Troubleshooting BGP

Author: Vinit Jain
Publisher: Cisco Press
ISBN: 013443658X
Format: PDF, ePub, Mobi
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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.

BGP

Author: Iljitsch van Beijnum
Publisher: "O'Reilly Media, Inc."
ISBN: 9781449390822
Format: PDF, Mobi
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Border Gateway Protocol (BGP) is the routing protocol used to exchange routing information across the Internet. It makes it possible for ISPs to connect to each other and for end-users to connect to more than one ISP. BGP is the only protocol that is designed to deal with a network of the Internet's size, and the only protocol that can deal well with having multiple connections to unrelated routing domains.This book is a guide to all aspects of BGP: the protocol, its configuration and operation in an Internet environment, and how to troubleshooting it. The book also describes how to secure BGP, and how BGP can be used as a tool in combating Distributed Denial of Service (DDoS) attacks. Although the examples throughout this book are for Cisco routers, the techniques discussed can be applied to any BGP-capable router.The topics include: Requesting an AS number and IP addresses Route filtering by remote ISPs and how to avoid this Configuring the initial BGP setup Balancing the available incoming or outgoing traffic over the available connections Securing and troubleshooting BGP BGP in larger networks: interaction with internal routing protocols, scalability issues BGP in Internet Service Provider networks The book is filled with numerous configuration examples with more complex case studies at the end of the book to strengthen your understanding. BGP is for anyone interested in creating reliable connectivity to the Internet.

BGP Design and Implementation

Author: Randy Zhang
Publisher: Cisco Press
ISBN: 1587058634
Format: PDF, Mobi
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This is the eBook version of the printed book. If the print book includes a CD-ROM, this content is not included within the eBook version. Learn practical guidelines for designing and deploying a scalable BGP routing architecture Up-to-date coverage of BGP features like performance tuning, multiprotocol BGP, MPLS VPN, and multicast BGP In-depth coverage of advanced BGP topics to help design a complex BGP routing architecture Practical design tips that have been proven in the field Extensive configuration examples and case studies BGP Design and Implementation focuses on real-world problems and provides not only design solutions, but also the background on why they are appropriate and a practical overview of how they apply into a top-down design. The BGP protocol is being used in both service provider and enterprise networks. The design goals of these two groups are different, leading to different architectures being used in each environment. The title breaks out the separate goals, and resulting solutions for each group to assist the reader in further understanding different solution strategies. This book starts by identifying key features and functionality in BGP. It then delves into the topics of performance tuning, routing policy development, and architectural scalability. It progresses by examining the challenges for both the service provider and enterprise customers, and provides practical guidelines and a design framework for each. BGP Design and Implementation finishes up by closely looking at the more recent extensions to BGP through Multi-Protocol BGP for MPLS-VPN, IP Multicast, IPv6, and CLNS. Each chapter is generally organized into the following sections: Introduction, Design and Implementation Guidelines, Case Studies, and Summary.

Practical BGP

Author: Russ White
Publisher: Addison-Wesley Professional
ISBN: 9780321127006
Format: PDF, ePub, Docs
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PRACTICAL BGP""I would recommend this book to network engineers, Internet service providers, network software developers, and IT staff who need to deal with network planning and routing."""-Enke Chen, Redback Networks"Hands-on guidance for deploying and optimizing BGP networks-enterprise and ISPNow there's a practical guide to deploying and managing BGPv4 in "any "environment-from small enterprises to the largest Tier 2 and Tier 3 service providers. A team of the world's leading BGP experts brings together powerful insights into network design, configuration, and deployment with the latest version of BGP-including hands-on guidance for leveraging its key enhancements. Coverage includes- Best practices and diverse real-world scenarios for applying BGPv4- Understanding the impact of BGP design on local networks and the global Internet backbone- Building effective BGP policies: aggregation, propagation, accounting, and more- Maximizing scalability and performance in BGPv4 networks- BGP and network security, including Secure Origin BGP- Deploying BGP/MPLS Layer 3 VPNs- "Extensive troubleshooting guidance unavailable in any other book"If you're a network engineer or administrator looking to drive maximum reliability and performance from BGP-based networks, "Practical BGP "will help you get the job done-from start to finish.RUSS WHITE is a Network Protocols Deployment Engineer in Cisco Systems Routing DNA Team specializing in routing protocols. A widely recognized expert in networking, he co-chairs the IETF Routing Protocols Security working group, and co-authored Advanced IP Network Design, IS--IS for IP Networks, and Inside Cisco IOS Software Architecture.DANNY McPHERSON is a member of the Architecture Team at Arbor Networks. He has held technical leadership positions with several global ISPs, is active within the IETF, and is an acknowledged expert in Internet architecture and security. He co-authored Internet Routing Architectures, Second Edition.SRIHARI SANGLI, Senior Manager for MPLS and routing development at Procket Networks, was formerly Senior Technical Leader in Cisco's IOS Routing Protocols group. He, along with others at Cisco, coded the industry-first implementation of BGP/MPLS based Layer-3 VPN.

Cisco BGP 4 Command and Configuration Handbook

Author: William R. Parkhurst
Publisher: Cisco Press
ISBN: 158705017X
Format: PDF
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"Cisco BGP-4 Command and Configuration Handbook is a clear, concise, and complete source of documentation for all Cisco IOS Software BGP-4 commands. If you are preparing for the CCIE written and lab exams, this book can be used as a laboratory guide to learn the purpose and proper use of every BGP command. If you are a network designer, this book can be used as a ready reference for any BGP command." "Cisco BGP-4 Command and Configuration Handbook provides example scenarios that demonstrate the proper use of every BGP-4 command, which can be implemented using a minimum number of routers. This will enable you to learn each command without requiring an extensive and expensive lab configuration. The scenarios are presented so that the purpose and use of each command can be demonstrated without clouding the issue. Some of the examples lead you into common non-working situations in order to reinforce the understanding of the operation of the particular BGP command."--BOOK JACKET.Title Summary field provided by Blackwell North America, Inc. All Rights Reserved

IP Routing on Cisco IOS IOS XE and IOS XR

Author: Brad Edgeworth
Publisher: Cisco Press
ISBN: 0133846768
Format: PDF, Docs
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An Essential Guide to Understanding and Implementing IP Routing Protocols Cisco’s authoritative single-source guide to IP routing protocols for enterprise and service provider environments Service providers and large enterprises are converging on a common IP infrastructure that supports rapid deployment of high-value services. Demand is soaring for highly skilled IP network engineers who can implement and run these infrastructures. Now, one source combines reliable knowledge about contemporary IP routing protocols and expert hands-on guidance for using them with Cisco IOS, IOS XE, and IOS XR operating systems. After concisely reviewing the basics, three Cisco experts fully explain static routing, EIGRP, OSPF, IS-IS, and BGP routing protocols. Next, they introduce advanced routing with policies and redistribution, sophisticated BGP-based traffic engineering, and multicast. They present comprehensive coverage of IPv6, from its multicast implementation to its completely revamped address structure. Finally, they discuss advanced high availability techniques, including fast routing convergence. IP Routing on Cisco IOS, IOS XE, and IOS XR presents each protocol conceptually, with intuitive illustrations, realistic configurations, and appropriate output. To help IOS users master IOS XE and IOS XR, differences in operating systems are explicitly identified, and side-by-side feature command references are presented. All content fully aligns with [email protected], providing efficient self-study for multiple Cisco Career Certifications, including CCNA®/CCNP®/CCIE® Service Provider, CCIE Routing & Switching, Cisco IOS XR Specialist Certification, and the routing components of several additional Cisco Certifications. Brad Edgeworth, CCIE No. 31574 (R&S & SP) has been with Cisco since 2011 as Systems Engineer and Technical Leader. Formerly a network architect and consultant for various Fortune® 500 companies, his 18 years of IT experience includes extensive architectural and operational work in enterprise and service provider environments. He is a Cisco Live distinguished speaker presenting on IOS XR. Aaron Foss, CCIE No. 18761 (R&S & SP), a High Touch Engineer with the Cisco Focused Technical Support (FTS) organization, works with large service providers to troubleshoot MPLS, QoS, and IP routing issues. He has more than 15 years of experience designing, deploying, and troubleshooting IP networks. Ramiro Garza Rios, CCIE No. 15469 (R&S, SP, and Security), Senior Network Consulting Engineer with Cisco Advanced Services, plans, designs, implements, and optimizes next-generation service provider networks. Before joining Cisco in 2005, he was Network Consulting and Presales Engineer for a Cisco Gold Partner in Mexico, where he planned and deployed both enterprise and service provider networks. Foreword by Norm Dunn, Senior Product Manager, [email protected] Global Product Management, Service Provider Portfolio Understand how IOS®, IOS XE, and IOS XR operating systems compare Master IPv4 concepts, addressing structure, and subnetting Learn how routers and routing protocols work, and how connected networks and static routes behave from the router’s perspective Work with EIGRP and distance vector routing Deploy basic and advanced OSPF, including powerful techniques for organizing routing domains, path selection, and optimization Compare IS-IS with OSPF, and implement advanced IS-IS multilevel routing, optimization, and path selection Make the most of BGP and route manipulation, including IOS/IOS XE route maps and IOS XR’s highly scalable Route Policy Language Use advanced policy-based route manipulation and filtering Implement route redistribution: rules, potential problems, and solutions Leverage BGP communities, summaries, and other router conservation techniques Discover how IPv6 changes IP address and command structure Establish highly efficient multicast routing in IPv4 and IPv6 environments Systematically improve network availability and operational uptime through event driven detection and fast routing convergence

Troubleshooting Cisco Nexus Switches and Nx os

Author: Vinit Jain
Publisher: Pearson Professional
ISBN: 9781587145056
Format: PDF, Mobi
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This is today's best single source for the techniques you need to troubleshoot problems with Cisco Nexus switches running the NX-OS operating system. Bringing together content previously spread across multiple sources and Cisco Press titles, it presents up-to-the-minute feature-level and architectural-level information that is indispensable for troubleshooting NX-OS software and Nexus hardware. Three expert authors emphasize the Nexus NxOS-related problems you're most likely to encounter in real-world deployments, including issues that have caused major datacenter outages over the years. Drawing on their deep experience with large Cisco customers, they offer authoritative hands-on guidance for troubleshooting IGP, BGP, Nexus Fabric, FabricPath, VPC, VPC+, VLANs, STP, Port Channel, IPv6 and other IP services, EIGRP, OSPF, IS-IS, BGP, RPM, PBR, high availability, OTV, VxLAN, VxLAN BGP-EVPN, and much more. You'll master state-of-the-art troubleshooting techniques for both control plane forwarding and data plane / data path problems, and gain essential knowledge of NX-OS APIs for automating the network and simplifying troubleshooting. For each feature, key concepts are presented, followed by basic configuration and detailed troubleshooting techniques, complete with illustrations. Wherever appropriate, significant platform specific behaviors are described and analyzed. Troubleshooting Cisco Nexus Switches and NX-OS will be an indispensable technical resource for all network consultants, system/support engineers, network operations professionals and CCNP/CCIE certification candidates working in the datacenter domain.

Cisco IOS XR Fundamentals

Author: Mobeen Tahir
Publisher: Pearson Education
ISBN: 9781587140075
Format: PDF, Kindle
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Cisco IOS XR Fundamentals is a systematic, authoritative guide to configuring routers with Cisco IOS® XR, the next-generation flagship Cisco® Internet operating system. In this book, a team of Cisco experts brings together quick, authoritative, and example-rich reference information for all the commands most frequently used to configure and troubleshoot Cisco IOS XR-based routers in both service provider and enterprise environments. The authors walk you through the details of the Cisco IOS XR architecture and explain commands in the new Cisco IOS XR CLI wherever required. They present concise explanations of service provider requirements and internetwork theory, backed by proven sample configurations for IOS XR services, MPLS, multicast, system management, system security, routing, and interfaces. Cisco IOS XR Fundamentals is an indispensable resource for designing, implementing, troubleshooting, administering, or selling networks containing Cisco IOS XR–supported routers. This is the only Cisco IOS XR book that: Clearly explains how Cisco IOS XR meets the emerging requirements of both current and future networks Gives network professionals extensive information for simplifying migration and taking full advantage of Cisco IOS XR’s new power Presents detailed, tested configuration examples that network professionals can apply in their own networks Walks through using new Cisco IOS XR features and the In-Service Software Upgrade (ISSU) process to minimize downtime and cost Use Cisco IOS XR to deliver superior scalability, availability, security, and service flexibility Understand the Cisco IOS XR distributed, modular architecture Design, implement, and troubleshoot networks containing Cisco IOS XR–supported routers Configure Cisco IOS XR routing, including RIP, IS-IS, OSPF, and EIGRP Learn BGP implementation details specific to Cisco IOS XR and using RPL to influence policies Manage IP addresses and Cisco IOS XR services Secure Cisco IOS XR using standard and extended ACLs, prefix lists, and uRPF Master all facets of MPLS configuration, including LDP, L3VPN, and TE Configure PIM, IGMP, and static RP multicast Optimize networks using advanced Cisco IOS XR features, including secure domain routers Learn building blocks of Multishelf, and understand configurations and migration techniques This book is part of the Cisco Press® Fundamentals Series. Books in this series introduce networking professionals to new networking technologies, covering network topologies, sample deployment concepts, protocols, and management techniques.

IPv6 Fundamentals

Author: Rick Graziani
Publisher: Cisco Press
ISBN: 0133033473
Format: PDF, ePub, Docs
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To support future business continuity, growth, and innovation, organizations must transition to IPv6, the next generation protocol for defining how computers communicate over networks. IPv6 Fundamentals provides a thorough yet easy-to-understand introduction to the new knowledge and skills network professionals and students need to deploy and manage IPv6 networks. Leading networking instructor Rick Graziani explains all the basics simply and clearly, one step at a time, providing all the details you’ll need to succeed. Building on this introductory coverage, he then introduces more powerful techniques that involve multiple protocols and processes and provides hands-on resources you can rely on for years to come. You’ll begin by learning why IPv6 is necessary, how it was created, and how it works. Next, Graziani thoroughly introduces IPv6 addressing, configuration options, and routing protocols, including RIPng, EIGRP for IPv6, and OSPFv3. You’ll learn how to integrate IPv6 with IPv4, enabling both protocols to coexist smoothly as you move towards full reliance on IPv6. Throughout, Graziani presents all the IOS command syntax you’ll need, offering specific examples, diagrams, and Cisco-focused IPv6 configuration tips. You’ll also find links to Cisco white papers and official IPv6 RFCs that support an even deeper understanding. Rick Graziani teaches computer science and computer networking courses at Cabrillo College. He has worked and taught in the computer networking and IT field for nearly 30 years, and currently consults for Cisco and other leading clients. Graziani’s recent Cisco Networking Academy Conference presentation on IPv6 Fundamentals and Routing drew a standing audience and the largest virtual audience for any session at the event. He previously worked for companies including Santa Cruz Operation, Tandem Computers, and Lockheed. · Understand how IPv6 overcomes IPv4’s key limitations · Compare IPv6 with IPv4 to see what has changed and what hasn’t · Represent IPv6 addresses, including subnet addresses · Enable IPv6 on router interfaces using static, dynamic, EUI-64, unnumbered, SLAAC, and DHCPv6 approaches · Improve network operations with ICMPv6 and Neighbor Discovery Protocol · Configure IPv6 addressing and Access Control Lists using a common topology · Work with IPv6 routing tables and configure IPv6 static routes · Compare, configure, and verify each IPv6 IGP routing protocol · Implement stateful and stateless DHCPv6 services · Integrate IPv6 with other upper-level protocols, including DNS, TCP, and UDP · Use dual-stack techniques to run IPv4 and IPv6 on the same device · Establish coexistence between IPv4 and IPv6 through manual, 6to4, or ISATAP tunneling · Promote a smooth transition with NAT64 (Network Address Translation IPv6 to IPv4) · This book is part of the Cisco Press Fundamentals Series. Books in this series introduce networking professionals to new networking technologies, covering network topologies, sample deployment concepts, protocols, and management techniques.

Building Data Centers with VXLAN BGP EVPN

Author: David Jansen
Publisher: Cisco Press
ISBN: 0134514920
Format: PDF, Kindle
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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