Cisco IOS

  • cisco ios
    developercisco systems
    working statecurrent
    source modelclosed source
    latest release15.8(3)m[1] / january 22, 2019; 14 months ago (2019-01-22)
    available inenglish
    platformsthe majority of cisco routers and current cisco switches
    default user interfacecisco ios

    cisco internetwork operating system (ios) is a family of network operating systems used on many cisco systems routers and current cisco network switches. earlier, cisco switches ran catos. ios is a package of routing, switching, internetworking and telecommunications functions integrated into a multitasking operating system. although the ios code base includes a cooperative multitasking kernel, most ios features have been ported to other kernels such as qnx and linux for use in cisco products.

    not all cisco products run ios. notable exceptions include asa security products, which run a linux-derived operating system, carrier routers which run ios-xr and cisco's nexus switch and fc switch products which run cisco nx-os.

  • history
  • command-line interface
  • architecture
  • routing
  • interface descriptor block
  • packages and feature sets
  • versioning
  • security and vulnerabilities
  • ios xr train
  • see also
  • references
  • external links

Cisco IOS
DeveloperCisco Systems
Working stateCurrent
Source modelClosed source
Latest release15.8(3)M[1] / January 22, 2019; 14 months ago (2019-01-22)
Available inEnglish
PlatformsThe majority of Cisco routers and current Cisco switches
Default user interfaceCisco IOS

Cisco Internetwork Operating System (IOS) is a family of network operating systems used on many Cisco Systems routers and current Cisco network switches. Earlier, Cisco switches ran CatOS. IOS is a package of routing, switching, internetworking and telecommunications functions integrated into a multitasking operating system. Although the IOS code base includes a cooperative multitasking kernel, most IOS features have been ported to other kernels such as QNX and Linux for use in Cisco products.

Not all Cisco products run IOS. Notable exceptions include ASA security products, which run a Linux-derived operating system, carrier routers which run IOS-XR and Cisco's Nexus switch and FC switch products which run Cisco NX-OS.