Switch> 
Switch>enable 
Switch#conf t 
Enter configuration commands, one per line. End with CNTL/Z. 
Switch(config)#host 3550 
3550(config)#no ip do lo 
3550(config)#line con 0 
3550(config-line)#no exec-t 
3550(config-line)#logg syn 
3550(config-line)#exit 

3550(config)#vlan 100 
//給VLAN100命名 
3550(config-vlan)#name renshibo 
3550(config-vlan)#int f0/13 
3550(config-if)#switchport mode access 
3550(config-if)#switchport access vlan 100 
3550(config-if)#spanning-tree portfast 
//請問什么時候需要在交換機接口下配置portfast？這里如果不配置可以嗎？ 
%Warning: portfast should only be enabled on ports connected to a single 
host. Connecting hubs, concentrators, switches, bridges, etc... to this 
interface when portfast is enabled, can cause temporary bridging loops. 
Use with CAUTION 
%Portfast has been configured on FastEthernet0/13 but will only 
have effect when the interface is in a non-trunking mode. 
3550(config-if)#vlan 200 
3550(config-vlan)#name shichangbo 
3550(config-vlan)#int f0/15 
3550(config-if)#sw mo acc 
3550(config-if)#sw acc vlan 200 
3550(config-if)#spanning-tree portfast 
%Warning: portfast should only be enabled on ports connected to a single 
host. Connecting hubs, concentrators, switches, bridges, etc... to this 
interface when portfast is enabled, can cause temporary bridging loops. 
Use with CAUTION 
%Portfast has been configured on FastEthernet0/15 but will only 
have effect when the interface is in a non-trunking mode. 
//驗證VLAN的配置 
3550#show vlan brief 
VLAN Name Status Ports 
---- -------------------------------- --------- ------------------------------- 
1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 
Fa0/5, Fa0/6, Fa0/7, Fa0/8 
Fa0/9, Fa0/10, Fa0/11, Fa0/12 
Fa0/14, Fa0/16, Fa0/17, Fa0/18 
Fa0/23, Gi0/1, Gi0/2 
100 renshibo active Fa0/13 
200 shichangbo active Fa0/15 
1002 fddi-default act/unsup 
1003 token-ring-default act/unsup 
1004 fddinet-default act/unsup 
1005 trnet-default act/unsup 

3550#conf t 
Enter configuration commands, one per line. End with CNTL/Z. 
//進入VLAN 100 虛擬接口下 
3550(config)#int vlan 100 
//增加接口描述，以便將來排錯更加方便 
3550(config-if)#description Connection to renshibo 
//這里配置的IP地址就是人事部PC的默認網關地址，如果VLAN接口不配置IP地址，后面的DHCP配置中，PC能否獲得IP地址嗎？？ 
3550(config-if)#ip add 192.168.0.1 255.255.255.0 
3550(config-if)#no sh 
3550(config-if)#int vlan 200 
00:13:22: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan200, changed state to up 
3550(config-if)#description Connection to shichangbo 
3550(config-if)#ip add 172.16.0.1 255.255.255.0 
3550(config-if)#no sh 
3550(config-if)# 
3550#conf t 
//開啟catalyst 3550三層交換路由功能（默認是關閉的） 
請問cisco catalyst那些型號交換機是三層交換機？ 
3550(config)#ip routing 
3550(config)#exit 
3550#sh ip route 
//兩條直連路由條目 
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP 
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP 
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 
ia - IS-IS inter area, * - candidate default, U - per-user static route 
o - ODR, P - periodic downloaded static route 
Gateway of last resort is not set 
172.16.0.0/24 is subnetted, 1 subnets 
C 172.16.0.0 is directly connected, Vlan200 
C 192.168.0.0/24 is directly connected, Vlan100 
Designated bridge has priority 32768, address ccd1.0a80.0000 
Designated port id is 129.65, designated path cost 0 
Timers: message age 0, forward delay 0, hold 0 
Number of transitions to forwarding state: 1 
BPDU: sent 993, received 92 

//全局下打開DHCP服務.默認是開啟的嗎？那為什么還要需要開啟了？ 
3550(config)#service dhcp 
//關閉dhcp 客戶端IP沖突日志記錄信息 
3550(config)#no ip dhcp conflict logging 
//配置地址池名稱，地址池名稱為任意字符（這里定義的名字VLAN的名稱） 
3550(config)#ip dhcp pool renshibo 
//配置PC所獲得網段地址范圍，和掩碼，（這里有幾種命令語句格式） 
(network 192.168.0.0 255.255.255.0) 
3550(dhcp-config)#network 192.168.0.0 /24 
//配置網關地址 
3550(dhcp-config)#default-router 192.168.0.1 
//配置DNS（域名解析服務器）可選配置 
請問什么時候PC需要配置DNS地址？局域網通訊需要嗎？ 
3550(dhcp-config)#dns 218.30.19.40 61.134.1.4 
//配置域名 
3550(dhcp-config)#domain-name www.cisco.com 
//配置地址租期為永久 
3550(dhcp-config)#lease infinite 
3550(dhcp-config)#exit 
//配置排除的IP地址范圍，不從地址池內分配的地址，不配置排除地址可以嗎？ 
3550(config)#ip dhcp excluded-address 192.168.0.1 
3550(config)#ip dhcp pool shichangbo 
3550(dhcp-config)#network 172.16.0.0 /24 
3550(dhcp-config)#default-router 172.16.0.1 
3550(dhcp-config)#dns 218.30.19.40 61.134.1.4 
3550(dhcp-config)#domain-name www.cisco.com 
3550(dhcp-config)#lease infinite 
3550(dhcp-config)#exit 
3550(config)#ip dhcp excluded-address 172.16.0.1 

//查看DHCP綁定信息 
3550#sh ip dhcp binding 
IP address Client-ID/ （MAC地址） Lease expiration Type 
Hardware address 
172.16.0.2 0100.16d3.249f.fd Infinite Automatic 
192.168.0.2 0100.1641.15e8.5c Infinite Automatic 

3550(config)#exit 
3550# 
00:26:41: %SYS-5-CONFIG_I: Configured from console by console 
3550#ping 172.16.0.2 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 172.16.0.2, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms 
3550#ping 192.168.0.2 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 192.168.0.2, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms