
implemented only for connections via WAN. The assignment of addresses via
DHCP is used within a local network.
The assignment of an IP address is only possible when the ELSA LANCOM
Business can identify the remote station by an incoming call via the calling
number or the name, i.e., the authentication was successful.
For example: Remote access
The assignment of the address is possible by making a special entry in
the IP routing table. In addition to entering the IP address, which should
be assigned to the remote station from the 'Router name' field, the
255.255.255.255 is indicated as the network mask. In this case, the router
name is the name, with which the remote station must identify itself to
the
ELSA LANCOM Business .
In addition to the IP address, the addresses of the DNS and NBNS servers
(Domain Name Server and NetBIOS Name Server) including the backup