Cisco IOS XE

{{Short description|Operating system for network equipment}}

{{Infobox OS

| name = Cisco IOS XE

| developer = Cisco Systems

| source_model = Closed source

| supported_platforms = Some Cisco routers (such as ASR 1000) and some Catalyst switches (such as 3850)

| ui = Command line interface

| family = Unix-like

| working_state = Current

| website = {{URL|cisco.com/c/en/us/products/ios-nx-os-software/ios-xe/|Cisco IOS XE}}

| latest_release_version = {{wikidata|property|preferred|references|edit@end|Q23016711|P348}}

| latest_release_date = {{release date and age|{{wikidata|qualifier|preferred|single|Q23016711|P348|P577}}}}

| preceded by = Cisco IOS

}}

IOS XE is a release train of Cisco Systems' widely deployed Internetworking Operating System (IOS), introduced with the ASR 1000 series.{{cite web |url=https://www.networkworld.com/article/795850/lan-wan-cisco-s-asr-1000-router-built-for-10-year-tenure.html |title=Cisco's ASR 1000 router built for 10-year tenure |author=David Newman |publisher=Network World, Inc. |date=2009-01-12 |access-date=2016-01-05}}

It is built on Linux{{cite web |url=https://packetzone.wordpress.com/2014/05/12/logging-into-a-linux-shell-from-a-cisco-asr1000-series-router/ |title=Logging into a Linux shell from a Cisco ASR1000 Series Router |date=2014-05-12 |accessdate=2016-01-05}}{{cite web |url=http://www.cisco.com/c/en/us/products/collateral/routers/asr-1000-series-aggregation-services-routers/product_bulletin_c25-448387.html |title=Cisco IOS XE Software for Cisco ASR 1000 Series Routers |publisher=Cisco Systems |year=2012 |accessdate=2016-01-05}} and provides a distributed software architecture that moves many operating system responsibilities out of the IOS process{{cite web |url=https://www.networkworld.com/article/761605/cisco-subnet-now-a-look-at-cisco-ios-xe-for-the-asrs.html |title=Now a Look at Cisco IOS XE for the ASRs |author=Michael Morris |publisher=Network World, Inc. |date=2009-01-26 |access-date=2016-01-05}}{{cite web |url=http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg/Software_Packaging_Architecture.html |title=Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide | publisher=Cisco Systems | accessdate=2016-01-05}} and has a copy of IOS running as a separate process.{{cite web |url=http://networkingnerd.net/2013/04/18/ios-x-treme/ |title=IOS X-Treme! |author=Tom Hollingsworth |date=2013-04-18 |accessdate=2016-01-05}} Since it runs a copy of IOS, all CLI commands are the same between Cisco IOS and IOS XE, in contrast to IOS XR, which has a completely different code base and whose developers implemented a different CLI command set.