Cisco IOS XR Fundamentals is a systematic, authoritative guide to configuring routers with Cisco IOS(R) XR, the next-generation flagship Cisco(R) 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 Mobeen Tahir, CCIE(R) No. 12643 (R&S, SP), is a Cisco network consulting engineer with more than a decade of experience in designing and deploying service provider networks. He currently works for the WWSP practice team, which provides consulting services to Cisco NGN customers. Mark Ghattas, CCIE No. 19706 (Service Provider), is a solution architect at Cisco and has been in the networking industry for more than 15 years. He focuses on IOS XR-based platforms for service providers and currently manages the World Wide Service Provider Practice team in Advanced Services. Dawit Birhanu, CCIE No. 5602, is a technical leader at Cisco. He assists global service providers in deploying new NGN products and technologies. He specializes in IOS XR-based platforms, QoS, MPLS, and BGP. Syed Natif Nawaz, CCIE No. 8825 (R&S, SP), has more than 10 years' experience in providing networking design, deployment, and escalation assistance to service provider customers. He is currently the IOS XE software development manager at Cisco, where he works on customer-focused software qualification, certification, and deployment; feature integration; release processes; and other software quality initiatives. * 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(R) Fundamentals Series. Books in this series introduce networking professionals to new networking technologies, covering network topologies, sample deployment concepts, protocols, and management techniques. Category: Networking: Routing and Switching Covers: Cisco IOS XR
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从知识体系构建的角度来看,这本书的结构安排存在一些明显的不连贯性。它似乎试图涵盖太多的主题,但又没有在任何一个主题上做到面面俱到。章节间的逻辑跳跃性比较大,有时候会突然从一个底层数据链路层的话题,直接跳到高层的管理工具介绍,中间缺失了必要的过渡和解释,让人感觉像是在一个拼凑起来的知识集合中摸索。我记得在讲到QoS(服务质量)的部分,它介绍了整形和管制(Shaping and Policing),但对于如何根据实际业务需求(比如VoIP与视频会议流量的优先级差异)来动态调整这些策略,书中给出的指导非常模糊。这让我不禁怀疑作者在编写时是否充分考虑了现代企业网络中QoS的复杂性和动态性。更令人沮丧的是,书中对一些高级特性,比如MPLS L3VPN的故障排查步骤,仅仅是罗列了几个检查项,完全没有提供任何基于实际错误日志或包捕获的分析案例,这对于需要处理生产环境突发故障的工程师来说,几乎是杯水车薪。它更像是理论的概述,而非实战的指南。
评分阅读体验完全可以用“平淡如水”来形容,几乎没有激起我太多的思考波澜。这本书的叙事方式极其线性,缺乏必要的场景化描述和技术演进的历史背景铺垫。它像一个冷静的记录者,把一系列命令和配置参数罗列出来,然后告诉你“照做即可”。这种方式对于只需要快速完成某个特定任务的技术人员或许方便,但对于我这种希望深入理解“为什么这样设计”的学习者来说,就显得非常乏味了。例如,在讲解安全策略时,书中只是给出了ACL配置的语法,却几乎没有提及在当前零信任架构的大背景下,传统的ACL配置有哪些局限性,以及更先进的微分段技术是如何应对这些挑战的。我试着寻找一些作者对未来发展趋势的预测或者批判性思考,但几乎没有找到。整本书读下来,感觉就像在背诵一份冗长的操作手册,缺乏那种能激发好奇心和探索欲的“火花”。书中的图示也略显简陋,很多复杂的逻辑关系,如果能用更清晰的流程图或状态图来表示,理解起来会事半功倍,现在的图例大多只是简单的方框加箭头,显得有些敷衍。
评分这本书,说实话,拿到手的时候我有点小小的失落。封面设计得挺中规中矩的,没什么让人眼前一亮的惊喜。我本来指望能看到一些更现代、更有视觉冲击力的排版,毕竟现在技术更新换代这么快,内容也应该与时俱进。翻开内页,纸张的质感还可以,但字体和间距的排布感觉像是十几年前的标准模板,有点刻板,读起来缺乏一些亲切感。内容深度上,我感觉它更像是一本入门级的快速参考手册,对于那些已经对网络基础有一定了解的人来说,可能显得有些浅尝辄止。很多核心概念的阐述,虽然准确无误,但总觉得缺少那种拨云见雾的深度解析。比如,在讨论路由协议的收敛性时,书中只是简单地列举了几个影响因素,却没有深入剖析在特定复杂网络拓扑下,这些因素是如何相互作用并导致延迟的,这让我觉得在解决实际复杂问题时,这本书提供的支撑力有限。我更希望看到的是基于真实案例的、多角度的深入探讨,而不是教科书式的定义堆砌。总而言之,它更像是一个合格的“工具箱”,但缺少能让人产生“顿悟”时刻的“大师指点”。
评分坦白说,这本书在解决实际部署中的“灰色地带”问题上几乎没有提供任何帮助。网络配置很少是黑白分明的,总会遇到供应商文档没有覆盖的边缘情况、不同模块间的不兼容性,或者与第三方设备的集成难题。我期待看到一些“陷阱”的提醒,或者作者基于多年经验总结出的“最佳实践”中的“非官方”建议。然而,这本书的语气始终保持着一种高度的理想化状态,仿佛所有配置都能一步到位地完美运行。例如,在自动化和可编程性方面,书中只是简单提到了REST API的存在,但对于如何使用Python或其他脚本语言与该设备进行有效的、幂等的交互,几乎没有着墨。在当前DevOps理念渗透到网络运维的背景下,这种对前沿实践的缺失,使得这本书的参考价值大打折扣。它似乎停留在了一个相对静态的、纯粹命令行操作的时代,未能跟上网络智能化、软件化的大趋势。
评分这本书的选材角度让我感觉有些过时,它似乎更多地关注于对现有稳定功能的重复确认,而非对未来技术演进的探索。阅读过程中,我一直有一种“这内容我好像在五年前的版本里也见过”的感觉,缺乏新意。比如,对于路由器的启动过程和系统软件升级,描述得详尽无可厚非,但这些内容通常在初级认证阶段就已经非常扎实了。真正有价值的提升,应该来自于对新兴技术栈的深入剖析,比如网络功能虚拟化(NFV)在XR平台上的集成,或者最新的容器化服务部署。这本书对此类前沿议题的处理方式是轻描淡写,甚至避而不谈,仿佛这些是“额外选修课”而非“核心必修内容”。这种保守的选材策略,虽然保证了内容的“基础性”,却牺牲了其“前瞻性”和对高阶技术人员的吸引力。结果就是,这本书更适合作为一名对该平台一无所知的新手在考前快速浏览的提纲,而不是一位希望将知识体系升级到最新水平的资深工程师案头必备的深度参考资料。
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