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Configuring Protocol-Independent Features
Configuring Static Unicast Routes
Static unicast routes are user-defined routes that cause packets moving between a source and a
destination to take a specified path. Static routes can be important if the router cannot build a route to a
particular destination and are useful for specifying a gateway of last resort to which all unroutable
packets are sent.
Beginning in privileged EXEC mode, follow these steps to configure a static route:
Command
Step 1
configure terminal
Step 2
ip route prefix mask {address | interface} [distance]
Step 3
end
Step 4
show ip route
Step 5
copy running-config startup-config
Use the no ip route prefix mask {address | interface} global configuration command to remove a static
route.
The switch retains static routes until you remove them. However, you can override static routes with
dynamic routing information by assigning administrative distance values. Each dynamic routing
protocol has a default administrative distance, as listed in
overridden by information from a dynamic routing protocol, set the administrative distance of the static
route higher than that of the dynamic protocol.
Table 34-5
Route Source
Connected interface
Static route
Unknown
Static routes that point to an interface are advertised through RIP, whether or not static redistribute
router configuration commands were specified for those routing protocols. These static routes are
advertised because static routes that point to an interface are considered in the routing table to be
connected and hence lose their static nature. However, if you define a static route to an interface that is
not one of the networks defined in a network command, no dynamic routing protocols advertise the route
unless a redistribute static command is specified for these protocols.
When an interface goes down, all static routes through that interface are removed from the IP routing
table. When the software can no longer find a valid next hop for the address specified as the forwarding
router's address in a static route, the static route is also removed from the IP routing table.
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
34-30
Dynamic Routing Protocol Default Administrative Distances
Default Distance
0
1
225
Chapter 34
Purpose
Enter global configuration mode.
Establish a static route.
Return to privileged EXEC mode.
Display the current state of the routing table to verify
the configuration.
(Optional) Save your entries in the configuration file.
Table
34-5. If you want a static route to be
Configuring IP Unicast Routing
OL-8915-03
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