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clicking on the
Routing
button at the bottom of the Advanced Internet Access
Setup screen (described in the previous section). From this screen, you can
also add new routing entries to the table. The following screen shows an
example of the IP Routing Table.
When an IP packet arrives in the SMC7301TA, IP tries to determine if the
destination IP address contained in the packet is within the network defined by
the “Dest IP” and “Netmask” pair of an entry in the routing tab le. If a match is
found, the packet is forwarded to the interface or profile specified in the
“IfName” field. The “Hops” field is the number of routers the packet must travel
through in order to reach its final destination. If this value is zero, the
destination is in a network directly attached to this router, such as a LAN.
If no match is found with a destination network, then a special entry
called the “Default IP Route” is used. This normally is set to a path where
another router can be reached that has additional information about other
networks not known to the Broadband Router, such as the interface to the
Internet. If no match is found and a default IP route is not defined, the IP
packet is discarded and will go nowhere.
An entry for a specif ic host or network may be added manually. This
“Static Route” is indicated by an “S” in the Flag’s field. Other flag field entries
are “H” for host, and “G” for gateway.
Note:
To delete a static route, select it in the routing table and click the
Delete
button. You cannot delete Host or Gateway routes.