在linux安装GNS3是一件让人很痛苦的事情，既然和dynagen只是表现形式上的不同，那就不重形式看内容吧，其实使用dynagen也同样灵活方便，只是要求自己比使用gns3的时候更清楚在做什么罢了。3640是我经常使用的路由器，因为其可安装交换模块，做交换机也很方便。
使用几天dynagen感觉挺好的，写点东西，以后查查也方便。
在运行dynagen之前，首先启动dynamips
要让路由器可以运行，net文件最起码填写以下内容：
在dyangen的配置模式中对路由器进行设置，也可通过配置模式查看可选用的模块。
根据以上信息，可以在net文件中添加slot内容。
如下：
重新通过dyangen启动net文件，通过show device 命令查看路由器网络模块项。
=> show device
Router R1 is running
Hardware is dynamips emulated Cisco 3640 with 96 MB RAM
Router's hypervisor runs on localhost:7200, console is on port 2000
Image is /opt/IOS/c3640-js-mz.124-10.bin with no idle-pc value
128 KB NVRAM, 0 MB disk0 size, 0 MB disk1 size
slot 1 hardware is NM-4T with 4 interfaces
Serial1/0 is empty
Serial1/1 is empty
Serial1/2 is empty
Serial1/3 is empty
slot 2 hardware is NM-16ESW with 16 interfaces
FastEthernet2/0 is empty
FastEthernet2/1 is empty
FastEthernet2/2 is empty
FastEthernet2/3 is empty
FastEthernet2/4 is empty
FastEthernet2/5 is empty
FastEthernet2/6 is empty
FastEthernet2/7 is empty
FastEthernet2/8 is empty
FastEthernet2/9 is empty
FastEthernet2/10 is empty
FastEthernet2/11 is empty
FastEthernet2/12 is empty
FastEthernet2/13 is empty
FastEthernet2/14 is empty
FastEthernet2/15 is empty
Router R2 is running
Hardware is dynamips emulated Cisco 3640 with 96 MB RAM
Router's hypervisor runs on localhost:7200, console is on port 2001
Image is /opt/IOS/c3640-js-mz.124-10.bin with no idle-pc value
128 KB NVRAM, 0 MB disk0 size, 0 MB disk1 size
slot 1 hardware is NM-4T with 4 interfaces
Serial1/0 is empty
Serial1/1 is empty
Serial1/2 is empty
Serial1/3 is empty
Router R3 is running
Hardware is dynamips emulated Cisco 3640 with 96 MB RAM
Router's hypervisor runs on localhost:7200, console is on port 2002
Image is /opt/IOS/c3640-js-mz.124-10.bin with no idle-pc value
128 KB NVRAM, 0 MB disk0 size, 0 MB disk1 size
slot 1 hardware is NM-4T with 4 interfaces
Serial1/0 is empty
Serial1/1 is empty
Serial1/2 is empty
Serial1/3 is empty
现在路由器已经有了所需要的接口，根据需要修改net文件连接路由器之间的接口。
重新通过dynagen链接net文件
查看结果：dynagen下使用命令show device
R2已经和R1的串行接口进行了连接。
现在可以进行配置各个路由器了。在dynagen中使用console命令：
好了，就说到这儿吧。
