Cisco Network Time Protocol Configuration

As discussed in the previous Network Time Protocol (NTP) concepts article, the configuration of NTP is not overly complex. The first thing that needs to be determined is the method of NTP operation that best fits the requirements for the target network; once this decision has been made, the steps shown in this article can be […]

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Understanding Cisco Network Time Protocol Concepts

One of the new topics that has (up to this point) not been covered on Cisco’s CCNA level exams has been the Network Time Protocol (NTP). Time synchronization is used within a network for two main purposes: to maintain very high accuracy synchronization between Time Division Multiplexing (TDM) nodes and to maintain clock time between […]

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Cisco Gateway Load Balance Protocol (GLBP) Configuration

The configuration of a basic Virtual Router Redundancy Protocol (VRRP) implementation is not all that complex, and resembles a lot the configuration of Cisco’s Hot Standby Router Protocol (HSRP) if the reader is more familiar with that protocol. This section first covers the configuration process steps and commands that are used to perform a basic […]

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Cisco Virtual Router Redundancy Protocol (VRRP) Configuration

The configuration of a basic Virtual Router Redundancy Protocol (VRRP) implementation is not all that complex, and resembles a lot the configuration of Cisco’s Hot Standby Router Protocol (HSRP) if the reader is more familiar with that protocol. This section first covers the configuration process steps and commands that are used to perform a basic […]

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Hot Standby Router Protocol (HSRP) Configuration

Once you’ve had the ability to read the first article in this series or if you have previous knowledge of Cisco’s Hot Standby Redundancy Protocol (HSRP), you should then read this article. This article takes the concepts that were covered in the initial article and offers a little more information about how the HSRP devices […]

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Cisco IOS Image Security

This article discusses Cisco IOS image types and provides methods to ensure that the images are complete and have not been modified. It also briefly covers digital signatures that are possible with newer Cisco hardware. Overview The previous article talked about the different Cisco IOS image types, the image file-naming structure, and the different ways […]

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Cisco IOS Image Concepts and Configuration

Cisco network engineers should know how to correctly perform a router image update/upgrade. This article covers the different image types that exist on most Cisco equipment, Cisco’s image-naming structure, and how to perform image updates/upgrades. Overview An important skill for Cisco network engineers to have is the ability to correctly perform an image update/upgrade. Although […]

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