ELSA LANCOM Business LC-4X00, Руководство пользователя

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Operating modes and functions
ELSA LANCOM Business
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packet. This procedure is also called ”static routing“ since you make these entries
yourself and they remain unchanged until you either change or delete them yourself.
Naturally, there is ”dynamic routing“, too. The routers use the routes in this way to
exchange data between themselves and continually update it automatically. The static
routing table can hold up to 64 entries, the dynamic table can hold 128. The IP router
looks at both tables when the IP RIP is activated.
You also use the IP routing table to tell the router the length of this route's path so that
it can select the most suitable route in conjunction with IP RIP where there are several
routes to the same destination. The default setting for the distance to another router is
2, i.e. the router can be reached directly. All devices which can be reached locally, such
as other routers in the same LAN or workstation computers connected via Proxy ARP are
entered with the distance 0. The ”quality level“ of this route will be reduced if the entry
addressed has a higher distance (up to 14). ”Unfavorable“ routes like this will only be
used if no other route to the remote station in question can be found.
The routing table can be found in the ELSA LANconfig in the 'TCP/IP' configuration
section on the 'Routing' tab, or in the
/Setup/IP-router-module/IP-
routing-table
menu. This, then, is how an IP routing table might look:
What do the various entries on the list mean?
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IP addresses and Network
This is the address of the destination network to which data packets may be sent
and its associated network mask. The router uses the network mask and the
destination IP address of the incoming data packets to check whether the packet
belongs to the destination network in question.
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Router
The router transmits the appropriate data packets to the IP address and network
mask to this remote station. A name is entered at this point if the remote station is
a router in another network or an individual workstation computer. This is where
the IP address of another router which knows the path to the destination network is
entered if the router on the network cannot address the remote station itself.
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Distance
Number of routers between your own and the destination router. This value is often
equated with the cost of the transmission and used to distinguish between
inexpensive and expensive call paths for wide-area connections. The distance
IP address Netmask Router Dis-
tance Mask.
192.168.120.0 255.255.255.0 GLASGOW 2 On
192.168.125.0 255.255.255.0 LONDON 3 Off
192.168.130.0 255.255.255.0 191.168.140.123 0 Static