Cisco 问题收集
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没有必要设置vtp password 但是md5一定要一样！ 我的已经成功了！ 凑巧的！ 我将c3560的mode先也设置为server，这样c4503的vlan信息自然就传过来了，这样md5就一样了；然后再将c3560的vtp mode设置为client，就可以学习到vtp server的vlan信息了！ ----------------------------------------------------------------------------- 【求助】用光纤连接3750G-24TS和 2960-24TC-L选什么样的跳线呢？
回复: 【求助】用光纤连接3750G-24TS和 2960-24TC-L选什么样的跳线呢？
------------------------------------------------------------------------------- 3500学不到4006的vlan，而3550能学到，请指教!!!
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进入不了配置模式问题
串口连接路由器 Router>en % No password set Router> 不能进入配置模式。 telnet才会出现的问题吧！ 什么问题？怎么解决？ |
看看你的con线是不是插到aux上了
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转贴】大型综合网络实验（有完全配置）
实验拓扑：  实验介绍：这是一个比较综合的实验，结合了网络和系统的一些技术。 网络方面：路由配的是OSPF多区域和RIP集成，采用了路由重分布，其中包括末梢区域，和非纯末梢区域。其中还运用了NAT负载均衡，单臂路由，交换机上运用了VLAN的划分。 系统方面：使用了微软的Active Directory，Exchange邮件系统，和Web服务 实验环境：所有拓扑图上能看见的都是虚拟设备，整个实验使用了一个真实局域网中的3台PC（每台内存1.G,CPU2.66GHz）。路由器和交换机使用的模拟软件是Dynamips，模拟的服务器用的软件是vmware。虚拟设备都桥接在真实设备上。 设备介绍：所有的路由器都是cisco 3600系列，交换机是cisco 3650. 服务器的操作系统是Windows Server 2003 Enterprise 实验说明：整个实验的路由部分配置的是OSPF多区域和RIP，包括stub区域和nssa区域，r1使用了nat，并且将内部主机vlan1（web服务器）的端口80映射为r1的s2/0的端口80，使内部的Web服务器能被外部主机访问。pc3是一台域控制器，域名为plmm.net同时也是所有外部主机的DNS服务器 pc4是plmm.net.的成员服务器，也是Exchange邮件服务器，为外部客户提供邮件服务，外部主机可以通过OWA，SMTP,POP3的方式访问Exchange. 路由交换配置： SW version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname sw ! boot-start-marker boot-end-marker ! ! memory-size iomem 5 no aaa new-model ip subnet-zero ! ! ip cef ! ! no ftp-server write-enable ! ! ! ! interface FastEthernet1/0 switchport access vlan 10 no ip address ! interface FastEthernet1/1 switchport access vlan 20 no ip address ! interface FastEthernet1/2 switchport mode trunk no ip address ! ! interface Vlan1 ip address 10.1.1.1 255.255.255.0 ! ip http server ip classless ! ! ! ! ! control-plane ! ! line con 0 transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 ! end R1 version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r1 ! boot-start-marker boot-end-marker ! ! memory-size iomem 5 no aaa new-model ip subnet-zero ! ! ip cef ! ! no ftp-server write-enable ! ! ! ! interface FastEthernet1/0 no ip address duplex auto speed auto ! interface FastEthernet1/0.10 encapsulation dot1Q 10 ip address 192.168.10.1 255.255.255.0 ip nat inside ip virtual-reassembly ! interface FastEthernet1/0.20 encapsulation dot1Q 20 ip address 192.168.20.1 255.255.255.0 ip nat inside ip virtual-reassembly ! interface Serial2/0 ip address 200.2.2.1 255.255.255.252 ip nat outside ip virtual-reassembly serial restart-delay 0 ! router rip network 200.2.2.0 ! ip http server ip classless ! ! ip nat inside source list 1 interface Serial2/0 overload ip nat inside source list 2 interface Serial2/0 overload ip nat inside source static tcp 192.168.10.10 80 200.2.2.1 80 extendable ! access-list 1 permit 192.168.10.0 0.0.0.255 access-list 2 permit 192.168.20.0 0.0.0.255 ! ! control-plane ! ! line con 0 transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 ! end R2 version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r2 ! boot-start-marker boot-end-marker ! ! memory-size iomem 5 no aaa new-model ip subnet-zero ! ! ip cef ! ! no ftp-server write-enable ! ! ! ! interface Serial1/0 ip address 100.1.1.1 255.255.255.252 serial restart-delay 0 ! ! interface Serial2/0 ip address 200.2.2.2 255.255.255.252 serial restart-delay 0 ! interface Serial3/0 ip address 100.1.1.9 255.255.255.252 serial restart-delay 0 ! interface Serial3/1 no ip address shutdown serial restart-delay 0 ! router ospf 1 log-adjacency-changes redistribute rip subnets metric 1000 network 100.1.1.0 0.0.0.255 area 0 ! router rip redistribute ospf 1 metric 3 network 200.2.2.0 ! ip http server ip classless ! ! ! ! ! control-plane ! ! line con 0 transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 ! end R3 version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r3 ! boot-start-marker boot-end-marker ! ! memory-size iomem 5 no aaa new-model ip subnet-zero ! ! ip cef ! ! no ftp-server write-enable ! ! ! ! interface Serial1/0 ip address 50.1.1.1 255.255.255.252 serial restart-delay 0 ! interface Serial2/0 ip address 100.1.1.5 255.255.255.252 serial restart-delay 0 ! interface Serial3/0 ip address 100.1.1.10 255.255.255.252 serial restart-delay 0 ! router ospf 1 log-adjacency-changes area 10 stub network 50.1.1.0 0.0.0.255 area 10 network 100.1.1.0 0.0.0.255 area 0 ! ip http server ip classless ! ! ! ! ! control-plane ! ! line con 0 transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 ! end R4 version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r4 ! boot-start-marker boot-end-marker ! ! memory-size iomem 5 no aaa new-model ip subnet-zero ! ! ip cef ! ! no ftp-server write-enable ! ! ! ! interface Serial1/0 ip address 222.2.2.5 255.255.255.252 serial restart-delay 0 ! interface Serial2/0 ip address 100.1.1.6 255.255.255.252 serial restart-delay 0 ! interface Serial3/0 ip address 100.1.1.2 255.255.255.252 serial restart-delay 0 ! router ospf 1 log-adjacency-changes network 100.1.1.0 0.0.0.255 area 0 network 222.2.2.0 0.0.0.255 area 20 ! ip http server ip classless ! ! ! ! ! control-plane ! ! line con 0 transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 ! end R5 version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r5 ! boot-start-marker boot-end-marker ! ! memory-size iomem 5 no aaa new-model ip subnet-zero ! ! ip cef ! ! no ftp-server write-enable ! ! ! ! interface Serial1/0 ip address 222.2.2.6 255.255.255.252 serial restart-delay 0 ! interface Serial1/1 ip address 88.8.8.5 255.255.255.0 serial restart-delay 0 ! interface Ethernet3/0 ip address 60.1.1.5 255.255.255.0 half-duplex ! router ospf 1 log-adjacency-changes redistribute rip metric 5000 subnets network 60.1.1.0 0.0.0.255 area 20 network 222.2.2.0 0.0.0.255 area 20 ! router rip redistribute ospf 1 metric 2 network 88.0.0.0 ! ip http server ip classless ! ! ! ! ! control-plane ! ! line con 0 transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 ! end R6 version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r6 ! boot-start-marker boot-end-marker ! ! memory-size iomem 5 no aaa new-model ip subnet-zero ! ! ip cef ! ! no ftp-server write-enable ! ! ! ! interface Serial1/0 ip address 50.1.1.2 255.255.255.252 serial restart-delay 0 ! interface Ethernet3/0 ip address 220.1.1.1 255.255.255.0 half-duplex ! router ospf 1 log-adjacency-changes area 10 stub network 50.1.1.0 0.0.0.255 area 10 network 220.1.1.0 0.0.0.255 area 10 ! ip http server ip classless ! ! ! ! ! control-plane ! ! line con 0 transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 ! end R7 version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r7 ! boot-start-marker boot-end-marker ! ! memory-size iomem 5 no aaa new-model ip subnet-zero ! ! ip cef ! ! no ftp-server write-enable ! ! ! ! interface Serial2/0 no ip address shutdown serial restart-delay 0 ! interface Serial2/1 ip address 88.8.8.7 255.255.255.0 serial restart-delay 0 ! router rip network 88.0.0.0 ! ip http server ip classless ! ! ! ! ! control-plane ! ! line con 0 transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 ! end 实验心得：整个实验用时8个小时，其中的路由配置配置花了不到1个小时，服务器的安装和搭建花了两个小时，时间用的最多的是构思，绘制拓扑图，手工编辑net文件。多于的时间用于检验服务器的性能，和排错。其实那些需要configure的的地方都不难，无非是些命令，不记得也不要紧，cisco的ios系统支持tab键和“？”实在不记得也可以查手册。真正的高手是要会show，会debug，懂原理。只有会这些才能排错。服务器里的配置在图形界面完成，就更容易了，其中也需要明白原理，会用各种工具检验服务器的网络流量，硬件性能和 |
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我在配路由器时发现了个问题，很奇怪。请那位高手指点一下。
环境：RouteA:S0:131.99.153.62 255.255.255.252;E0:154.72.40.1 255.255.252.0
PCA:IP:154.72.40.122 Gateway:154.72.40.1
RouteB:S0:131.99.153.61 255.255.255.252;E0:154.72.41.1 255.255.255.0
PCB:IP:154.72.41.122 Gateway:154.72.41.1
这个是个标准的链接方式。中间使用静态路由链接，但是发现一个奇怪现象，就是我把PCB的网关改成RouteA的局域网地址:154.72.40.1而不是RouteB的局域网地址时，居然PCB也可以正常访问PCA。请问这时什么原因，我原来一直以为这时不可能的 。因为154.72.40.1 255.255.252.0和154.72.41.1 255.255.255.0并不在一个网段内啊。
请高手指点。谢谢！！
环境：RouteA:S0:131.99.153.62 255.255.255.252;E0:154.72.40.1 255.255.252.0
PCA:IP:154.72.40.122 Gateway:154.72.40.1
RouteB:S0:131.99.153.61 255.255.255.252;E0:154.72.41.1 255.255.255.0
PCB:IP:154.72.41.122 Gateway:154.72.41.1
这个是个标准的链接方式。中间使用静态路由链接，但是发现一个奇怪现象，就是我把PCB的网关改成RouteA的局域网地址:154.72.40.1而不是RouteB的局域网地址时，居然PCB也可以正常访问PCA。请问这时什么原因，我原来一直以为这时不可能的 。因为154.72.40.1 255.255.252.0和154.72.41.1 255.255.255.0并不在一个网段内啊。
请高手指点。谢谢！！
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RouteB上有ARP代理吧。 |
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