 | |
| Developer | Juniper Networks |
|---|---|
| OS family | Unix-like |
| Working state | Current |
| Source model | Closed source andopen source |
| Initial release | July 7, 1998; 26 years ago (1998-07-07) |
| Latest release | 24.2R1[1] / July 19, 2024; 7 months ago (2024-07-19) |
| Available in | English |
| Userland | FreeBSD[2][3][4] orLinux[5] |
| Default user interface | Command-line interface |
| License | Proprietary,[6]FreeBSD License,GPL License |
| Official website | https://www.juniper.net/us/en/products/network-operating-system/junos-os.html |
Junos OS (also known asJuniper Junos,Junos andJUNOS) is aFreeBSD-basednetwork operating system used inJuniper Networks routing, switching and security devices.[7]
Junos OS was first made available on 7 July 1998. As of 2008, feature updates have been released quarterly.[8] As of January 2025[update], the latest version is Junos OS 24.2, released on July 19, 2024.
Junos operating system is primarily based onFreeBSD onbare metal and later also withLinuxkernel.[8] Because FreeBSD is aUnix implementation, users can access a Unix shell and execute normal Unix commands. Junos runs on most or all Juniper hardware systems.[9] After acquisition of NetScreen by Juniper Networks, Juniper integrated ScreenOS security functions into its own Junos network operating system.[10]
Junos OS has several architecture variations:
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Junos's ecosystem includes aSoftware Development Kit (SDK).[7][11] Juniper Developer Network (JDN)[12] provides the Junos SDK[13] to the 3rd-party developers who want to develop applications for Junos-powered devices such as Juniper Networks routers, switches, and service gateway systems.[14][15][16][17][18] It provides a set of tools andapplication programming interfaces (APIs), including interfaces to Junosrouting, firewall filter, UI and traffic services functions. Additionally, Junos SDK is used to develop other Juniper's products such asOpenFlow for Junos, and other traffic services.
The Junos OScommand-line interface (CLI) is a text-based command interface for configuring, troubleshooting, and monitoring the Juniper device and network traffic associated with it. It supports two types of command modes.
Junos-FIPS 140-2 Security Compliance[21] is a variation of Junos OS, providing users with software tools to configure a network of Juniper Networks devices in aFederal Information Processing Standards (FIPS) environment.
Junos OS offers programming interfaces and the Juniper Extension Toolkit (JET).[22] JET is a standard component of Junos OS, and it runs on all Juniper routers, switches, and security devices. JET simplifies the automation of operational, configuration, and management tasks, providing a set of open and customizable APIs for control, management, and data planes. It supports standardized programming languages for application development and communication to the Junos OS fast programmable database through standardized and open data exchange formats. It also opens up Trio and Express ASICs via a set of third-party controller-specific adapters, including SAI,OpenFlow, andP4.
Junos Fusion[23][24] is a logical device used to reduce network complexity and operational expenses. Two different Junos Fusion architectures are available, one for provider edge and one for enterprise.
Node slicing[25] is a Junos OS feature that enables creating multiple partitions from one physical MX Series router. Each partition behaves as an independent router, with its own dedicated control plane, data plane, and management plane, allowing it to run multiple services on one physical router.
Junos OS supports a variety of routing protocols and applications. It also supportsclass of service (CoS), Ethernet VPN (EVPN), firewall filters and policers, flow monitoring, and Layer 2 features. The Junos OS supports high availability mechanisms that are not standard toUnix, such as Graceful Restart.[26] Junos supports a variety ofrouting protocols. With the introduction of the SRX and J-series (past version 9.3) platforms, it also supports "flow mode", which includes stateful firewalling,NAT, andIPsec. Junos OS generally adheres to industry standards for routing andMPLS.[27]
Secure boot[28] is a system security enhancement based on theUnified Extensible Firmware Interface (UEFI) standard. It works by safeguarding the Basic Input/Output System (BIOS) from tampering or modification and then maintaining that protection throughout the boot process. The secure boot process begins with secure flash, which ensures that unauthorized changes cannot be made to the firmware. Authorized releases of Junos OS carry a digital signature produced by either Juniper Networks directly or one of its authorized partners.
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