1.通过操作交换机搭建一个基本的小型局域网

2.改善IOS操作方式的快捷键

3.初步认识IP这个鬼东西

TCP/IP协议栈

封装和解封装（穿衣服和脱衣服）了解、理解、掌握、精通、研究应用工程师1.通过操作交换机搭建一个基本的小型局域网，类似网管傻瓜交换机(VLAN1)！--->中型局域网SW1#show vlan brief //验证VLAN的简要信息

SW1(config-vlan)#name QYT //vlan1作为默认VLAN，不可以修改

%Default VLAN 1 may not have its name changed.设备是空配，为什么存在VLAN10、20之类？思科设备上，VLAN信息可能保存在不同的位置真机把vlan信息保存在flash卡的vlan.dat这个文件中学会使用帮助命令，你就半只脚入门了。大家学会打问号完全帮助和部分帮助SW1#clock set 20:19?hh:mm:ss //命令格式，也称之为关键字

SW1#clock set 20:19 ?

% Unrecognized command，为什么不识别呢？

SW1#clock set 20:22:30 April 16

% Incomplete command.

SW1#clock set 20:22:30 April 16 2018 ?

<cr> //代表回车~执行

SW1(config)#clock timezone BJ +8 //设置时区为BK +8

保存：

Branch#copy running-config startup-config //等于wr，把正在运行的文件保存到非易失性寄存器（nvram）去

Destination filename [startup-config]?

Building configuration...

[OK]

思科路由器设备上配置保存在nvram；中低端的交换机配置保存在flash（dir）--->在不破坏原有配置的情况下，破解交换机的密码

Branch#reload //重启命令

快捷键--->手速

tab //补全命令

ctrl+a //光标到行首

ctrl+e //光标到行末

ctrl+U //擦除一行

ctrl+shift+6 //中断测试，比如ping

ctrl+c //不执行命令，退出到特权模式

ctrl+z //执行完毕命令，退出到特权模式

Branch#terminal length 0 //显示所有配置

管道符|,比较精准的定位配置和显示

sh run | section

securecrt中的log功能，文件->日志文件

操作：

×××的光纤:单模、多模？利用vlan1实现终端的通信PC1：PC1(config)#int e0/1 PC1(config-if)#ip addPC1(config-if)#ip address 10.1.10.1 ?A.B.C.D IP subnet mask

PC1(config-if)#ip address 10.1.10.1 255.255.255.248

PC1(config-if)#no shuPC2：PC2(config)#int e0/1PC2(config-if)#no shuPC2(config-if)#ip address 10.1.10.6 255.255.255.248PC2#show ip route //验证路由表Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2ia - IS-IS inter area, * - candidate default, U - per-user static routeo - ODR, P - periodic downloaded static route, H - NHRP, l - LISPa - application route

• • replicated route, % - next hop override

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

C 10.1.10.0/29 is directly connected, Ethernet0/1

L 10.1.10.6/32 is directly connected, Ethernet0/1PC1#show ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2ia - IS-IS inter area, * - candidate default, U - per-user static routeo - ODR, P - periodic downloaded static route, H - NHRP, l - LISPa - application route

• • replicated route, % - next hop override

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

C 10.1.10.0/29 is directly connected, Ethernet0/1

L 10.1.10.1/32 is directly connected, Ethernet0/1PC1#ping 10.1.10.6Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 10.1.10.6, timeout is 2 seconds:.!!!!Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 msPC1#如果没有恢复sw1和sw2的配置，PC1和PC2不能通信

PC2(config)#line vty 0 4

PC2(config-line)#password qytPC2(config-line)#transport input telnet

PC2(config)#enable secret ?

0 Specifies an UNENCRYPTED password will follow5 Specifies a MD5 HASHED secret will follow8 Specifies a PBKDF2 HASHED secret will follow9 Specifies a SCRYPT HASHED secret will followLINE The UNENCRYPTED (cleartext) 'enable' secretlevel Set exec level password

PC2(config)#enable secret qytang123 //secret级别高于password，secret密码生效

PC2(config)#enable password qytang

PC2#terminal monitor //在远程管理的终端上显示日志

PC2#conf tEnter configuration commands, one per line. End with CNTL/Z.PC2(config)#hostname PC-TESTPC-TEST(config)#PC-TEST#*Apr 15 10:15:11.661: %SYS-5-CONFIG_I: Configured from console by vty0 (10.1.10.1) //通过日志更多的来了解配置的变化，以及配置是否生效作业：1）通过2个交换机的VLAN1实现PC1和PC2通信（用我配置的地址）2）PC2上配置secret密码3）远程管理时，显示日志