Internetwork operating system software

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Blogs Networking Blogs Networking News. Project Gallery. New Community Member Guide. Related support document topics. Recognize Your Peers. Spotlight Award Nomination. Reliable adaptive routing also reduces costs by efficiently using network bandwidth and resources while eliminating needless management of static routes. Policy-based IOS features, such as route filtering and routing information translatability, save network resources by preventing data from being unnecessarily broadcast to nodes that do not require it.

Priority output queuing and custom queuing grant priority to important sessions when network bandwidth is saturated. Load balancing makes use of all available paths across the internetwork, preserving valuable bandwidth and improving performance.

And the IOS provides the most effective and efficient scaling available for network applications that require transparent or source-route bridging algorithms. While switching devices based on these technologies provide higher bandwidth than existing shared-media hubs, they fail to offer the scalability, stability, and security of their more intelligent shared-media counterparts.

By distributing routing intelligence and switching functions to create "virtual LANs," CiscoFusion's multilayer switching increases bandwidth while simplifying moves, adds, and changes across the enterprise.

This extends the power and flexibility of the IOS beyond internetwork routers to include the ATM and LAN switches that are increasingly being deployed throughout today's internetworks. Because the large majority of network costs are expended on wide-area network WAN switching and utilization functions, an effective internetwork must optimize all WAN-related operations. Optimization promotes applications availability by increasing network throughput while reducing delay time.

It also minimizes ownership costs by eliminating unnecessary traffic and intelligently selecting the most economical WAN links available. IOS innovations such as dial-on-demand access and dial backup capabilities provide cost-effective alternatives to expensive point-to-point switched leased lines.

And support for advanced, packet-switched services such as X. The Cisco IOS provides an array of network management and security capabilities designed to meet the needs of today's large, complex internetworks.

Integrated management simplifies administrative procedures and shortens the time required to diagnose and fix problems. Automated operations reduce hands-on tasks and make it possible to manage large, geographically dispersed internetworks with a small staff of experts located at a central site. The IOS provides several important management features that are built into every Cisco router.

These include configuration services that lower the cost of installing, upgrading, and reconfiguring routers, as well as comprehensive monitoring and diagnostic services. In addition, the IOS provides valuable information and services to router management applications developed by Cisco and its partners. The IOS's management services are matched by its security capabilities. No organization today can ignore the need to protect valuable information and applications supported on its internetwork.

The Cisco IOS includes a diverse toolkit for partitioning resources and prohibiting access to sensitive or confidential information or processes. Multidimensional filters prevent users from knowing that other users or resources are even on the network. Encrypted passwords, dial-in authentication, multilevel configuration permissions, and accounting and logging features provide protection from, and information about unauthorized access attempts.

Scalability services provide the high degree of flexibility that is necessary to address all of the key issues facing today's internetworks as organizations change and their needs evolve. The IOS's scalable routing protocols help avoid needless congestion, overcome inherent protocol limitations, and bypass many of the obstacles that can arise because of the scope and geographical dispersion of an internetwork.

The IOS also helps to cut costs by reducing network bandwidth and processing overhead, offloading servers and conserving resources, and easing system configuration tasks. Advanced IOS features such as filtering, protocol termination and translation, smart broadcasts, and helper address services combine to create a flexible, scalable infrastructure that can keep pace with evolving network requirements.

Reliable adaptive routing capabilities. WAN optimization services. Management and security features. And scalability services. These are the four principal types of services that the IOS provides, the four cornerstones essential to building a strategic internetwork foundation. The IOS supports the broadest range of applications by virtue of a full portfolio of standards-based interfaces.

Thus, users with very diverse needs and applications from finance, to sales, to engineering can be served by a single, integrated network infrastructure. Wherever a user needs to be in a workgroup, in the data center, in a remote office, or telecommuting across a distance the IOS provides the network resources to increase that user's productivity. In a world where hardware platforms are constantly evolving, software intelligence is the value-added differentiator that ultimately determines the efficiency and effectiveness of any internetwork.