Networking

Articles about networking technologies and leading companies such as Cisco, Huawei, Microsoft…

policing algorithms in QoS https://tutorzine.com
Networking

policing algorithms in QoS

There are different variations of policing algorithms, including the following: Single-rate two-color Single-rate three-color Dual-rate three-color This article analyzes each of the above algorithms in detail. If you are not familiar with the concept of QoS policy read “QoS Policing and Shaping” article. Single-Rate Two-Color Policers The original policers implemented use a single-rate, two-color model […]

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QOS Policing and Shaping https://tutorzine.com
Networking

QoS Policing and Shaping

This article covers the following topics related to QoS Policing and Shaping: Terminology, recommendations, and differences (related to policing, shaping, and markdown tools) Policing tools and mechanisms Shaping tools and the related functionalities An important early step in implementing a Quality of Service (QoS) policy is to analyze and identify the traffic to be treated by […]

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QoS Classification and Marking https://tutorzine.com
Networking

QoS Classification and Marking

The first step in implementing a quality of service (QoS) policy is to analyze and identify the traffic that is to be treated by some set of actions. Once determined, the packets belonging to the traffic class are usually marked by writing a value into a header field so that the traffic classification analysis happens […]

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QoS tools https://tutorzine.com
Networking

QoS Tools and Packet Headers

A fair amount of literature exists on QoS concepts, technologies, and features. Therefore, the purpose of this article is not to reiterate in depth how each of these tools work, but to provide a quick overview of the key tools available and to show how these tools interact with each other. This section will walk […]

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QOS introduction https://tutorzine.com
Networking

An introduction to QOS

This article provides a brief history of rich media and cloud network evolution, illustrating the background of the concepts of quality of service (QoS). It introduces the fundamental QoS concepts, standards, and the recent networking changes in this area. The article specifically covers the following topics: Evolution of traffic types and classes Integrated services (IntServ) […]

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IS-IS network types https://tutorzine.com
Networking

IS-IS Operation over Different Network Types

Contrary to OSPF, which recognizes several network types, IS-IS natively supports only broadcast and point-to-point network types. Running IS-IS over Ethernet networks, as well as over HDLC, PPP, GRE tunnels, and point-to-point Frame Relay or ATM subinterfaces, works right out of the box. However, IS-IS has no special provisions to correctly operate over partially meshed data link layer technologies […]

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IS-IS Packet types https://tutorzine.com
Networking

IS-IS Packet Types

IS-IS defines four basic types of packets: Hello packet Link State PDU Complete Sequence Numbers PDU Partial Sequence Numbers PDU To ease the understanding, we will often be comparing IS-IS packet types to OSPF packet types, drawing on their similarities and differences, assuming that the reader is already well acquainted with OSPF packets, their purpose, and contents. […]

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IS-IS routing protocol https://tutorzine.com
Networking

IS-IS Routing Protocol

IS-IS is a link-state routing protocol originally specified in ISO/IEC standard 10589:2002, and initially created for OSI networks. Internally, it uses the same Dijkstra Shortest Path First (SPF) algorithm as Open Shortest Path First (OSPF). IS-IS uses so-called Network Service Access Point (NSAP) addressing, to identify individual routers, their area memberships, and their adjacencies. IS-IS is […]

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Confederations in iBGP https://tutorzine.com
Networking

BGP Confederations and Route Reflectors

One method to overcome the black-hole issue is to simply use BGP to advertise all the BGP-learned prefixes to all routers in the AS. Because all routers know the prefixes, sync can be disabled safely. The downside is the introduction of BGP onto all routers, and the addition of iBGP neighbor connections between each pair […]

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BGP Path Attributes https://tutorzine.com
Networking

BGP Path Attributes

BGP supports a wide variety of Path Attributes (PA). Some of the PAs exist solely to be used as part of the litany of options in the BGP best-path algorithm, some have nothing to do with the BGP best-path algorithm, and some impact the best-path algorithm as well as being used for other purposes. For […]

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