CCNP 642-811 BCMSN（交换）


CCNP 642-811 BCMSN
考试时间：105分钟
考题数目：55-65题
及格分数：690分
考试内容：
Technology
Describe the Enterprise Composite Model used for designing networks and explain how it addresses enterprise network needs for performance, scalability and availability
Describe the physical, data-link and network layer technologies used in a switched network, and identify when to use each
Explain the role of switches in the various modules of the Enterprise Composite Model (Campus Infrastructure, Server Farm, Enterprise Edge, Network Management)
Explain the function of the Switching Database Manager [specifically Content Addressable Memory (CAM) and Ternary Content Addressable Memory (TCAM)] within a Catalyst switch
Describe the features and operation of VLANs on a switched network
Describe the features of the VLAN trunking protocols including 802.1Q, ISL (emphasis on 802.1Q) and dynmic trunking protocol
Describe the features and operation of 802.1Q Tunneling (802.1QinQ) within a service provider network
Describe the operation and purpose of managed VLAN services
Describe how VTP versions 1 and 2 operate including domains, modes, advertisements, and pruning
Explain the function of the Switching Database Manager [specifically Content Addressable Memory (CAM) and Ternary Content Addressable Memory (TCAM)] within a Catalyst switch
Explain the operation and purpose of the Spanning-Tree Protocol (STP) on a switched network
Identify the specific types of Cisco route switch processors, and provide implementation details
List and describe the operation of the key components required to implement interVLAN routing
Explain the types of redundancy in a multilayer switched network including hardware and software redundancy
Explain how IP multicast operates on a multilayer switched network, including PIM, CGMP and IGMP
Describe the quality issues with voice traffic on a switched data network, including jitter and delay
Describe the QoS solutions that address voice quality issues
Describe the features and operation of network analysis modules on Catalyst switches to improve network traffic management
Describe Transparent LAN Services and how they are implemented in a service provider network

Implementation and Operation
Convert CatOS to native IOS on Catalyst switches and manage native IOS images according to best practices
Configure access ports for static and multi-VLAN memebership
Configure and verify 802.1Q trunks
Configure and verify ISL trunks
Configure VTP domains in server, client and transparent modes
Enable Spanning Tree on ports and VLANs
Configure Spanning Tree parameters including: port priority, VLAN priority, root bridge, BPDU guard, PortFast and UplinkFast
Implement IP technology on a switched network with auxiliary VLANs
Configure and verify router redundancy using HSRP, VRRP, GLBP, SRM, and SLB
Configure QoS features on multilayer switched networks to provide optimal quality and bandwidth utilization for applications and data
Configure Fast EtherChannel and Gigabit EtherChannel to increase bandwidth for interswitch connections

Planning and Design
Compare end-to-end and local VLANs, determine when to use each
Design a VLAN configuration with VTP to work for a given specific scenario
Select multilayer switching architectures, given specific multilayer switching needs
Describe the general design models when implementing IP telephony in a switched network environment
Plan QoS implementation within a multilayer switched network

Troubleshooting
Troubleshoot common VLAN problems on a switched network
Tune and troubleshoot spanning-tree protocol on a multilayer switched network to enhance network performance, prevent network loops, and minimize downtime
Identify interVLAN routing performance and scalability issues, and propose solutions
Verify and troubleshoot interVLAN routing on a switched network
Identify QoS implementation issues at the network access layer
Identify QoS implementation issues at the network distribution and core layers

附录：
新版本的642-811变化最大，Cisco引入AVVID架构概念，IOS采用Native IOS版本，淡化CATOS；在VLAN中引入802.1Q Trunking(Q in Q) ，Spanning Tree 加入RSTP 802.1w）、 MST、CST，加入的Feature 最多，包括 BPDU Guard、BPDU Filter、Root Guard、Loop Guard等，此外增加UDLD，LACP等协议。

在三层交换机中更加细致的讲述了CEF—Based MLS，对于高可用网络加入RPR，RPR＋，IRDP，在HSRP的基础上，增加了VRRP，GLBP，SRM，SLB。对于多播部分加入了IGMPv3,还加入了Cisco IP Telephony技术。QoS是BCMSN的重点，除了传统的WFQ，PQ, CQ还引入了LLQ，CBWFQ，WRRQ以及MQC语言和NBAR Feature。

对于网络分析功能，介绍SPAN，VSPAN，RSPAN和硬件NAM的配置。安全特性除了传统的AAA外，增加了Port Security，802.1X验证，访问列表增加了VACL，RACL，还有全新技术Private Vlan，该技术满足ISP宽带服务的相关需求。

最后介绍当代高速以太网——Metro Ethernet，包括：Sonet，DWDM，CWDM，MPLSoE等新兴技术


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