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Dynamips is an emulator computer program that was written to emulate Cisco routers. It was developed by Christophe Fillot, who began working on it in August 2005. Dynamips runs on FreeBSD, Linux, Mac OS X and Windows. It emulates the hardware of the Cisco series routing platforms by directly booting an actual Cisco IOS software image into the ...
Graphical Network Simulator-3 (shortened to GNS3) is a network software emulator first released in 2008. [2] [3] [4] It allows the combination of virtual and real devices, used to simulate complex networks. It uses Dynamips emulation software to simulate Cisco IOS. [2]: 55 [5]
Each IOS Image therefore include a feature set, which determine the command-line interface (CLI) commands and features that are available on different Cisco devices. Upgrading to another feature set therefore entails the installation of a new IOS image on the networking device and reloading the IOS operating system.
However, due to functional limitations, it is intended by Cisco to be used only as a learning aid, not a replacement for Cisco routers and switches. [9] The application itself only has a small number of features found within the actual hardware running a current Cisco IOS version. Thus, Packet Tracer is unsuitable for modelling production networks.
NX-OS is a network operating system for the Nexus-series Ethernet switches and MDS-series Fibre Channel storage area network switches made by Cisco Systems. It evolved from the Cisco operating system SAN-OS, originally developed for its MDS switches. [1] It is based on Wind River Linux and is inter-operable with other Cisco operating systems.
IOS XE is a release train of Cisco Systems' widely deployed Internetworking Operating System (IOS), introduced with the ASR 1000 series. [2]It is built on Linux [3] [4] and provides a distributed software architecture that moves many operating system responsibilities out of the IOS process [5] [6] and has a copy of IOS running as a separate process. [7]
Cisco IOS can be run on both the SP and RP. In this instance, the user is unaware of where a command is being executed on the switch, even though technically two IOS images are loaded—one on each processor. This mode is the default shipping mode for Cisco products and enjoys the support of all new features and line cards.
The inside of a Cisco 1900-series switch. Catalyst is the brand for a variety of network switches, wireless controllers, and wireless access points sold by Cisco Systems.While commonly associated with Ethernet switches, a number of different types of network interfaces have been available throughout the history of the brand.