ELSA LANCOM Business 6000, Manual

Page: 156 / 174

Technical basics
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ELSA LANCOM Business 6000
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156
EN
If no DNS server is entered in the router, it will attempt to reach a DNS
server over a PPP connection (e.g. from the Internet provider) to get the IP
address assigned to the name from there. This can only succeed if the
address of a DNS server is sent to the router during PPP negotiation.
The default route is established and the DNS server searched for there if
no connection exists.
This procedure does not require you to have any knowledge of the DNS server
address. Entering the Intranet address of your router as the DNS server for
the workstation computers is sufficient to enable you obtain the name
assignment. This procedure also automatically updates the address of the
DNS server. Your local network always receives the most current information
even if, for example, the provider sending the address changes the name of
his DNS server or you change to another provider.
7.8 Policy-based routing
Policy-based routing describes a process in which particular data packets are
given preferential treatment. This requires evaluation of a special field within
the IP data packet, known as the Type of Service (TOS) field. This preferential
treatment of a number of data packets can, for example, simplify the
configuration of the router via the WAN when large data volumes are to be
transferred simultaneously.
You can find more information on policy based circuit routing in the
'Description of the menu options' in the Reference manual.