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DI-1162 Remote Access Router
I.
In the case where the destination resides in the same IP
network on the LAN, the routing engine never acts on the
packet and it is sent directly to the destination through the
LAN.
II. In the case where the destination resides on a different IP
network on the LAN (which can happen when Multiple Home
Configuration is set up), the router will send out an ARP
request to obtain the MAC address of the destination
computer (or router) and deliver the packet. Note that defining
Static ARPs can speed up delivery since the router won't need
to send out an ARP request.
III. In the case where the router finds a match in the routing table
(which includes IP Static Routes), it uses the Gateway address
and Interface numbers to identify the correct Remote Network
Profile to use to dial out. From the Remote Network Profile,
the router gets the telephone number and other information
and dials out, establishes a connection and delivers the packet.
If you have a connection to the Internet, it is very important
that you define the default next hop router in the IP Static
Routes submenu of the console program as your ISP (see the
IP Static Routes section of this manual for more detailed
configuration information). This is because if a user on your
LAN makes a request to download a web page for the first
time, for instance, since it is the first time, the DI-206 will not
have any record of the web page's IP address in its routing
table. If no default next hop router is defined, the request will
be dropped and the user will get a 'Destination Unreachable'
error message. However, if a default next hop router is defined
in the IP Static Routes, the DI-206 will pass this request on to
the ISP (the request will go through) and the user will receive
the web page.
IV. In the case where there is no match for the destination IP
address in the routing table, and no default next hop router is
defined, the packet will be dropped and no action will be
taken.
50
Configuration and Management
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