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Posts Tagged ‘CISCO’

注意：阅读和运行本文档需要基本的Linux基础！！

 

 

　　　　本来我的原意不是做一个路由和交换同时运行的NETMAP。但是在Andlinux下不能开启30台交换机，说以就将TS1的脚本修改了一下！

在Andlinux下用CD切换到TS1-sw目录下！运行start3即可

 

[root@andLinux TS1-sw]# pwd
/home/yangbo/windows/l2iou/TS1-sw
[root@andLinux TS1-sw]# ./start3

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    This guide provides explanations to a script called iou2net.pl (script is at the end of the article), which allows you to attach IOU instances to real network (interfaces). In its functionality, its similar to what the ioulive tool does. For more information about IOU or ioulive, ask your Cisco SE/AM that provided you with your copy of IOU, or check out the IOU FAQ from evilrouters.net.

    Why another script that does nearly the same thing as ioulive? While playing around with IOU, i tried to come up with a way to attach IOU instances to dynamips directly. I managed to get this working for single instances, but came to the conclusion that its best to integrate such functionality in dynagen directly. Unfortunately, Im not a good programmer and have no experience with python, nor the time to dig through the dynagen sources and extend the code. This script is a byproduct of this work, where i tried to document the packet format that IOU uses to communicate between instances. For now, the script allows to attach to real network adapters and tap interfaces, and to communicate through UDP "links" as known from dynamips and qemu.

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原因如下：

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ip default-network、ip route、ip default-gateway的区别

在cisco的16448文档中详细地讲解了这三条命令的使用条件和区别。

一、使用条件
ip default-gateway在禁用了ip routing的情况下使用，该路由器被当做默认网关。
ip default-network和ip route 0.0.0.0 0.0.0.0 则可以在启用路由选择协议下使用。

二、区别
ip default-network 与 ip route 0.0.0.0 0.0.0.0 的最大区别在于前者可以被路由选择协议宣告出去。
但是由于ip default-network这条命令是有类的，如果宣告的网络不是主类网，将不会被标记成*号。

ip default-network产生的默认路由是可以被EIGRP和RIP宣告的，但不被OSPF宣告，至于OSPF怎么产生默认路由，上一边有介绍。值得注意的是，RIP宣告ip default-network的路由条目是，使用0.0.0.0，可以debug ip rip看到。

ip route 0.0.0.0 0.0.0.0 也可以被EIRGP传播，但是这条静态路由必须重分发到EIGRP协议中；在12.0T以后的IOS版本中，RIP将不宣告默认路由，除非是通过RIP学习到得，或者重分发到RIP中。
同样，在OSPF中也不能传播该命令产生的默认路由，（default-information originate命令）

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    今天冲网上得到了IOU的L2版本。

 

 

因为我的环境比较特殊。

我以前的IOU使用的环境是Vmware+Centos5.4。

当然现在有更好的环境就是AndLinux。可是我玩不懂这个。所以还是只有在Centos 的环境下去运行IOUL2了。

 

可是一运行就提示我的License有错。

IOU License Error: invalid license
License for key 7f03b7 required on host "CDlinux".
Obtain a license for this key and host from the following location: 

http://wwwin-enged.cisco.com/ios/iou/license/index.html

Place in your iourc file as follows (see also the web page
for further details on iourc file format and location) 

[license]
CDlinux = <16 char license>;
IOU 3328 exit

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实验内容

Frame relay
Catalyst交换机配置:
VLANs, VTP, STP, MSTP, RSTP, Trunk, Etherchannel, management, features, advanced configuration, Layer 3 Tunneling
IP IGP Routing
OSPF
EIGRP
RIPv2
IPv6: Addressing, RIPng, OSPFv3
GRE
ODR
Filtering, redistribution, summarization and other advanced features
BGP
IBGP
EBGP

 

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今天群里在讨论这么一个拓扑图。

图中共有4个路由器：
R1、R2、R4（上面的3个路由器处于Eigrp AS100中。
R1、R3、R4（下面的3个路由器处于Eigrp AS200中。

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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

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本实验是书上的例子。
要达到的目的是：

1.有5台路由器。R3只运行OSPF。R1和R2运行BGP和OSPF.
2.R1有一个到R5的EBGP对等体，一个到R2的IBGP对等体。
3.R2有一个到R4的EBGP对等体，一个到R1的IBGP对等体。
4.确保R1的15个环回（131.108.2.0-131.108.16.0）能够路由到R5，而且R5可以修改所有偶数网络，设置本地权重为1000，设置距离（MED）为100。所有的奇数网络，设置本地权重为2000，设置距离（MED）为200。
5.确保R1广播一条默认路由到R5，R2广播一条默认路由到R4。使用前缀列表来完成。
6.确保R4不会接受131.108.0.0范围内的网络，只接受默认路由。R4必须拒接所有其他网络。
7.确保R3可以使用OSPF路由到所用的网络。

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