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Posts Tagged ‘ospf’

 

    Passive-interface 将一个接口指定为被动接口！然而这个命令在RIP和OSPF/EIGRP中却有不同的表现。

 

    下面我们通过实验来解析一下这个命令。

实验所用的TOP还是上一篇日志用到的TOP。IP规划也同上面一样。
上一篇日志的地址为：（CCNP 642-902 Distribute-list in the RIP.）http://yangbo.name/archives/1155.html

因为本站是的VPS是在国外的，且支持IPv6访问。如果你在拥有IPv6接入我建议你使用IPv6方式访问，一个是免费、二个是IPv6的出国速度也比IPv4较快一点点（教育网）。

 

Passive-interface of RIP

Passive-interface of EIGRP

Passive-interface of OSPF

 总结

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Exam Description

Troubleshooting and Maintaining Cisco IP Switched Networks (TSHOOT 642-832) is a qualifying exam for the Cisco Certified Network Professional CCNP®, certification. The TSHOOT 642-832  exam will certify that the successful candidate has important knowledge and skills necessary to (1) plan and perform regular maintenance on complex enterprise routed and switched networks and (2) use technology-based practices and a systematic ITIL-compliant approach to perform network troubleshooting.

Exam Topics

The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.

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Exam Description

The Implementing Cisco IP Routing (ROUTE 642-902) is a qualifying exam for the Cisco Certified Network Professional CCNP®, Cisco Certified Internetwork Professional CCIP®, and Cisco Certified Design Professional CCDP® certifications. The ROUTE 642-902 exam will certify that the successful candidate has the knowledge and skills necessary to use advanced IP addressing and routing in implementing scalable and secure Cisco ISR routers connected to LANs and WANs.  The exam also covers configuration of secure routing solutions to support branch offices and mobile workers.

Exam Topics

The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.

Implement an EIGRP based solution, given a network design and a set of requirements

• Determine network resources needed for implementing EIGRP on a network
• Create an EIGRP implementation plan
• Create an EIGRP verification plan
• Configure EIGRP routing
• Verify EIGRP solution was implemented properly using show and debug commands
• Document results of EIGRP implementation and verification

Implement a multi-area OSPF Network, given a network design and a set of requirements

• Determine network resources needed for implementing OSPF on a network
• Create an OSPF implementation plan
• Create an OSPF verification plan
• Configure OSPF routing
• Verify OSPF solution was implemented properly using show and debug commands
• Document results of OSPF implementation and verification plan

Implement an eBGP based solution, given a network design and a set of requirements

• Determine network resources needed for implementing eBGP on a network
• Create an eBGP implementation plan
• Create an eBGP verification plan
• Configure eBGP routing
• Verify eBGP solution was implemented properly using show and debug commands
• Document results of eBGP implementation and verification plan

Implement an IPv6 based solution, given a network design and a set of requirements

• Determine network resources needed for implementing IPv6 on a network
• Create an IPv6 implementation plan
• Create an IPv6 verification plan
• Configure IPv6 routing
• Configure IPv6 interoperation with IPv4
• Verify IPv6 solution was implemented properly using show and debug commands
• Document results of IPv6 implementation and verification plan

Implement an IPv4 or IPv6 based redistribution solution, given a network design and a set of requirements

• Create a redistribution implementation plan based upon the results of the redistribution analysis
• Create a redistribution verification plan
• Configure a redistribution solution
• Verify that a redistribution was implemented
• Document results of a redistribution implementation and verification plan
• Identify the differences between implementing an IPv4 and IPv6 redistribution solution

Implement Layer 3 Path Control Solution

• Create a Layer 3 path control implementation plan based upon the results of the redistribution analysis
• Create a Layer 3 path control verification plan
• Configure Layer 3 path control
• Verify that a Layer 3 path control  was implemented
• Document results of a Layer 3 path control implementation and verification plan
• Implement basic teleworker and branch services
• Describe broadband technologies
• Configure basic broadband connections
• Describe basic VPN technologies
• Configure GRE
• Describe branch access technologies

近来的一次工程中本来是计划在出口站做 OSPF的LSA过滤。 结果因为H3C的操作系统目前不支持LSA级过滤。所以只有起多个OSPF进程、起多个区域，再做路由引入。但在这引入过程中，需要过滤某些路由条目，使其不被引入到另一端。

(子节点1）——–（子节点中心）———总中心

在子节点网络中，使用OSPF路由协议，进程号为13，区域号也为13。  在子节点中心与总中心之间使用OSPF路由协议，进程号为3，区域号为0。   需要将ospf 13的路由信息引入到ospf 3中去。 所以子节点中心 就运行了OSPF13和OSPF3。创建一个高级ACL，并将此ACL与Route-policy关联起，  然后在路由引入时加上Route-policy。

配置方式：

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根据RFC标注说明   OSPF分组长度占用2字节位。且该字段表示的是OSPF分组的长度。我想问一下 这个OSPF分组的起始位。

 

 

 

从抓包可以看到  这个包的OSPF分组长度为32.    可以数出来为40字节。