Cisco switch turns on DHCP service

Source: Internet
Author: User
Tags cisco switch


The topology diagram is as follows:

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Description of the above equipment use:

1, using R1 to do DHCP server

2, use R2 and R3 instead of computer to do DHCP client

3, SW1 used as a fool switch.


DHCP server configuration (R1 configuration):

r1#disable############ #使用  disable  Command exit privileged mode r1>r1>enable ############ #使用  enable  command to enter privileged mode    r1#show privilege current privilege level is 15####### ##### #查看特权模式的级别 #############  into configuration mode r1#configure terminal enter configuration commands ,  one per line.  end with cntl/z.r1 (config) #exit ############ #查看接口状态R1 #show  ip interface briefInterface                   IP-Address      OK? Method  status                 protocolfastethernet0/0            unassigned       YES unset  administratively down down     fastethernet0/1            unassigned       yes unset  administratively down down    serial1/0                    Unassigned      yes unset  administratively down down     Serial1/1                   unassigned      YES unset   administratively down down    serial1/2                   unassigned       yes unset  administratively down down    serial1/3                   unassigned       YES unset  administratively down down    R1#configure  Terminal enter configuration commands, one per line.  end with  cntl/z.############ #进入接口进行配置R1 (config) #int  fastethernet 0/0r1 (config-if) #no  shutdown  R1 (config-if) #*aug  1 19:39:28.523: %link-3-updown: interface  fastethernet0/0, changed state to up*aug  1 19:39:29.523: % lineproto-5-updown: line protocol on interface fastethernet0/0, changed  STATE TO UPR1 (config-if) #ip  address 123.1.1.1 255.255.255.0r1 (config-if) #R1 (config-if ) ############# #在配置模式中查看接口状态需要加  do  prefix R1 (config-if) #do  show ip interface  briefinterface                  ip-address       OK? Method Status                 ProtocolFastEthernet0/0             123.1.1.1       YES manual up                     up       FastEthernet0/1             unassigned      YES unset  administratively down  down    serial1/0                   unassigned      YES unset   Administratively down down    serial1/1                   unassigned      YES unset   administratively down down    Serial1/2                   unassigned       YES unset  administratively down down     serial1/3                   unassigned      yes unset  administratively down  DOWN    R1 (config-if) ############# #也可使用  end  Command exit configuration mode R1 (config-if) #endR1 #r1 #*aug  1 19:43:17.991: %sys-5-config_i: configured from console by  consoler1#r1#configure terminal enter configuration commands, one per line.  end with  cntl/z.############ #开启dhcp  server  function R1 (config) #service  dhcpr1 (config) #ip  dhcp pool  R123R1 (dhcp-config) #network  123.1.1.0 255.255.255.0############ #将客户端的网关指向  dhcp  server  interface IPR1 (dhcp-config) #default-router 123.1.1.1############ #将客户端的DNS指向  dhcp server   Interface IPR1 (dhcp-config) #dns-server 123.1.1.1############ #设置租期为1天0时1分R1 (dhcp-config) #lease  1  0 1############ #配置域名为cisco. comR1 (dhcp-config) #domain-name cisco.comr1 (dhcp-config) #



DHCP client configuration (R2 and R3 configuration):

r2#configure terminal enter configuration commands, one per line.   end with cntl/z.############ #禁用ip  routing routing forwarding, simulating the router to PcR2 (config) #no  ip  Routing r2 (config) #int  fastethernet 0/0 r2 (config-if) #no  shutdownr2 (config-if) #*Aug   1 19:07:41.279: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed  State to up*aug  1 19:07:42.279: %lineproto-5-updown: line protocol  on interface fastethernet0/0, changed state to up############ #开启dhcp动态获取R2 (config-if) #ip  address dhcpr2 (config-if) #*aug  1 19:11:47.891: %dhcp-6-address_ Assign: interface fastethernet0/0 assigned dhcp address 123.1.1.2, mask  255.255.255.0, HOSTNAME R2R2 (config-if) #end ############ #查看接口状态R2 #show ip interface  briefinterface  &Nbsp;               ip-address       OK? Method Status                 ProtocolFastEthernet0/0             123.1.1.2       yes dhcp    up                     up      FastEthernet0/1             unassigned      yes unset   administratively down down    Serial1/0                   unassigned       yes unset  administratively down down    serial1/1                   unassigned       YES unset  administratively down down     serial1/2                   unassigned      yes unset  administratively down  down    Serial1/3                   unassigned      YES unset   administratively down down    r2############# #查看单独接口状态R2 #show  Running-config interface fastethernet 0/0building configuration ... Current configuration : 94 bytes!interfacE fastethernet0/0 ip address dhcp no ip route-cache duplex auto  speed autoend





This article is from the "Gan mu" blog, please be sure to keep this source http://ganmu.blog.51cto.com/9305511/1952781

Cisco switch turns on DHCP service

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