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	文章列表 - CCIE

	思科CCNP考试变动，感叹搭上幸福末班车
	<DIV>刚考完CCNP-CIT（642－831）的考试没多久就看到论坛里面有人说CCNP的考试要发生大变化了，开始我以为只是升级题库而已，因为之前经常这样搞，后来才知道新版的CCNP考试不仅考试号上面发生了变化（将原来BSCI的考试号642－801调整为642－901；将原来BCMSN的考试号642－811调整为642－812），而且取消远程（BCRAN）跟排错（CIT）两门考试，取而代之为ISCW（Implementing Secure Converged Wide-Area Networks，对应考试号为642－825）和ONT（Optimizing Converged Cisco Networks，对应考试号为642－845）两门考试，看来安全跟语音已经提升到战略高度了<IMG src="http://www.cublog.cn/images/face/003.gif"></DIV> <DIV>还好自己刚好把NP的考试给考完，不然这样一来就大乱阵脚了。但是其他很多正在准备NP考试的人怎么办呢？难道把手中原本已经准备好的远程、排错资料给扔了，调头重新复习ISCW跟ONT？不知道了，希望所有人都顺利吧<IMG src="http://www.cublog.cn/images/face/001.gif"></DIV> <DIV>今天打开电子邮箱收到思科发来的邮件，我还以为是恭喜我顺利通过NP考试来着，结果证实有关考试变化的消息。下面就是思科发来的邮件，里面有有关考试变动的详细消息：</DIV> <DIV> <TABLE style="FONT-SIZE: 13px; FONT-FAMILY: Arial, Helvetica, sans-serif; tr: " cellSpacing=0 cellPadding=0 width=640 bgColor=#ffffff border=0 valign="top"> <TBODY> <TR vAlign=top align=left> <TD align=left> <P> </P> <TR> <TD> <TABLE style="FONT-SIZE: 13px; FONT-FAMILY: Arial, Helvetica, sans-serif; tr: " cellSpacing=0 cellPadding=0 width=640 bgColor=#ffffff border=0 valign="top"> <TBODY> <TR vAlign=top align=left> <TD align=left>Dear Yu Lei, <BR><BR><B>Cisco Announces CCNP Certification Updates</B><BR>Cisco® announces comprehensive updates to its premier CCNP® professional-level networking certification. The new program provides networking professionals with the knowledge and skills required to deploy and maintain fully integrated network infrastructure services and applications. <BR><BR><B>Integrated Networking Expertise in Demand</B><BR>The new CCNP program maintains its focus on the advanced skills required to manage the routers and switches that form the network core, but also expands to include techniques to deploy and support wireless, voice, and security applications on the network edge. Network professionals who achieve the new CCNP certification will demonstrate the skills and knowledge required to fully utilize Cisco intermediate session routing (ISR) routers, which provide wire-speed delivery of concurrent data, voice, video, and wireless services applications. By passing the exam, you will also demonstrate the expertise necessary to integrate and manage converged networks, quality of service (QoS), and virtual private networks (VPNs). <BR><BR><B>CCNP Certification Curriculum</B><BR>Four recommended training courses and four required exams comprise the new CCNP certification curriculum. A valid CCNA® certification is a prerequisite for taking the CCNP exams. <BR><BR> <TR> <TD> <TABLE style="FONT-SIZE: 13px; FONT-FAMILY: Arial, Helvetica, sans-serif" width=630 border=1> <TBODY> <TR vAlign=top align=left> <TD width=330><B>New Required Exams as of August 15, 2005</B></TD> <TD width=300><B>Exam Topics</B></TD></TR> <TR vAlign=top align=left> <TD>642-901 BSCI<BR>Building Scalable Cisco Inter-networks</TD> <TD>ISR routers, updates to Cisco IOS®<BR>Software 12.4 routing protocol, routing authentication security, multicast routing, IPv6</TD></TR> <TR vAlign=top align=left> <TD>642-812 BCMSN<BR>Building Cisco Multilayer Switched Networks </TD> <TD>High availability, new wireless LAN fundamentals for Airespace thin-client, voice, and Cisco IOS switch security</TD></TR> <TR vAlign=top align=left> <TD>642-825 ISCW<BR>Implementing Secure Converged Wide-Area Networks </TD> <TD>Cable and DSL broadband access, Multiprotocol Label Switching (MPLS)/MPLS VPN fundamentals Cisco IOS Security featuring S2S VPN (IPsec and generic routing encapsulation/IPsec [GRE/IPSEC]), Cisco Easy VPN, Cisco IOS Firewall, Cisco IOS Intrusion Prevention System (IPS), Cisco AutoSecure, Role-Based CLI Access, and Cisco Security Device Manager (SDM)</TD></TR> <TR vAlign=top align=left> <TD>642-845 ONT<BR>Optimizing Converged Cisco Networks </TD> <TD>Voice over IP (VoIP) fundamentals, techniques to address VoIP challenges, concepts and implementation methods for quality of service (QoS), wireless security standards, and Cisco wireless LAN (WLAN) networks</TD></TR></TBODY></TABLE></TD></TR> <TR vAlign=top align=left> <TD align=left><BR><B>Previous Exams Count for Three Years Towards Completion of CCNP Certification</B><BR>Visit the <A href="http://sdm3.rm04.net/ctt?kn=9&m=588470&r=NDExMzQxMzY1NgS2&b=0&j=MjAyMzY4ODkS1&mt=1" target=_blank name="Certifications Online Support tool"><FONT color=#0000ff>Certifications Online Support tool</FONT></A> and locate the mix and match tables to find out how you can combine exams that you may have already taken with the new exams to achieve your CCNP professional-level certification. All recommended training associated with the retiring exams will expire on October 15, 2006. The last day to test for the retiring exams will be December 31, 2006. <BR><BR> <TR> <TD> <TABLE style="FONT-SIZE: 13px; FONT-FAMILY: Arial, Helvetica, sans-serif" width=630 border=1> <TBODY> <TR vAlign=top align=left> <TD width=130><B>Course</B></TD> <TD width=150><B>Course Retirement</B></TD> <TD width=120><B>Current Exams</B></TD> <TD width=230><B>Current Exams: Last Day to Test</B></TD></TR> <TR vAlign=top align=left> <TD><B>BSCI</B></TD> <TD>October 15, 2006</TD> <TD>642-801</TD> <TD>December 31, 2006</TD></TR> <TR vAlign=top align=left> <TD><B>BCMSN</B></TD> <TD>October 15, 2006</TD> <TD>642-811</TD> <TD>December 31, 2006</TD></TR> <TR vAlign=top align=left> <TD><B>BCRAN</B></TD> <TD>October 15, 2006</TD> <TD>642-521</TD> <TD>December 31, 2006</TD></TR> <TR vAlign=top align=left> <TD><B>CIT</B></TD> <TD>October 15, 2006</TD> <TD>642-511</TD> <TD>December 31, 2006</TD></TR></TBODY></TABLE></TD></TR> <TR vAlign=top align=left> <TD align=left><BR><B>New CCNP Prep Center</B><BR>To assist networking professionals who are preparing for the CCNP exam, the <A href="http://sdm3.rm04.net/ctt?kn=4&m=588470&r=NDExMzQxMzY1NgS2&b=0&j=MjAyMzY4ODkS1&mt=1" target=_blank name="CCNP Prep Center"><FONT color=#0000ff>CCNP Prep Center</FONT></A> is now live. Open to Cisco Certification candidates and those who are already certified, the CCNP Prep Center provides CCNP certification candidates access to a wide variety of resources, including practice questions, labs, simulations, tips, expert advice, success stories, and peer discussion forums. The CCNP Prep Center also allows networking professionals to easily access information and formal training from Cisco Learning Solutions Partners. <BR><BR><B>Updates to CCIP and CCDP Certification Programs</B><BR>Cisco’s CCIP™ and CCDP® professional-level certification programs have also been updated to include the newly revised Building Scalable Cisco Inter-networks (<U>BSCI</U>) exam and recommended training. Network professionals pursuing CCIP and CCDP certifications will benefit from these curriculum updates, which provide the up-to-date knowledge required to install, support, and optimize ISR routers using Cisco IOS 12.4 routing protocol, routing authentication security, multicast routing, and IPv6. <BR><BR><B>For More Information</B><BR>Visit the Certifications home page for more information on CCNP, CCIP, and CCDP programs as well as all certifications offered by Cisco. For instant answers to your certification questions, visit the <A href="http://sdm3.rm04.net/ctt?kn=9&m=588470&r=NDExMzQxMzY1NgS2&b=0&j=MjAyMzY4ODkS1&mt=1" target=_blank name="Certifications Online Support tool"><FONT color=#0000ff>Certifications Online Support tool</FONT></A>.<BR></TD></TR></TBODY></TABLE></TD></TR> <TR vAlign=top align=left> <TD align=left><BR> <TR> <TD></TD></TR> <TR vAlign=top align=left> <TD align=left><BR></TD></TR></TBODY></TABLE></DIV> <DIV> </DIV> <DIV></DIV> <DIV></DIV>
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	发表于:2006-08-16 ┆ 阅读(930) ┆ 评论(0)

	Part3:Static Routing
	<DIV>The Route Table<BR>Configuring Static Routes<BR>    Case Study: Simple Static Routes<BR>    Case Study: Summary Routes<BR>    Case Study: Alternative Routes<BR>    Case Study: Static Floating Routes<BR>    Case Study: Load Sharing<BR>    Case Study: Recursive Table Lookups<BR>Troubleshooting Static Routes<BR>    Case Study: Tracing a Failed Route<BR>    Case Study: A Protocol Conflict</DIV> <DIV> </DIV> <DIV>The router will match the most specific address it can. In descending order of specificity, the address may be one of the following:<BR>A host address<BR>A subnet <BR>A group of subnets <BR>A major network number<BR>A group of major network numbers<BR>A default address</DIV> <DIV> </DIV> <DIV>The procedure for statically routing an internetwork has three steps:<BR>1, For each data link within the internetwork, identify all addresses(subnet or network)<BR>2, For each router, identify all data links not directly connected to that router<BR>3, For each router, write a route statement for each data link not directly connected to it</DIV> <DIV> </DIV> <DIV>By summarizing a group of subnets or even major networks, the number of static route entries may be reduced drastically. However, caution must be used when summarizing addresses; when done incorrectly, unexpected routing behavior may occur.</DIV> <DIV> </DIV> <DIV>The administrative distances of all dynamic routing protocols are substantially higher than 1. Therefore, by default a static route to a network will always be prefered over a dynamically discovered route to the same network.</DIV> <DIV> </DIV> <DIV>Per destination load balancing distributes the load according to destination address. Given two paths to the same network, all packets for one destination on the network may travel over the first path, all packets for a second destination on the same ne……
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	发表于:2006-08-15 ┆ 阅读(629) ┆ 评论(0)

	Part2:TCP/IP Review
	<DIV>The TCP/IP Protocol Layers<BR>The IP Packet Header<BR>IP Addresses<BR>ARP<BR>ICMP<BR>The Host-to-Host Layer</DIV> <DIV> </DIV> <DIV>Header Length is a four-bit field that tells, as the name implies, the length of the IP header. The reason this field is included is that the Options field(described later in this section) can vary in size. The minimum length of the IP header is 20 octets, and the options may increase this size up to a maximum of 24 octets. This field describes the length of the header in terms of 32-bit words-five for the minimum 160-bit size and six for the maximum</DIV> <DIV> </DIV> <DIV>The DF bit can be used in troubleshooting to determine a path's MTU</DIV> <DIV>Flags is a three-bit field in which the first bit is unused. The second is the Don't Fragment(DF) bit. When the DF bit is set to one, a router cannot fragment the packet. If the packet cannot be forwarded without fragmenting, the router drops the packet and sends an error message to the source. This function enables the testing of MTUs in an internetwork. The DF bit can be set using the Extended Ping utility on Cisco router.</DIV> <DIV> </DIV> <DIV>An important distinction to remember when working with IP addresses is that dotted decimal is just an easy way for humans to read and write IP addresses. Always remember that the router is not reading an address in terms of four octets; rather, the router sees a 32-bit binary string. Many pitfalls can be avoided by keeping this fact firmly in mind</DIV> <DIV> </DIV> <DIV>So far IP addressing doesn't seem so difficult. A router or host could easily determine the network part of an IP address by using the first octet rule. If the first bit is 0,then read the first eight bits to find the network address. If the first two bits are 10, then read the first 16 bits; and if the first three bits are 110, then read 24 bits in to get the network address. </DIV> <DIV> </DIV> <DIV>Unfortunately, things are not that ea……
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	发表于:2006-08-15 ┆ 阅读(592) ┆ 评论(0)

	Part1 Basic Concepts:Internetworks,Routers,address
	<DIV>Bicycles with moters<BR>Data link addresses<BR>Repeaters and bridges<BR>Routers<BR>Network addresses</DIV> <DIV> </DIV> <DIV>So far, a LAN has been defined as being a community of devices such as PCs, printers, and servers coexisting on a common communications medium and following a comon protocol that regulates how they access the medium. But there is one last requirement: As in any community, each individual must be uniquely identifiable.</DIV> <DIV> </DIV> <DIV>Attenuation, interference, and distortion prevent a signal from arriving in the same shape it was in when it left. Attenuation is a function of the resistance of the wire. A centain amount of signal energy must be spent"pushing past" the resistance. Interference is a function of outside influences noise which adds characteristics to the signal that should not be there. Distortion is a function of the wire impeding different frequency components of the signal in different ways.</DIV> <DIV> </DIV> <DIV>Routers have been known by several names. Back in ancient times when what is now the Internet was called the ARPANET, routers were called IMPs, for interface message processors. More recently, routers were called gateways; remnants of this nomenclature can still be found in terms such as Border gateway protocol(BGP) and Interior Gateway Routing Protocol(IGRP). In the open system interconnection(OSI) world, routers are known as Intermediate Systems(IS)</DIV> <DIV> </DIV> <DIV>The communication path between two devices sharing a common data link is a physical path, the communication path provided by routers between two devices on different network is a higher-level, logical path</DIV> <DIV> </DIV> <DIV>The digital envelope used by routers is a packet</DIV> <DIV><BR> </DIV> <DIV></DIV> <DIV></DIV>
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	发表于:2006-08-14 ┆ 阅读(639) ┆ 评论(0)

	2006.8.13 正式开始CCIE学习之旅
	<DIV>经过一年的拉锯战，总算是和CCNP的学习say goodbye了，BSCI/BCMSN/BCRAN/CIT，就像四个陆续前来拜访的朋友，每个人都在我的脑海里驻留一段时间，给我留下难以忘却的印象，然后握手再见。</DIV> <DIV>当初考CCNP泡论坛的时候，隔三差五的就看到“XX年XX月XX日 NPed”这样的帖子，心中真是无限憧憬，觉得那是多么光荣的一件事情啊，就像大学毕业的时候全班同学将手中的学士帽抛向空中时的无比轻快。当自己也把类似那样的一篇帖子写完然后提交的时候，心里面却沉甸甸的，因为自己并不甘心只是一个NP，我还想把IE也给考下来，这个念头似乎是当初决定学习CCNA的时候就有了的。一年下来，意志还是那样坚定，不容易啊～</DIV> <DIV>花了整整一个晚上的时间搜集了CCIE一些相关的情况，发现要看的书真是很多啊，涉及到的知识点也很全面：路由、交换、WAN、IOS features、IP组播、QoS、安全、IPv6，每个部分的英文文档都有一千多页，综合起来据说得有两万多页，想想就觉得恐怖，不过再一想如果自己每本书都仔细的研究完了，那也是挺荣耀的一件事情，于是战斗力又起来了。</DIV> <DIV>又花了一个多两个小时四处搜集所需资料，到最后还差两本书的电子档，一本是“IP组播网络设计开发(第一卷)”，一本是“Implementing Cisco IPv6 Networks”，论坛上、CISCO官网上都找了也没有找到，只是在一些网站上看到有中文版的“IP组播网络设计开发（第一卷）”卖，要价38RMB。价格倒是挺公道，但是我不想看中文版的，考NP的时候就深有感触，像这样的考试，最好还是看原汁原味的英文版那才带劲，中文版有很多地方翻译出来看着都挺别扭，理解起来也挺难懂的，误人子弟不说，价格还挺高的。家里有一本CCNP四合一中文版，考BSCI的时候翻了翻后来就再也没有看过，现在估计灰尘都快要跟书差不多厚了，还花了我85RMB，想想真是不值得。还有“Implementing Cisco IPv6 Networks”也没有找到，在论坛上发了帖子询问，等两天再说吧，先把前面的电子文档看看再说。</DIV> <DIV>决定了从今天开始CCIE的学习，这就得好好规划一下学习时间，上班时间是铁定不能看的了，那么只有下班再看，再把周末的时间给算上，一个星期好像也有五、六十个小时的节余时间。不管了，先就这样试运行吧，看看效果再说。</DIV> <DIV> </DIV> <DIV></DIV> <DIV></DIV> <DIV></DIV>
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	发表于:2006-08-13 ┆ 阅读(697) ┆ 评论(0)

	CCIE Routing & Switching备考指南2006版（转载）
	<DIV>转载请注明作者信息:<BR>作者:红头发(CCIE#15101)<BR>出处:<A href="http://www.91lab.com/" target=_blank><FONT color=#800080>http://www.91lab.com</FONT></A><BR>QQ:13030130<BR><BR>--------------------------------------------------------------------------------<BR><BR><FONT color=blue>一.IP Routing部分:</FONT><BR>1.<Routing TCP/IP,Volume I>:<BR>这本书是讲IGP的经典书籍,只是实验所需求的设备太多,但是它上面的case却是超好.这本书是必看bible!<BR><BR>2.<Cisco OSPF Command and Configuration Handbook>:<BR>这本书用来做OSPF的分解实验,OSPF是CCIE Lab考试中IGP的一个大头.这本书以最少的设备需求满足了最大的实验环境.1个字赞!<BR><BR>3.<Internet Routing Architectures,2nd edition>或<Routing TCP/IP,Volume II>:<BR>前者是Halabi写的,BGP的理论讲的很经典,命令和配置方面有所欠缺.也可以选择看Jeff的<Routing TCP/IP,Volume II>,我本人喜欢看cisco.com上关于BGP的文档.<BR><BR>4.<Cisco BGP-4 Command and Configuration Handbook>:<BR>这本书用来做BGP的分解实验,BGP是CCIE Lab考试中EGP的一个大头.这本书以最少的设备需求满足了最大的实验环境.再赞1个!<BR><BR>5.OSPF和BGP都搞定之后,还有别的像RIPv2,EIGRP,IS-IS等路由协议,这类协议的分解实验,去cisco.com上查文档,标题诸如<Cisco IOS IP Command Reference,Volume 2 of 3: Routing Protocols Release 12.2>.里面把每种考试涉及到的路由协议的命令全讲解一遍.自己构思拓扑,把每条命令都搞熟练,不要放过任何一条,CCIE Lab考试很BT的!<BR><BR><BR><FONT color=blue>二.LAN Switching部分:</FONT><BR>1.<Cisco LAN Switching>:<BR>此书号称经典的105(因为定价是105块)这本书是LAN交换中的bible,不过内容老了点,但是大家应该知道如何去选择性的阅读吧?set命集时间不充裕的话就可以跳过不看.i bet,如果你真pass了CCIE Lab考试,以后工作中肯定会遇见CatOS的.因此建议各位还是查查doc,熟悉下set命令集.2006年将发行此书的第二版,不知道和第一版的有何区别.<BR><BR>2.<Catalyst 3550 Multilayer Switch Software Configuration Guide>:<BR>这个文档去cisco.com上查,近1000页的英文文档,对英文能力实在是个考验.考试嘛,以3550为主,实验方面看这个软件配置手册就OK了.这个软件手册还包括了很多后面要讲的,比如IP组……
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	发表于:2006-08-13 ┆ 阅读(760) ┆ 评论(0)

	CCIE ROUTING AND SWITCHING TRACK Lab Exam Blueprin
	<DIV>1,Bridging and Switching<BR>a. Frame Relay<BR>b. Catalyst configuration:VLANS, VTP, STP, trunk, management, features, advanced configuration, Layer 3<BR>2,IP IGP Routing<BR>a. OSPF<BR>b. EIGRP<BR>c. RIPv2<BR>d. IPv6<BR>e. GRE<BR>f. ODR<BR>g. Filtering, redistribution, summarization and other advanced features<BR>3,BGP<BR>a. IBGP<BR>b. EBGP<BR>c. Filtering, redistribution, summarization, synchronization, attributes and other acvanced features<BR>4,IP and IOS Features<BR>a. IP addressing<BR>b. DHCP<BR>c. HSRP<BR>d. IP services<BR>e. IOS user interfaces<BR>f. System management<BR>g. NAT<BR>h. NTP<BR>i. SNMP<BR>j. RMON<BR>k. Accounting<BR>5,IP Multicast<BR>a. PIM, bi-directional PIM<BR>b. MSDP<BR>c. Multicast tools, source specific multicast<BR>d. DVMRP<BR>e. Anycast<BR>6,QoS<BR>a. Quality of service solutions<BR>b. Classification<BR>c. Congestion management, congestion avoidance<BR>d. Policing and shaping<BR>e. Signaling<BR>f. Link efficiency mechanisms<BR>g. Modular QoS command line<BR>7,Security<BR>a. AAA<BR>b. Security server protocols<BR>c. Traffic filtering and firewalls<BR>d. Access lists<BR>e. Routing protocols security, catalyst security<BR>f. Other security features<BR></DIV> <DIV></DIV>
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	发表于:2006-08-06 ┆ 阅读(708) ┆ 评论(0)

	CCIE ROUTING AND SWITCHING TRACK Written Exam Blue
	<DIV>The Routing and Switching written exam(#350-001) has 100 multiple-choice questions and two hours in duration. The topic areas listed are general guidelines for the type of content that is likely to appear on the exam. Please note, however, that other relevant or related topic areas may also appear.<BR>1,General Networking Theory<BR>a. OSI Models<BR>b. General Routing Concepts<BR>c. Standards<BR>d. Protocol Mechanics<BR>e. Commands<BR>2,Bridging and LAN Switching<BR>a. Transparent<BR>b. LAN Switching<BR>c. MLS<BR>d. Data link Layer<BR>e. Ethernet<BR>f. Catalyst IOS configuration commands<BR>3,IP<BR>a, Addressing<BR>b. Services<BR>c. Applications<BR>d. Transport<BR>e. IPv6<BR>f. Network Management<BR>4,IP Routing<BR>a. OSPF<BR>b. BGP<BR>c. EIGRP<BR>d. Route filtering and Policy Routing<BR>e. RIPv2<BR>f. The use of 'show' and 'debug' commands<BR>5,QoS<BR>a. Traffic classfiction<BR>b. Congestion management<BR>c. Congestion avoidance<BR>6,WAN<BR>a. Frame Relay<BR>b. Physical layer<BR>c. Leased Line Protocols<BR>7,IP Multicast<BR>a. IGMP/CGMP<BR>b. Addressing<BR>c. Distribution Trees<BR>d. PIM-SM Mechanics<BR>e. Rendezvous Points<BR>f. RPF<BR>8,Security<BR>a. Access Lists<BR>b. LAN security<BR>c. Device security/access<BR>d. Spoofing<BR>9,Enterprise Wireless Mobility<BR>a. Standards<BR>b. Hardware<BR>c. SWAN<BR>d. RF Troubleshooting<BR>e. VoWLAN<BR>f. Products<BR></DIV> <DIV></DIV> <DIV></DIV>
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	发表于:2006-08-06 ┆ 阅读(742) ┆ 评论(0)

	含着热泪看完的一篇CCIE写的文章(转载)
	为尊重作者,此篇转自WOLF的论坛
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	发表于:2005-05-12 ┆ 阅读(1424) ┆ 评论(1)