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Static Routes: By: Matthew Mccormick

Static routes are manually configured routing entries in a router's routing table that specify the next hop for a destination network. They are useful for small, static networks and stub networks. While they are easy to implement and secure, static routes do not change when network topology changes and require manual intervention to reroute traffic if a link fails. Larger, dynamic networks are better suited to routing protocols like RIP, RIP2, and OSPF that can automatically adapt to changes.

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41 views11 pages

Static Routes: By: Matthew Mccormick

Static routes are manually configured routing entries in a router's routing table that specify the next hop for a destination network. They are useful for small, static networks and stub networks. While they are easy to implement and secure, static routes do not change when network topology changes and require manual intervention to reroute traffic if a link fails. Larger, dynamic networks are better suited to routing protocols like RIP, RIP2, and OSPF that can automatically adapt to changes.

Uploaded by

MatthewMcCormick
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PPTX, PDF, TXT or read online on Scribd
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Static Routes

By: Matthew McCormick

What are Static Routes?

Form of routing that is manual

Router uses a manual configured routing entry

Usually done by system admin by adding entries into a routing


table

Static routes are fixed, and do not change when network


reconfigured

Why should we use Static Routes?

Providing ease of routing table maintenance in smaller networks that are not
expected to grow significantly.

Routing to and from a stub network, which is a network with only one default
route out and no knowledge of any remote networks.

Accessing a single default route (which is used to represent a path to any


network that does not have a more specific match with another route in the
routing table).

Advantages to Static Routes

Bandwidth usage between router is at a minimum, none in some cases.

There

is no overhead on the router CPU.

It adds security due to choice of route configuration by the administrator.

Easy

to implement in a small network.

Very

secure. No advertisements are sent, unlike with dynamic routing protocols.

It

is very predictable, as the route to the destination is always the same.

Disadvantages of Static Routes

Configuration complexity increases dramatically as the network grows.


Managing the static configurations in large networks can become time
consuming.

If a link fails, a static route cannot reroute traffic. Therefore, manual


intervention is required to re-route traffic.

Too complex and can sometime be confusing during troubleshooting

Other protocols will work much better such as RIP, RIP 2, or OSPF

Sample Routing Scenario

Another Example

How to configure a Static Route

Router> enable

Router# configure terminal

Router(config)# ip route 10.10.20.0 255.255.255.0 192.168.100.1

Multiple static routes per destination:


Router> enable
Router# configure t
Router(config)# ip route 197.164.73.0 255.255.255.0 197.164.72.2
Router(config)# ip route 197.164.74.0 255.255.255.0 197.164.72.2

How to configure a Static


Route( continued).

The administrative distance can be manually (re)configured so that the static


route can be configured as a backup route, to be used only if the dynamic
route is unavailable.[8]

Router(config)# ip route 10.10.20.0 255.255.255.0 exampleRoute 1 254

Setting the administrative distance to 254 will result in the route being used
only as a backup.

How to trouble
Common IOS troubleshooting commands include:

ping

traceroute

show ip route

show ip interface brief

show cdp neighbors detail

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