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Cisco nx os software architecture

cisco nx os software architecture

Cisco NX-OS Software Architecture NX-OS Modular Architecture Cisco Public. NX-OS: Designed for the Data Centre. NX-OS. SAN-OS. Cisco NX-OS helps network operations move at the speed of business, with comprehensive automation and flexible open architectures for your data center. The Cisco® NX-OS Software operates on the Cisco MDS storage networking switches It is created with the Linux-based software architecture as a reference. DOWNLOAD TEAMVIEWER TEAMVIEWER

The Introducing Cisco NX-OS Switches and Fabrics in the Data Center DCINX course gives you a technical overview of the Cisco Nexus Switches key capabilities including platforms, architecture, software, management, and features that contribute to performance, high availability, flexibility, operational simplicity, and investment protection. This Cisco data center course is for technical decision makers and IT professionals who architect, implement, and manage Cisco Nexus switches in data center environments.

We are gathering the data for this course from the other countries… this will take a little time… please be patient. Public Classroom Price. Event at company. Traditional Classroom Learning. Learning that is virtual. Download Course Details. Course Overview Top. Course Schedule Top.

Figure 5. This feature eases the commissioning and decommissioning of server racks with zero-touch installation and automatic configuration of fabric extenders. Consolidation, cabling reduction, rack-space reduction, reduced power and cooling, investment protection through feature inheritance from the parent switch, and the capability to add functions without the need for a major equipment upgrade of server-attached infrastructure all contribute to reduced OpEx and CapEx.

Figure 6. It enables advanced networking and security features and performs switching between directly attached virtual machines. The VSM also provides integration with the hypervisor management tools. Such an identifier is used inline to granularly identify specific traffic destined for or originated by a given virtualized endpoint. This approach allows specific streams of traffic within an aggregate to be identified and associated with a specific virtualized endpoint for more granular and efficient application of network-based services and policies.

Figure 7. Individual features are loaded, enabled, and made available to the system platform based on Cisco NX-OS electronic licensing. Therefore, only a single image is available for download for a given version on a given platform. No decoder or version and feature chart is required to determine which image is appropriate for a given environment.

CallHome enables rapid escalation of events and proactive prevention of a pending failure. Configuration snapshots, or checkpoints, can be created manually at the CLI or initiated automatically by the system at major configuration events such as the disabling of a feature. Checkpoints can be stored locally on the device in the local checkpoint database or in a file in integrated or removable storage.

Using the rollback capability, the current running configuration can be restored to a particular state stored in a checkpoint. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Standard Posted by Gabe Rosas. Comments Leave a comment. What You Will Learn Modern data centers power businesses through a new generation of applications and services.

Virtualization, cloud computing, high-performance computing, data warehousing, and disaster recovery strategies, among others prevalent in the current environment, are prompting a whole new set of requirements for network infrastructure. To meet the needs of the modern data center. This document describes the features of Cisco NX-OS operating system to help you understand how it can meet the needs of your organization.

Cisco NX-OS is a highly-evolved modular operating system that builds on more than 15 years of innovation and experience in high-performance switching and routing. As a direct result of having been deployed and evolving from nearly a decade in the extremely critical storage area networking space, NX-OS can deliver the performance, reliability, and lifecycle expected in the data center. By using a version 2. The choice of Linux over other operating systems and of the Linux 2.

The following are some of the reasons for this choice:. The multithreaded preemptive multitasking capability provides protected fair access to kernel and CPU resources. This approach helps ensure that critical system processes and services are never starved for processor time. This feature, in turn, helps preserve system and network stability by helping ensure that routing protocols, spanning tree, and internal service processes get access to the CPU cores as needed.

NX-OS incorporates a highly scalable CPU queue and process management architecture which employs multiple processor thread run-queues. This in turn enables more efficient use of modern multi-core CPUs. Combined with its memory mapping techniques and path to bit, NX-OS provides simplified scalability both upwards and downwards to accommodate both control plane growth and multiple platforms.

Several categories of modular system code are built on top of the Linux kernel Figure 1. These can be generally described as:. The platform-dependent hardware-related modules consist of subsystems such as hardware and chipset drivers specific to a particular hardware platform on which Cisco NX-OS runs.

This portion of the OS is the part that must be ported across hardware platforms and allow the other subsystems within the OS to communicate with and tie into the specific hardware features of a platform. The platform-dependent modules typically provide standardized APIs and messaging capabilities to upper-layer subsystems. The modules essentially constitute a hardware abstraction layer to enable consistent development at higher layers in the OS, improving overall OS portability.

The defined nature of the platform-dependent modules enables the overall reduction of the code base that specifically requires porting to deliver Cisco NX-OS on other hardware platforms. The result is greater consistency in implementation, reduced complexity in defect resolution, and faster implementation of cross-platform features across the various Cisco NX-OS platforms. The system infrastructure modules provide essential base system services that enable system process management, fault detection, fault recovery, and interservice communication.

The system management component of the system infrastructure provides service management for other features of the OS. It is also the component responsible for fault detection for the feature services, and it is fully capable of performing fault recovery of a feature service as needed. Working together with other infrastructure modules services, it can provide stateful fault recovery of a feature, enabling recovery of a fault within a specific feature in less than a second, while preserving the runtime state of that feature.

This capability enables transparent and nondisruptive fault recovery within the system, increasing overall network stability and service uptime. The individual feature modules consist of the actual underlying services responsible for delivering a particular feature or protocol capability. Each feature is implemented as an independent, memory-protected process spawned as needed based on the overall system configuration.

This approach differs from that of traditional network operating systems in that only the specific features that are configured are automatically loaded and started. This highly granular approach to modularity enables benefits such as:. In addition to the resiliency gained from architectural improvements, Cisco NX-OS provides internal hierarchical and multilayered system fault detection and recovery mechanisms.

No software system is completely immune to problems, so an effective strategy for detecting and recovering from faults quickly and with as little effect as possible is essential. Cisco NX-OS is designed from the start to provide this capability. Individual service and feature processes are monitored and managed by the Cisco NX-OS System Manager, an intelligent monitoring service with integrated high-availability logic.

The system manager can detect and correct a failure or lockup of any feature service within the system. The kernel itself is monitored through hardware. A hardware process constantly monitors the kernel health and activity. Any fault, failure, or lockup at the kernel level is detected by hardware and will trigger a supervisor switchover.

Figure 2 shows the fault detection and recovery process. The combination of these multilevel detection and health monitoring systems provides creates a robust and resilient operating environment that can reduce the overall effect of internal faults and, more importantly, preserve the stability of the overall network by internalizing these types of events.

Cisco NX-OS is designed from the start to provide consistent, predictable, and reliable high availability. The design goal for the data center is continuous operation: no service disruption. When running on platforms that offer redundant control-plane hardware, Cisco NX-OS is designed to provide efficient event-based state synchronization between active and standby control-plane entities. This approach allows the system to rapidly perform a fully stateful control-plane switchover with little system disruption and no service disruption.

For platforms without redundant control planes, Cisco NX-OS can implement ISSU by retaining the software state throughout the upgrade process and retaining packet-forwarding intelligence through its hardware subsystems, preventing service disruption. Cisco NX-OS is also designed to take full advantage of the distributed environment on platforms with distributed hardware forwarding, so that data-plane forwarding is not affected during redundant control-plane switchover.

This architecture effectively delivers true nondisruptive control-plane failover that has been verified to date by several independent third-party sources. At its core, Cisco NX-OS is designed to take advantage of distributed platforms to reduce any effects on the data plane during control-plane operations, including software upgrades. Again, on platforms designed to be highly distributed, it uses this same high-availability infrastructure and distributed architecture to deliver fully non disruptive ISSU.

The control planes of a distributed system are upgraded without affecting data-plane forwarding, and after the control planes are successfully upgraded, the control-plane portions of any forwarding hardware that can be nondisruptively upgraded are serviced. This approach effectively transforms planned maintenance windows so that they longer automatically imply a service outage.

This increased level of continuous operation successfully accommodates business-critical environments, in which little downtime or degradation of service is essential. For decades, Cisco IOS Software has been the foundation for routing and switching configuration in all environments. Typically, most networking professionals will also quickly find themselves seeking those functional enhancements in other operating systems.

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