miercuri, 2 octombrie 2013

Cisco CCNP BSCI Certification Route Redistribution And The Seed Metric

In the first part of this free CCNP / BSCI tutorial, we looked at how leaving one simple word out of our route redistribution configuration - "subnets" - resulted in an incomplete routing table when redistributing routes from RIP to OSPF. (If you missed that part of the tutorial, visit my website's "Free Tutorials" section.) Today, we'll look at redistributing OSPF routes into RIP and identify another common redistribution error.

We are using a three-router network. R5 is running RIP, R1 is serving as a hub between R5 and R3 and is running RIP and OSPF, and R3 is running OSPF.

To begin this lab, we'll add three loopbacks to R3 and advertise them to R1 via OSPF.

R3(config)#int loopback33

R3(config-if)#ip address 33.3.3.3 255.255.255.255

R3(config-if)#int loopback34

R3(config-if)#ip address 34.3.3.3 255.255.255.255

R3(config-if)#int loopback35

R3(config-if)#ip address 35.3.3.3 255.255.255.255

R3(config-if)#router ospf 1

R3(config-router)#network 33.3.3.3 0.0.0.0 area 1

R3(config-router)#network 34.3.3.3 0.0.0.0 area 1

R3(config-router)#network 35.3.3.3 0.0.0.0 area 1

R1 sees all three of these routes in its routing table.

R1#show ip route ospf

34.0.0.0/32 is subnetted, 1 subnets

O IA 34.3.3.3 [110/65] via 172.12.123.3, 00:00:55, Serial0

35.0.0.0/32 is subnetted, 1 subnets

O IA 35.3.3.3 [110/65] via 172.12.123.3, 00:00:45, Serial0

33.0.0.0/32 is subnetted, 1 subnets

O IA 33.3.3.3 [110/65] via 172.12.123.3, 00:00:55, Serial0

We'll now redistribute these routes into RIP on R1. Remember the "subnets" option we talked about in the first part of this tutorial? There is no such option when redistributing OSPF routes into RIP, as IOS Help shows us.

R1(config)#router rip

R1(config-router)#redistribute ospf 1 ?

match Redistribution of OSPF routes

metric Metric for redistributed routes

route-map Route map reference

vrf VPN Routing/Forwarding Instance

R1(config-router)#redistribute ospf 1

The routes have been redistributed into RIP with the redistribute ospf 1 command. (The "1" is the OSPF process number.) Let's look at R5 and see the results.

R5#show ip route rip

R5#

The routes aren't there, but we didn't get a warning from the router that we needed to do anything else. What is the problem?

The problem is that RIP requires a seed metric to be specified when redistributing routes into that protocol. A seed metric is a "starter metric" that gives the RIP process a metric it can work with. The OSPF metric of cost is incomprehensible to RIP, since RIP's sole metric is hop count. We've got to give RIP a metric it understands when redistributing routes into that protocol, so let's go back to R1 and do so.

R1(config)#router rip

R1(config-router)#no redistribute ospf 1

R1(config-router)#redistribute ospf 1 metric 2

R5 now sees the routes. Note that the metric contained in the brackets is the seed metric.

R5#show ip route rip

34.0.0.0/32 is subnetted, 1 subnets

R 34.3.3.3 [120/2] via 100.1.1.1, 00:00:24, Ethernet0

35.0.0.0/32 is subnetted, 1 subnets

R 35.3.3.3 [120/2] via 100.1.1.1, 00:00:24, Ethernet0

33.0.0.0/32 is subnetted, 1 subnets

R 33.3.3.3 [120/2] via 100.1.1.1, 00:00:24, Ethernet0

If you read the previous tutorial, you may have noticed that we did not specify a seed metric for OSPF. OSPF does not require a seed metric to be set during redistribution. You also noticed that the router did tell us that there might be a problem when we left the "subnets" option out of RIP>OSPF redistribution, but the router didn't tell us anything about a seed metric when we performed OSPF>RIP redistribution. This is a detail you must know by heart in order to make your route redistribution successful!



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marți, 1 octombrie 2013

Certkey 650-177 Practice Exam

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What Gift Is The Best For This Christmas - Links Of London Bracelets

The bracelets are meant to underline the beauty of the hand. They have been used since ancient times. Most women seem to wear jewelry with some relief. Bracelets are no exception. A type of bracelet from well known and highly regarded today is the Links Of London Bracelets. In addition to the line, the bracelet is adorned with various trinkets or beads. Somehow, these bracelets have combined the beauty of our interest in symbols. No matter whether they admit it or not, we all have an object of luck. With charm bracelets that we can use without letting others know about our little secret.

On the other hand, there are charm bracelets and pendants contain some luck. Think bracelets with ladybugs or horseshoes. They are meant to edge luck to the owner.

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Achieving Goals On The Treadmill

There are many things to be mindful of when exercising, so that the process involved is both a pleasant one and a profitable one. If proper planning and forethought are not observed before beginning an exercise regimen, it is possible to become disheartened and frustrated with the process before it has a chance to fully take effect in a person's life.

In the case of using a treadmill, it is important to consider how capable a person is when they are as they are beginning, how much time they are able to invest over time, and how hard they are willing to work. This allows for realistic planning to begin, as people can objectively weigh their capabilities and commit to a schedule of workout times.

Before getting officially started, the user should try to establish a baseline for their abilities by doing a moderately straining run on the treadmill. Record results and the level of difficulty, as well as the time when the user began to grow tired.

Now that a baseline has been taken, the issue of time commitment should be discussed. Whoever is working out needs to set aside time a few times a week to regularly use the treadmill.

It is only by building a pattern that the equipment can be effective, because the repetition builds habit, which will be the deciding factor in the overall outcome of the pursuit. If a person incorporates the workout into their daily or weekly routine, then it does not seem like a sacrifice to do so.

Deciding on a time invested lies with the user, but it is critical that the routine be repeated, preferably every day during the same time. However, this is not always possible, so prioritizing a set amount of time per week will suffice.

Now that the effective time frame has been decided, the issue of difficulty should be discussed. For some, beginning on a very difficult setting and advancing from there will serve as an effective challenge guaranteed to be strenuous and exhausting. This will leader to fairly quick results if it is observed and can be maintained.

However, for new treadmill users, it may be comfortable to start on an easy setting after establishing the baseline and incrementally work their way up. Doing this will allow for slow, steady growth over time, which is an equally viable alternative if the user can commit to a longer regimen of fitness.

Lastly, the user needs to decide on their ultimate goal. This is a long term goal that is constantly being worked toward, and represents the end of the journey and the ultimate metaphorical payout after.

For some, this goal may be weight loss. This is an easily measured objective that can be effectively tracked over time and weighed as a ratio of time invested over weight loss.

Being able to feel and see a physical change can be great incentive when using a treadmill to reach this goal. This objective is both a compelling and achievable one, and is quite common to see among new users or those returning to a fitness program after an absence.

Other people may be striving for a certain time or intensity setting on the treadmill. For those wanting to reach this goal, it will be an involved grind requiring patience as endurance and capabilities build as the sessions go on.

This objective is easily doable, and is more predictable than weight loss, which fluctuates and burns according to person instead of measurable increments. Those who adjust a certain amount a session can hit these objectives in an almost guaranteed way, because it simply requires a commitment to the increase.

Still others may opt to use the treadmill to hit a certain heart rate or blood pressure. Much like losing weight, this process may be a little more unpredictable than hitting an exact time or difficulty, because every person differs in their requirements and what their body will do in response to the exercise.

Setting realistic, achievable goals that encourage progress and tenacity are important when using a treadmill. If a person can see tangible evidence of progress, they are much more likely to return to and pursue the activity further, until they reach their ultimate goal.

access point vs router

Wi-fi Radio "?" Next Big Thing

Wi-fi radio has evolved thanks to the wonderful amalgamation of broadband, wireless and radio technologies. The technology is set to progress to extraordinary proportions.

Fire up your home and backyard with Wi-fi Internet Radio which is as exciting an innovation as radio itself. The medium which provides enormous variety and niche programming, allows virtually anyone to listen to programs at any place from anywhere in the world. It even allows anyone to start up and run their own online radio station and reach across the world. Have you seen anyone so empowered with a single invention?

Wi-fi Internet Radio is another step of radio after its transformation into Internet Radio. The product has evolved, thanks to the wonderful amalgamation of broadband, wireless and radio technologies. The hand-held device can easily be taken even out of home. The key for users is the given ability to walk away from their personal computer or household and still access their favorite radio stations. The technology has arrived.

An interesting question is whether portable Internet Radio will make satellite radio obsolete. There are enough net streams available to satisfy anyones taste. Enjoying internet radio at your home is relatively cheap but once you make some of these streams available to portable devices, there will be some costs involved. Internet Radio can easily be distributed via satellite or the current wireless cell phone infrastructure. However, as satellite time can be cost prohibitive, it means only a limited amount of streams would be available. The cost would inevitably be passed along to the consumer. As for receiving the internet radio on your cell phone, cost as well as bandwidth considerations have to be considered.

Future cell phones will predictably have the ability to pick up hundreds of audio and video channels, from both satellite feeds and the Internet. The cell phone will act just like a wireless radio, making it a common source of entertainment for the masses. As we all know, the consumer today is constantly putting more and more demands on product providers. Cell phones of tomorrow are going to be as powerful as today's portable satellite receivers when it comes to providing us with entertainment options. Internet radio has even entered the cars and trains forcing the terrestrial radio stations to reprogram themselves.

A wi-fi internet radio device is almost a mini computer in itself. It connects to your existing wireless network similar to a laptop computer. Once it has connected, you can use this regular looking radio to access the tens of thousands of stations from anywhere within range. You could take this radio anywhere you want and it would deliver. The product allows you to utilize audio delights such as podcasts and listen again services. You can listen to your favorite show at a time which suits you. You can enjoy a tremendous variety of music, news, sport news and chat shows. If you know several languages, you can get a wide range of international language radio stations like French, Spanish, Portuguese and Chinese as well.

The technology is set to progress to extraordinary proportions. Advances in other areas of technology would benefit internet streaming in a huge way. As wi-fi becomes prevalent in more and more areas, internet radio streams will become easily accessible. To put it in short, only sky is the limit for the Internet technology.

Internet radio offers you a plethora of options which is just overwhelming. If puts forth for you an unlimited storehouse of entertainment.

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