Troubleshooting Cisco Nexus Switches And Nx Os

The definitive deep-dive guide to hardware and software troubleshooting on Cisco Nexus switches The Cisco Nexus platform and NX-OS switch operating system combine to deliver unprecedented speed, capacity, resilience, and flexibility in today's data center networks. Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these business-critical technologies. Three expert authors draw on deep experience with large Cisco customers, emphasizing the most common issues in real-world deployments, including problems that have caused major data center outages. Their authoritative, hands-on guidance addresses both features and architecture, helping you troubleshoot both control plane forwarding and data plane/data path problems and use NX-OS APIs to automate and simplify troubleshooting. Throughout, you'll find real-world configurations, intuitive illustrations, and practical insights into key platform-specific behaviors. This is an indispensable technical resource for all Cisco network consultants, system/support engineers, network operations professionals, and CCNP/CCIE certification candidates working in the data center domain. · Understand the NX-OS operating system and its powerful troubleshooting tools · Solve problems with cards, hardware drops, fabrics, and CoPP policies · Troubleshoot network packet switching and forwarding · Properly design, implement, and troubleshoot issues related to Virtual Port Channels (VPC and VPC+) · Optimize routing through filtering or path manipulation · Optimize IP/IPv6 services and FHRP protocols (including HSRP, VRRP, and Anycast HSRP) · Troubleshoot EIGRP, OSPF, and IS-IS neighbor relationships and routing paths · Identify and resolve issues with Nexus route maps · Locate problems with BGP neighbor adjacencies and enhance path selection · Troubleshoot high availability components (BFD, SSO, ISSU, and GIR) · Understand multicast protocols and troubleshooting techniques · Identify and solve problems with OTV · Use NX-OS APIs to automate troubleshooting and administrative tasks

Cisco® Nexus switches and the new NX-OS operating system are rapidly becoming the new de facto standards for data center distribution/aggregation layer networking. NX-OS builds on Cisco IOS to provide advanced features that will be increasingly crucial to efficient data center operations. NX-OS and Cisco Nexus Switching is the definitive guide to utilizing these powerful new capabilities in enterprise environments. In this book, three Cisco consultants cover every facet of deploying, configuring, operating, and troubleshooting NX-OS in the data center. They review the key NX-OS enhancements for high availability, virtualization, In-Service Software Upgrades (ISSU), and security. In this book, you will discover support and configuration best practices for working with Layer 2 and Layer 3 protocols and networks, implementing multicasting, maximizing serviceability, providing consistent network and storage services, and much more. The authors present multiple command-line interface (CLI) commands, screen captures, realistic configurations, and troubleshooting tips—all based on their extensive experience working with customers who have successfully deployed Nexus switches in their data centers. Learn how Cisco NX-OS builds on and differs from IOS Work with NX-OS user modes, management interfaces, and system files Configure Layer 2 networking: VLANs/private VLANs, STP, virtual port channels, and unidirectional link detection Configure Layer 3 EIGRP, OSPF, BGP, and First Hop Redundancy Protocols (FHRPs) Set up IP multicasting with PIM, IGMP, and MSDP Secure NX-OS with SSH, Cisco TrustSec, ACLs, port security, DHCP snooping, Dynamic ARP inspection, IP Source Guard, keychains, Traffic Storm Control, and more Build high availability networks using process modularity and restart, stateful switchover, nonstop forwarding, and in-service software upgrades Utilize NX-OS embedded serviceability, including Switched Port Analyzer (SPAN), Smart Call Home, Configuration Checkpoint/Rollback, and NetFlow Use the NX-OS Unified Fabric to simplify infrastructure and provide ubiquitous network and storage services Run NX-OS on Nexus 1000V server-based software switches This book is part of the Networking Technology Series from Cisco Press®, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.

Unlock the full potential of your network infrastructure with our comprehensive Cisco NX-OS Guide. Whether you're a seasoned network administrator or just diving into the world of Cisco Nexus switches, our step-by-step guide empowers you to master the art of configuring and managing Cisco NX-OS effortlessly. From essential commands and best practices to advanced features like Virtual Device Contexts (VDC), FabricPath, and Virtual Port Channels (vPC), our guide is your go-to resource for building a resilient, high-performance network. Explore in-depth tutorials, troubleshooting tips, and hands-on examples to streamline your experience with this powerful network operating system. Elevate your networking prowess with the insights and expertise found within our Cisco NX-OS Guide — your gateway to a seamlessly configured, optimized, and secure network environment.

Unlock the full potential of your network infrastructure with our comprehensive Cisco NX-OS Guide. Whether you're a seasoned network administrator or just diving into the world of Cisco Nexus switches, our step-by-step guide empowers you to master the art of configuring and managing Cisco NX-OS effortlessly. From essential commands and best practices to advanced features like Virtual Device Contexts (VDC), FabricPath, and Virtual Port Channels (vPC), our guide is your go-to resource for building a resilient, high-performance network. Explore in-depth tutorials, troubleshooting tips, and hands-on examples to streamline your experience with this powerful network operating system. Elevate your networking prowess with the insights and expertise found within our Cisco NX-OS Guide — your gateway to a seamlessly configured, optimized, and secure network environment.

The complete guide to building and managing next-generation data center network fabrics with VXLAN and BGP EVPN This is the only comprehensive guide and deployment reference for building flexible data center network fabrics with VXLAN and BGP EVPN technologies. Writing for experienced network professionals, three leading Cisco experts address everything from standards and protocols to functions, configurations, and operations. The authors first explain why and how data center fabrics are evolving, and introduce Cisco’s fabric journey. Next, they review key switch roles, essential data center network fabric terminology, and core concepts such as network attributes, control plane details, and the associated data plane encapsulation. Building on this foundation, they provide a deep dive into fabric semantics, efficient creation and addressing of the underlay, multi-tenancy, control and data plane interaction, forwarding flows, external interconnectivity, and service appliance deployments. You’ll find detailed tutorials, descriptions, and packet flows that can easily be adapted to accommodate customized deployments. This guide concludes with a full section on fabric management, introducing multiple opportunities to simplify, automate, and orchestrate data center network fabrics. Learn how changing data center requirements have driven the evolution to overlays, evolved control planes, and VXLAN BGP EVPN spine-leaf fabrics Discover why VXLAN BGP EVPN fabrics are so scalable, resilient, and elastic Implement enhanced unicast and multicast forwarding of tenant traffic over the VXLAN BGP EVPN fabric Build fabric underlays to efficiently transport uni- and multi-destination traffic Connect the fabric externally via Layer 3 (VRF-Lite, LISP, MPLS L3VPN) and Layer 2 (VPC) Choose your most appropriate Multi-POD, multifabric, and Data Center Interconnect (DCI) options Integrate Layer 4-7 services into the fabric, including load balancers and firewalls Manage fabrics with POAP-based day-0 provisioning, incremental day 0.5 configuration, overlay day-1 configuration, or day-2 operations

The definitive guide to troubleshooting today’s complex BGP networks This is today’s best single source for the techniques you need to troubleshoot BGP issues in modern Cisco IOS, IOS XR, and NxOS environments. BGP has expanded from being an Internet routing protocol and provides a scalable control plane for a variety of technologies, including MPLS VPNs and VXLAN. Bringing together content previously spread across multiple sources, Troubleshooting BGP describes BGP functions in today’s blended service provider and enterprise environments. Two expert authors emphasize the BGP-related issues you’re most likely to encounter in real-world deployments, including problems that have caused massive network outages. They fully address convergence and scalability, as well as common concerns such as BGP slow peer, RT constraint filtering, and missing BGP routes. For each issue, key concepts are presented, along with basic configuration, detailed troubleshooting methods, and clear illustrations. Wherever appropriate, OS-specific behaviors are described and analyzed. Troubleshooting BGP is an indispensable technical resource for all consultants, system/support engineers, and operations professionals working with BGP in even the largest, most complex environments. · Quickly review the BGP protocol, configuration, and commonly used features · Master generic troubleshooting methodologies that are relevant to BGP networks · Troubleshoot BGP peering issues, flapping peers, and dynamic BGP peering · Resolve issues related to BGP route installation, path selection, or route policies · Avoid and fix convergence problems · Address platform issues such as high CPU or memory usage · Scale BGP using route reflectors, diverse paths, and other advanced features · Solve problems with BGP edge architectures, multihoming, and load balancing · Secure BGP inter-domain routing with RPKI · Mitigate DDoS attacks with RTBH and BGP Flowspec · Understand common BGP problems with MPLS Layer 3 or Layer 2 VPN services · Troubleshoot IPv6 BGP for service providers, including 6PE and 6VPE · Overcome problems with VXLAN BGP EVPN data center deployments · Fully leverage BGP High Availability features, including GR, NSR, and BFD · Use new BGP enhancements for link-state distribution or tunnel setup This book is part of the Networking Technology Series from Cisco Press, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.

Advanced real-world Cisco Application Centric Infrastructure (ACI) monitoring and troubleshooting Forewords written by Yusuf Bhaiji, Director of Certifications, Cisco Systems; and Ronak Desai, VP of Engineering for the Data Center Networking Business Unit, Cisco Systems. This expert guide and reference will help you confidently deploy, support, monitor, and troubleshoot ACI fabrics and components. It is also designed to help you prepare for your Cisco DCACIA (300-630) exam, earning Cisco Certified Specialist–ACI Advanced Implementation certification and credit toward CCNP Data Center certification if you choose. Authored by three leading Cisco ACI experts, it combines a solid conceptual foundation, in-depth technical knowledge, and practical techniques. It also contains proven features to help exam candidates prepare, including review questions in most chapters, and Key Topic icons highlighting concepts covered on the exam. The authors thoroughly introduce ACI functions, components, policies, command-line interfaces, connectivity, fabric design, virtualization and service integration, automation, orchestration, and more. Next, they introduce best practices for monitoring and management, including the use of faults, health scores, tools, the REST API, in-band and out-of-band management techniques, and monitoring protocols. Proven configurations are provided, with steps for verification. Finally, they present advanced forwarding and troubleshooting techniques for maximizing ACI performance and value. ACI Advanced Monitoring and Troubleshooting is an indispensable resource for every data center architect, engineer, developer, network or virtualization administrator, and operations team member working in ACI environments. Understand Cisco ACI core functions, components, and protocols Apply the ACI Policy-Based Object Model to develop overall application frameworks Use command-line interfaces to manage and monitor Cisco ACI systems Master proven options for ACI physical and logical fabric design Establish connectivity for compute, storage, and service devices, switches, and routers Gain visibility into virtualization layers through VMM, and integrate hypervisors from multiple vendors Seamlessly integrate Layer 4 to Layer 7 services such as load balancing and firewalling Automate and orchestrate for fast deployment with the REST API, scripting, and Ansible Minimize downtime and maximize ROI through more effective monitoring and configuration Thoroughly master concepts and techniques for advanced ACI and VXLAN forwarding Build deep practical expertise for quickly troubleshooting critical events Gain quick visibility into traffic flows and streamline problem isolation with the ACI Visibility & Troubleshooting Tool Walk through multiple real-world troubleshooting scenarios step-by-step This book is part of the Networking Technology Series from Cisco Press, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.

Pick up where certification exams leave off. With this practical, in-depth guide to the entire network infrastructure, you’ll learn how to deal with real Cisco networks, rather than the hypothetical situations presented on exams like the CCNA. Network Warrior takes you step by step through the world of routers, switches, firewalls, and other technologies based on the author's extensive field experience. You'll find new content for MPLS, IPv6, VoIP, and wireless in this completely revised second edition, along with examples of Cisco Nexus 5000 and 7000 switches throughout. Topics include: An in-depth view of routers and routing Switching, using Cisco Catalyst and Nexus switches as examples SOHO VoIP and SOHO wireless access point design and configuration Introduction to IPv6 with configuration examples Telecom technologies in the data-networking world, including T1, DS3, frame relay, and MPLS Security, firewall theory, and configuration, as well as ACL and authentication Quality of Service (QoS), with an emphasis on low-latency queuing (LLQ) IP address allocation, Network Time Protocol (NTP), and device failures