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April 30, 2009

Cisco CCNP Certification / BSCI Exam Tutorial: Floating Static Routes

Filed under: Techies World — admin @ 1:51 am

Passing the BSCI exam and earning your CCNP certification demands that you add greatly to the networking skills foundation you created when you studied for your CCNA certification. You learned quite a bit about static routing and default static routing when you passed the CCNA test, and it does seem like that should be all you need to know about static routing, right?

One thing you’ll learn as you continue to earn Cisco certifications is that there’s always something else to learn! You may have heard the term “floating static route”, which does suggest some interesting mental pictures. “Floating”? Floating on what?

In a way, a floating static route is “floating” in your routing table. A floating static route is a route that will be used only if routes for the same destination but with a lower administrative distance are removed from the table. For example, you could be using an OSPF-discovered route as your primary route to a given destination, and the floating static route would serve as a backup route that would be used only if the OSPF route leaves the routing table.

Now, how can that happen? After all, OSPF has an administrative distance of 110 and static routes have ADs of one or zero, depending on whether it’s configured with a next-hop IP address or a local exit interface. One way or the other, 1 and 0 are still less than 110!

When you want to configure a floating static route, you must assign the route an AD higher than that of the primary route. In this case, we’ve got to create a static route with an AD higher than 110. We do this by using the “distance” option at the end of the “ip route” command.

R1(config)#ip route 110.1.1.0 255.255.255.0 172.12.123.1 ?

<1-255> Distance metric for this route

name Specify name of the next hop

permanent permanent route

tag Set tag for this route

R1(config)#ip route 110.1.1.0 255.255.255.0 172.12.123.1 111

The number entered at the very end of the “ip route” command is the AD of that route. If there is an OSPF route for 110.1.1.0 /24, that will be the primary route, and the floating static route will not be used unless the OSPF route is taken out of the routing table.

Floating static routes aren’t just a good thing to know for the BSCI exam and your CCNP certification pursuit – they’re very practical in the real world as well.

Chris Bryant - EzineArticles Expert Author

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.
For a FREE copy of his latest e-books, “How To Pass The CCNA” and “How To Pass The CCNP”, just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Pass the
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Make All of Your Families Cold Frosty Blues Go by Taking in a Brilliant London Westend Musical

Filed under: Regional Sources — admin @ 1:18 am

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Besides ringing the theatre ticketing services, you can get London theatre tickets from the Leicester Square Box Office (more commonly known as LSBO) which is situated in Leicester Square, as well as from the ticket agents. The Leicester Square box offices are usually open from 10 o’clock in the morning. They close about 30 mins after the opening of the evening show. If you opt for the ticket stall at Leicester Square, you can get money off on musicals for the current day’s performance. The stand is open from ten o’clock in the morning to seven in the evening through the weekdays & weekend. Nevertheless, on Sundays, it’s open from 12 o’clock to three o’clock in the day. This is the only endorsed cubicle in London. It is operated by the Society of London Theatre. Although you probably will not acquire theatre tickets for each & every show, you can of course get tickets for the popular hits. You can even browse the helpful LSBO website for more theatre information.