With IOS Version 12, many different sub-versions of IOS exist, including specialized support for specific platforms the next few sections cover a couple of the most common. This article takes a look at a few of these and how what they are used for. IOS VersionsĪ number of different versions exist within each release of IOS. MD releases (called M releases, or extended release) will be released and have a 44-month support window, whereas ED (T releases, or standard release) will have a 18-month support window.
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With IOS 15 and later, the code bases will be consolidated. With earlier versions of IOS, the different ED (T trains for instance, 12.4T) and MD (not T trains for instance, 12.4) has different code bases. The IOS train paths have also been consolidated. New releases will be considered either ED or MD. With IOS 15 and later, both the LD and GD deployments will be retired.
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Maintenance Deployment (MD): These releases are used to provide additional support for bug fixes and ongoing software maintenance. These tend to be stable on almost all platforms. General Deployment (GD): These releases can be used anywhere in a customer network with the same feature and functionality requirements. LD releases are between an ED release and a GD release. Limited Deployment (LD): These releases do not include any new features or platform support but do include bug fixes. With versions of IOS earlier than 15, a specific image could be considered one of the following four different release types:Įarly Deployment (ED): These releases provide both new features and new platform support in addition to bug fixes. One term that is often used is the IOS release type. Although this is not an exhaustive list of every Cisco version, it does cover the most commonly used versions. This article covers these different releases and aims to give a single location where network engineers can look to figure out what the different releases mean. Although the naming used for some of the newer devices is changing to a simpler structure, it will be a while before all the different versions are consolidated. Send you an email message telling you why.One thing that is often confusing to any network engineer (regardless of level) is the version and naming structure used by Cisco for their IOS images. If we decide not to incorporate your report, we will usually Most reports are processed within a few days of submission.To a printed copy, please include the edition you used. We will attempt to maintain the text of the edition that we worked from, Many books have significant or minor changes between editions.If in doubt, we will always beĬautious, and preserve the original spelling. While we strive to fix printer’s errors, many words found in ourīooks may have archaic spelling.If you think we might need to communicate with
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If the contents of theīook, please be as precise as you can as to the location. Please be clear in your message, if you are referring to the informationįound on this web page or the contents of the book. Neither great writing nor important biography, but persuasively delightful reading.-Kirkus Reviews. Catherine is the focus of the story, but Charles is its hero. Here, as the all too human husband and only love of the Portuguese princess, his charm, his brilliance, his frailties seem somehow in balance, while the stormy period of his reign, much of it clouded by religious dissension, violence, prejudice, by plottings against him even among those he trusted, by plague and fire decimating the city he loved, is a background for a devotion that survived his peccadillos. Charles II has had many admirers, many detractors. Margaret Campbell Barnes has a rare facility in recreating that tapestry. Catherine of Braganza is the subject of an absorbing biographical novel which helps fill some of the gaps in our awareness of the threads of human interest in England's rich tapestry of history.
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