Administrator Guide

Configuring Static Routes
A static route is an IP address that you manually configure and that the routing protocol does not learn, such as open shortest path first
(OSPF). Often, static routes are used as backup routes in case other dynamically learned routes are unreachable.
You can enter as many static IP addresses as necessary.
To configure a static route, use the following command.
• Configure a static IP address.
CONFIGURATION mode
ip route ip-address mask {ip-address | interface [ip-address]} [distance] [name description]
[permanent] [tag tag-value]
Use the following required and optional parameters:
• ip-address: enter an address in dotted decimal format (A.B.C.D).
• mask: enter a mask in slash prefix-length format (/X).
• interface: enter an interface type then the slot/port information.
• distance: the range is from 1 to 255. (optional)
• name: enter the keyword name and the description of the IPv4 static route configuration. (optional)
• permanent: keep the static route in the routing table (if you use the interface option) even if you disable the interface with
the route. (optional)
• tag tag-value: the range is from 1 to 4294967295. (optional)
To view the configured routes, use the show ip route static command.
Dell#show ip route static
Destination Gateway Dist/Metric Last Change
----------- ------- ----------- -----------
S 2.1.2.0/24 Direct, Nu 0 0/0 00:02:30
S 6.1.2.0/24 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.2/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.3/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.4/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.5/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.6/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.7/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.8/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.9/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.10/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.11/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.12/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.13/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.14/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.15/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.16/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 6.1.2.17/32 via 6.1.20.2, Te 5/0 1/0 00:02:30
S 11.1.1.0/24 Direct, Nu 0 0/0 00:02:30
Direct, Lo 0
--More--
The system installs a next hop that is on the directly connected subnet of current IP address on the interface (for example, if interface
gig 0/0 is on 172.31.5.0 subnet, the system installs the static route).
The system also installs a next hop that is not on the directly connected subnet but which recursively resolves to a next hop on the
interface's configured subnet. For example, if gig 0/0 has ip address on subnet 2.2.2.0 and if 172.31.5.43 recursively resolves to 2.2.2.0,
the system installs the static route.
• When the interface goes down, the system withdraws the route.
• When the interface comes up, the system re-installs the route.
• When the recursive resolution is “broken,” the system withdraws the route.
• When the recursive resolution is satisfied, the system re-installs the route.
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IPv4 Routing