CCNA Certification Training: Configuring Static Routes On A Cisco Router

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CCNA Certification Training: Configuring Static Routes On A Cisco Router By Expert Author: Chris Bryant
View Summary \| Submitted: 2006-11-29 \| Word Count: 431 words \| Views: 108 view(s)

The great thing about CCNA certification training is that the skills you learn will truly come in handy when working with Cisco routers and switches in production networks. That's particularly true of static route configuration. While most networks use dynamic routing protocols such as RIP, EIGRP, and OSPF to build routing tables, static routes still come in handy sometimes - especially if a routing protocol configuration goes awry.

Let's say that you just added a new segment to your network and you've successfully added it to your network's routing tables. Suddenly, on Monday morning, users on that segment can't get to a network resource such as an email server, or they can't get out to the Internet. We all know what it's like to try to fix something while the phone's ringing like crazy. That's when we have to do two things.

First, resist the temptation to say "I would fix it, but I'm too busy talking to you".

Second, use a quick fix to get the issue resolved temporarily while you resolve the issue.

Static routes are a great quick fix. You can use a static route to get the users where they need to be, which gives you time to find out what the problem is with the dynamic routing protocol. (You must also resist the temptation to apply a static route and declare the problem fixed!)

Static routes are configured with the ip route command, followed by the destination network and mask. After that, you must specify either the next-hop IP address or the local exit interface. Both of the following masks are acceptable:

ip route 172.10.1.0 255.255.255.0 210.1.1.1

ip route 172.10.1.0 255.255.255.0 serial0

Using IOS Help on a Cisco router shows the various options:

R1(config)#ip route ?

A.B.C.D Destination prefix

profile Enable IP routing table profile

vrf Configure static route for a VPN Routing/Forwarding instance

R1(config)#ip route 172.10.1.0 ?

A.B.C.D Destination prefix mask

R1(config)#ip route 172.10.1.0 255.255.255.0 ?

A.B.C.D Forwarding router's address

BRI ISDN Basic Rate Interface

Dialer Dialer interface

Loopback Loopback interface

Null Null interface

Serial Serial

TokenRing IEEE 802.5

Remember, you're specifying either the next-hop router's IP address or the local router's exit interface!

Configuring static routes is a great skill to have in the network room and in the CCNA exam room. Be ready to configure them in either situation!

About the Author/Author Bio

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of over 200 free certification exam tutorials, including CCNA certification training articles. His exclusive CCNA study guide is also available!

Visit his blog and sign up for Cisco Certification Central, a daily newsletter packed with CCNA, Network+, Security+, A+, and CCNP certification exam practice questions! A free 7-part course, "How To Pass The CCNA", is also available, and you can attend an in-person or online Cisco CCNA training boot camp with The Bryant Advantage!

Article Source: http://www.articlesphere.com/Article/CCNA-Certification-Training---Configuring-Static-Routes-On-A-Cisco-Router/61012

Article Tags: computer and technology, certification test exam, ccna, certification, training, static, route, default, cisco, router, mask, interface, protocol

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