Routing Articles

1). Cisco Routing: "ip default-network" vs. Default Static Routes By : Chris Bryant, CCIE #12933
One point of confusion for some CCNA and CCNP candidates is the difference between configuring a static default route and using the Cisco routing command ip default-network. At first glance, they appear to do the same thing. Both configure a destination to which packets should be routed if there is no more specific route in the routing table. The.
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2). Cisco CCNA Certification Exam Tutorial: Variance And Unequal Cost Load Balancing By : Chris Bryant, CCIE #12933
To pass the CCNA exam, you've got to know how to work with IGRP and EIGRP unequal-cost load balancing. You may not see much IGRP in production networks anymore, but you'll see a lot of EIGRP, and part of fine-tuning your EIGRP network is making sure that all paths are in use while allowing for varying bandwidth rates. Using the variance command is the easy part - it's getting the metric that's the hard part with IGRP.
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3). Cisco CCNP / BSCI Certification: The Local Preference BGP Attribute By : Chris Bryant, CCIE #12933
When studying for your BSCI exam for the CCNP, you get your first taste of BGP. One of the major differences between BGP and the other protocols you've studied to date is that BGP uses attributes to describe paths, and to influence the selection of one path over the other. In this free tutorial, we're going to take a look at the Local Preference attribute and compare it to the Cisco-proprietary BGP attribute "weight".
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4). Cisco CCNA Certification Exam Tutorial: Distance Vector Command Review By : Chris Bryant, CCIE #12933
Part of studying for CCNA exam success is keeping all these new commands straight in your head! And let's face it, there are a lot of commands you need to know in order to pass the CCNA exam and earn that certification. Here's a review of some very important distance vector and static routing commands you need to know, along with their proper usage and console output.
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5). Cisco CCNP / BSCI Exam Tutorial: EIGRP Stub Routing By : Chris Bryant
EIGRP stub routing is important for your BSCI exam success, and it can also cut down on unnecessary traffic in your production network. Learn the fundamentals from Chris Bryant, CCIE #12933.
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6). Cisco CCNP / BSCI Exam Tutorial: Filtering BGP Updates With Prefix Lists By : Chris Bryant, CCIE #12933
A major part of your BSCI and CCNP exam success is mastering BGP, and that includes filtering BGP routing updates. In this tutorial, we'll take a look at how to filter BGP updates with prefix lists. R4 is advertising three networks via BGP. The downstream router R3 sees these routes and places them into its BGP table as shown below. R3 has two downstream BGP peers, R1 and R2, and is advertising itself as the next-hop IP address for all BGP routes sent to those two routers.
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7). Cisco CCNP / BSCI Certification: Route Redistribution And The Seed Metric By : Chris Bryant, CCIE #12933
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.
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8). Cisco CCNP / BSCI Exam Tutorial: Introduction To Policy Routing By : Chris Bryant, CCIE #12933
Policy routing is a major topic on your BSCI exam, and you'll find quite a bit of policy routing going on in today's production networks. But what exactly is policy routing? Policy-based routing, generally referred to as "policy routing", is the use of route maps to determine the path a packet will take to get to its final destination. As you progress.
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9). CCNP Certification / BCMSN Exam Tutorial: Getting Started With HSRP By : Chris Bryant, CCIE #12933
Defined in RFC 2281, HSRP is a Cisco-proprietary protocol in which routers are put into an HSRP router group. Along with dynamic routing protocols and STP, HSRP is considered a high-availability network service, since all three have an almost immediate cutover to a secondary path when the primary path is unavailable. One of the routers will be selected.
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10). Cisco CCNA Exam Tutorial: Split Horizon And Hub-And-Spoke Networks By : Chris Bryant, CCIE #12933
For CCNA exam success, you had better know what split horizon is, how to turn it off, and when to turn it off. Knowing when to turn split horizon off is also important in production networks, because it can cause a hub-and-spoke network to have incomplete routing tables on the spokes. Split horizon exists for a very good reason - routing loop prevention.
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11). Cisco CCNP / BSCI Certification: Introduction To ISIS Terminology By : Chris Bryant, CCIE #12933
When you're studying to pass the BSCI exam and earn your CCNP certification, you're going to be introduced to ISIS. ISIS and OSPF are both link-state protocols, but ISIS works quite differently from OSPF. You must master these details in order to earn your CCNP. One of the major differences between OSPF and ISIS will be evident to you when you first begin your BSCI exam studies, and that is the terminology.
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12). Cisco CCNA / CCNP Home Lab Tutorial: Using 2520 Routers By : Chris Bryant, CCIE #12933
I know from experience that part of the excitement and anxiety of putting together your own CCNA / CCNP home lab is deciding what to buy! While you can make a workable home lab out of almost any combination of Cisco routers and switches, some routers are better suited for home lab work than others because they can fill multiple roles. My personal favorite is the Cisco 2520.
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13). Cisco CCNP / BSCI Exam Tutorial: Ten IP Routing Details You Must Know! By : Chris Bryant, CCIE #12933
To pass the BSCI exam and earn your CCNP, you've got to keep a lot of details in mind. It's easy to overlook the "simpler" protocols and services such as static routing and distance vector protocols. With this in mind, here's a quick review of some details you should know for success in the exam room and real-world networks! When packets need to be routed, the routing table is parsed for the longest prefix match if multiple paths exist with the same prefix length, the route with the lowest AD is preferred.
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14). Cisco CCNA Certification: Static Routing Tutorial By : Chris Bryant, CCIE #12933
In studying for your CCNA exam and preparing to earn this valuable certification, you may be tempted to spend little time studying static routing and head right for the more exciting dynamic routing protocols like RIP, EIGRP, and OSPF. This is an understandable mistake, but still a mistake. Static routing is not complicated, but it's an important topic on the CCNA exam and a valuable skill for real-world networking.
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