实验2:通过Telnet访问Cisco路由器 实验2:通过Telnet访问Cisco路由器 一,实验拓扑 二,实验步骤 (1)配置路由器 Router>enable //进入路由器特权模式 Router#conf t //进入路由器配置模式 Enter configuration commands, one per line. End with CNTL/Z. Router(config)#int f0/0 //进入路由器的以太网f0/0接口 Router(config-if)#ip add 192.168.1.1 255.255.255.0 //配置F0/0接口IP地址 Router(config-if)#no sh //激活接口,路由接口默认是关闭的 %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up Router(config-if)#exit Router(config)#line vty 0 4 //进入路由器的 VTY 虚拟终端下, “vty 0 4”
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示vty 0 到vty 4,共5 个虚拟终端 Router(config-line)#password cisco Router(config-line)#login //以上是配置 vty 的密码CISCO,即 telnet 密码 Router(config-line)#exit Router(config)#enable password cisco Router(config)#end //以上是配置进入到路由器特权模式的密码 (2)配置telnet PC PC要配置IP地址,否则telnet不上的 进入CMD PC>telnet 192.168.1.1 Trying 192.168.1.1 ...Open User Access Verification Password: //输入telnet密码Router>en Password: //输入进入特权模式密码 Router#conf t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#exit Router#sh int f0/0 FastEthernet0/0 is up, line protocol is up (connected) Hardware is Lance, address is 0004.9a71.4901 (bia 0004.9a71.4901) Internet address is 192.168.1.1/24 MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set ARP type: ARPA, ARP Timeout 04:00:00, Last input 00:00:08, output 00:00:05, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0 (size/max/drops); Total output drops: 0 Queueing strategy: fifo Output queue :0/40 (size/max) 5 minute input rate 52 bits/sec, 0 packets/sec 5 minute output rate 50 bits/sec, 0 packets/sec 185 packets input, 7558 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 input packets with dribble condition detected 157 packets output, 6673 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out 注 :如果无法从计算机上 ping 通路由器,依照以下步骤进行 (1) 检查计算机、交换机、路由器之间的连接是否松动; (2) 检查连接线应该是否是直通线; (3) 检查计算机的网卡和 IP地址是否正常; (4) 在路由器上,检查以太网接口是否正常