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The DNOS family comes in two main versions:
===DNOS6.x===
* DNOS 6.x: This is the operating system running on the Dell Networking N-series (campus) networking switches. It is the latest version of the 'PowerConnect' operating system, running on a Linux Kernel. It is available as upgrade for the PowerConnect 8100 series switches (which then become a Dell Networking N40xx switch) and it also is installed on all DN N2000 and N3000 series switches. It has a full web-based GUI together with a full CLI (command line interface) and the CLI will be very similar to the original PowerConnect CLI, though with a range of new features like PVSTP (per VLAN spanning tree), Policy Based Routing and [[MLAG]].
===DNOS9.x===
* DNOS 9.x: This is the operating system running on Dell Networking S- and Z- series switches and is a further developmentg of the [[FTOS]] or Force10 Operating System. Standard DNOS 9.x (and FTOS) only offers a CLI and no GUI, although with the automation toolset it is possible to create your own webGUI on DNOS9 / FTOS switches. DNOS 9.x is running on [[NetBSD]].
Only the PowerConnect 8100 will be able to run on DNOS 6.x: all other PowerConnect ethernet switches will continue to run its own PowerConnect OS (on top of VxWorks) while the PowerConnect W-series run on a Dell specific version of ArubaOS.
The Dell Networking S- xxxx and Z9x00 series will run on DNOS where the other Dell Networking switches will continue to run FTOS 8.x firmware.
==Hardware Abstraction Layer==
Three of the four product families from Dell Networking are using the [[Broadcom]] [[Broadcom#Trident+ ASIC|Trident+]] [[ASIC]]'s, but the company doesn't use the [[API]]'s from Broadcom: the developers at Dell Networking have written their own [[Hardware Abstraction Layer]] so that DNOS 9.x can run on different hardware platforms with minimal impact for the firmware. Currently three of the four DN switch families are based on the Broadcom Trident family (while the 4th - the E-series- run on self-developed ASIC's<ref>Architecture description of the [http://www.force10networks.com/whitepapers/pdf/wp_DescESeries.pdf Force10 E-series] platform. Force10, 2006. Retrieved: 3 August 2012</ref>); and two of them are running DNOS 9.x (S- and Z- series) and if the product developers want or need to use different hardware for new products they only need to develop a HAL for that new hardware and the same firmware can run on it. This keeps the company flexible and not dependent on a specific hardware-vendor and can use both 3rd party or self designed ASIC's and chipsets.
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