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6.1 | |
Introduction to Static Routing | |
| 6.1.2 | |
Static route operation |
Static route operations can be divided
into these three parts:
Since a static route is manually
configured, the administrator must configure the static route on the
router using the ip route
command. The correct syntax for the
ip route
command is shown in Figure
In Figures
The administrative distance is an optional parameter that gives a measure of the reliability of the route. A lower value for the administrative distance indicates the more reliable route. Thus, a route with a lower administrative distance will be installed before an identical route with a higher administrative distance. The default administrative distance when using next-hop address is 1, while the default administrative distance when using the outgoing interface is 0. If an administrative distance other than the default is desired, a value between 0 and 255 is entered after the next-hop or outgoing interface as follows:
If the router cannot reach the outgoing interface that is being used in the route, the route will not be installed in the routing table. This means if that interface is down, the route will not be placed in the routing table. Sometimes static routes are used for backup purposes. A static route can be configured on a router that will only be used when the dynamically learned route has failed. To use a static route in this manner, simply set the administrative distance higher than that of the dynamic routing protocol being used.
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and
, the
network administrator of the Hoboken router needs to configure a
static route pointing to the 172.16.1.0/24 and 172.16.5.0/24 networks
on the other routers. The administrator could enter either of two commands to
accomplish this objective. The method in Figure
