Cisco Router and Switch Connectivity: Selecting the Right Network Equipment

Many options are available when considering the purchase of a Cisco network device. Which device suits specific system resource and performance needs? It is imperative to perform the required research to learn about what each device has to offer when in need of dependable Cisco router and switch connectivity. One recommendation is to stay within a realm of familiar router and switch models. When a specific component is reliable and offers all that is needed, it does not make sense to choose a different product which could be difficult to configure, learn, and maintain. Business network professionals may also already know good products which have provided reliable connectivity in many locations. Sometimes the component being selected is for an entirely new purpose or network itself. In these scenarios, the most familiar component may not cut it. Use these criteria during the evaluation of new devices.

Start by comparing the number of packets that will be forwarded per second. This estimate is only available when conditions are optional. Each additional feature will reduce the number of forwarded packets. Having the ability to upgrade device functionality at a minimal cost is equally important. There are a default number of interfaces or switch ports per component. Make certain the selected switch or router has multiple interfaces as well as configurations for expansion. If the device needs to support a specific type of interface, make certain the capability is present. Other criteria to consider are the ability to support integrated services, easy manageability, redundancy, support, and reliability. All are equally important for a device to fully meet network requirements over an extended period of time. The selected product should be easy to connect, simple to configure with a current network setup, and upgradeable.

Cisco Switches: Seek Expert Advice to Match System Requirements

Research is a must to begin cutting out less desirable products from the number of available choices. Find a few options which can best meet business system requirements. Confusion may still be present after thoroughly researching Cisco switch and router connectivity choices. Cisco offers a high level of support and information for their devices. They have a product advisor to assist in the selection process. This tool is available to anyone without the need to set up an account. A product advisor along with documentation can ensure a well-informed decision is made when selecting these vital network components. The advisor provides assistance for switch, router, firewall, and wireless product selection. Determining individual network requirements along with a little research will make certain the resources provided by Cisco are beneficial. Other experts in the industry can also be a great tool when evaluating these components. Look online for individual product reviews created by actual users. Read consumer testimonials on certain products or component providers. These tools will help in finding a functional component which enhances a business system. Great connectivity, performance, and security are all obtained when the right device is chosen. Once a great component has been found, it must then be utilized to its full capabilities. Utilize all available tools to get the most out of a selected device.

Cisco router and switch connectivity must be dependable in order for a network to function consistently. User reviews and expert advice are a great source of information on Cisco switches.

Cisco CCNP / BSCI Certification: Introduction To ISIS Terminology

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. ISIS uses terms that no other protocol you've studied to date uses, and learning these new terms is the first step to BSCI and CCNP exam success.

First off, what does "IS" stand for in "ISIS"? It stands for "Intermediate System", which sounds like a group of routers. As opposed to Autonomous Systems, which are logical groups of routers, an Intermediate System is simply a single router. That's it.

You'll also become familiar with End Systems, referred to in ISIS as an "ES". The End System is simply an end host.

ISIS and OSPF both use the concept of areas, but ISIS takes a different approach to this concept. ISIS routers use three different types of routing levels, according to the area a router has been placed in. Level 2 routers are connected only to the backbone and serve as a transit device between non-backbone areas. Level 1 routers are totally internal to a non-backbone area.

ISIS uses both Level-1 and Level-2 Hellos, meaning that the two types of routers just mentioned cannot form an adjacency. Luckily for us, there is a middle ground, and that is the Level 1-2 router. These routers connect non-backbone areas to backbone areas. L1-L2 routers keep two separate routing tables, one for L1 routing and another for L2 routing. This is the default setting for a Cisco router, and L1-L2 routers can form adjacencies with both L1 and L2 routers.

Part of the challenge of learning ISIS is getting used to the differences between ISIS and OSPF. Keep studying the terminology, master one concept at a time, and soon you'll be a master of ISIS and a CCNP to boot!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of over 100 free certification exam tutorials, including Cisco CCNA certification test prep articles. His exclusive Cisco CCNA study guide and Cisco CCNA training is also available!

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