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e Series ADSL Brid
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e/ Router
7-35
Command Sets for Command Line Interface
more specific route), ff:ff:ff:0 would match a Class C network, and
ff:ff:ff:ff is a route to a single host. (Note: the default is not always
sensible; in particular, if “<dest>” is 0.0.0.0 then it would be better for
the mask to default to 0:0:0:0.)
“<cost>” (default 1) is the number of hops counted as the cost of the
route, which may affect the choice of route when the route is
competing with routes acquired from RIP. (But note that using a
mixture of RIP and static routing is not advised.)
“<timeout>” (default 0, meaning that the route does not time out) is
the number of seconds that the route will remain in the routing table.
Note that the routing table does not contain routes to the directly
connected networks, without going through a gateway. TCP/IP
routes packets to such destinations by using the information in the
device and subnet tables instead. The “route” command (with no
parameters) displays the routing table. It adds a comment to each
route with the following information:
• How the route was obtained; one of
MAN — configured by the “route” command
RIP — obtained from RIP
ICMP — obtained from an ICMP redirect message
SNMP — configured by SNMP network management;
• The time-out, if the route is not permanent;
• The original time-out, if the route is not permanent;
• The name of the interface (if known) that will be used for the
route;
• An asterisk (“*”) if the route was added recently and RIP has not
yet processed the change
(the asterisk should disappear within 30 seconds, when RIP next
considers broadcasting routing information).
Configuration saving saves this information. (Only the routes
configured by the “route” command are saved or displayed by
“config”.)
Example:
DSL> ip route add default 0.0.0.0 192.168.2.3 0:0:0:0
DSL> ip route add testnet1 192.168.101.0 192.168.2.34
DSL> ip route add testnet2 192.168.102.0 192.168.2.34 ff:ff:ff:0 1 60
DSL> ip route
route add testnet2 192.168.102.0 192.168.2.34 ff:ff:ff:00 1 # MAN 58s/1m via
ether *
route add testnet1 192.168.101.0 192.168.2.34 ff:ff:ff:00 1 # MAN via ether
route add default 0.0.0.0 192.168.2.3 00:00:00:00 1 # MAN via ether