Juniper OS :: JUNOS and JUNOSe

I'm intersted in oprating system it means their managements for instance process management,memory management and so on also on deadlock detection/avoidance,file system,scheduling strategies and .... I think freeBSD has the best managements and works properly although other OS like SUN Solaris is powerful but FreeBSD is categurised in non-commercial operating system and it comes with full source code. in fact i wanna talk about JUNOS that based on the FreeBSD , first of all please don't pronounce JUN-OS ,you should pronounce just in one syllable.Juniper appliances have JUNOS as operating system which based on the FreeBSD they've modified the freeBSD,extracted some modules and imported specially modified modules and some engines on it. the JUNOS has some parts contain : JKernel (The operating system package) JRoute (The routing engine software) JPFE (The PFE software) JDocs (Updated online reference documentation) Jcrypto (Security software (U.S. domestic only)) Jbase (Additions to JUNOS) Totally they called Jbundle.

Juniper Networks releases several new versions of JUNOS software each year. you can see some feature of JUNOS : - Modularity - JUNOS software employs a modular software design, providing superior resilience and ensuring that new capabilities such as IPv6 can be easily integrated - Routing expertise - Juniper Networks IP routing expertise delivers a full complement of production-hardened routing protocols - Standards-based - thoughtful adherence to industry standards for routing, MPLS, and availability mechanisms such as Protocol Graceful Restart translates to improved stability and reduced operational complexity for customers - Security - JUNOS software combines intelligent packet processing with superior performance to offer customers a potent IP security toolkit - Service richness - whether individual subscriber, enterprise business, or service provider, JUNOS IP services portfolio enables customers to deliver assured experiences to end users of any profile - Policy and control - Juniper Networks SDX and NMC platforms allow customer to invoke and control these powerful JUNOS capabilities; in addition, Juniper Networks JUNOScript XML interface simplifies and accelerates OSS integration Modular software architecture The Juniper appliences load JUNOS from flash memory but they have hard disk for other purpose like syslogs,Backup and so on thereby when they want to become shutdown they should be manually turned off from OS it means execute halt command (request system halt). there isn't any concern about blackout without the shutting down command because at next boot , maybe it takes a few time for checking file system on hard disk drive so if it fails in the worst situation the applience will boot successfully and works properly because the JUNOS is on flash and in this case we don't have backup and logs and so on. Another OS from Juniper is JUNOSe,it's the operating system that powers Juniper Networks market-leading E-series family of edge routers.the Juniper web site said "twenty of the top twenty-five service providers in the world use JUNOSe in their production networks, delivering profitable service to end-user customers. Major publicly announced deployments include: Bell Canada, Cable & Wireless, Deutsche Telekom, France Telecom, Korea Telecom, PCCW, Telstra, Telefonica, XO, and many others.JUNOSe is specifically architected to help service providers migrate from traditional “best effort” IP services to enhanced IP services based on the infranet model." Totally JUNOSe is specifically architectured to address and overcome the challenges that's service provider face at the edge. Some new service in JUNOSe : - Hierarchical QoS capabilities to deliver a voice and data service. - Virtual router and MPLS 2547 VPN technologies. - rolling out IPTV and Video on Demand - A service provider using the per-VLAN queuing, rate limiting, and policy. and .... You can get more information about JUNOS and JUNOSe at the Juniper web site : http://www.juniper.net