DHCP端口设置命令剖析（dhcp使用的端口）-网络安全-知优网

文章中，我们针对DHCP端口的一些配置内容进行了讲解和介绍。希望本文所提供的代码以及命令能够给大家一些帮助。

在一些DHCP服务器的配置中，少不了端口的设置。这个也是对于路由器和交换机配置来说非常核心的问题了。用一台cisco 3560来做DHCP服务器，有时候要启多个DHCP来工作。那么我们应该怎么做呢。

DHCP端口设置命令剖析（dhcp使用的端口）端口 DHCP 第1张

首先我们要把交换端口关闭掉，换成L3的接口。配置上IP地址。再来设置DHCP地址池。我们要让端口f0/1上来的主机分配0网段的IP地址，让f0/2上来的主机分配1网段，那么，我们就应该配置好地址池后，在接口下用到ip help-address 来给客户端的查询指定一个服务地址。详细见配置。以下配置在真实3560上得到通过。

Switch#shrun首先我们看下运行中的配置清单 
Switch#shrunning-config 
Buildingconfiguration... 
Currentconfiguration:1326bytes 
! 
version12.2 
noservicepad 
servicetimestampsdebuguptime 
servicetimestampsloguptime 
noservicepassword-encryption 
! 
hostnameSwitch 
! 
! 
noaaanew-model 
systemmturouting1500 
ipsubnet-zero 
noipdomain-lookup 
! 
! 
! 
! 
! 
! 
! 
! 
! 
spanning-treemodepvst 
spanning-treeextendsystem-id 
! 
vlaninternalallocationpolicyascending 
! 
! 
! 
! 
interfaceFastEthernet0/1 
shutdown 
! 
interfaceFastEthernet0/2 
! 
interfaceFastEthernet0/3 
! 
interfaceFastEthernet0/4 
! 
interfaceFastEthernet0/5 
! 
interfaceFastEthernet0/6 
! 
interfaceFastEthernet0/7 
! 
interfaceFastEthernet0/8 
! 
interfaceFastEthernet0/9 
! 
interfaceFastEthernet0/10 
! 
interfaceFastEthernet0/11 
! 
interfaceFastEthernet0/12 
! 
interfaceFastEthernet0/13 
! 
interfaceFastEthernet0/14 
! 
interfaceFastEthernet0/15 
! 
interfaceFastEthernet0/16 
! 
interfaceFastEthernet0/17 
! 
interfaceFastEthernet0/18 
! 
interfaceFastEthernet0/19 
! 
interfaceFastEthernet0/20 
! 
interfaceFastEthernet0/21 
! 
interfaceFastEthernet0/22 
! 
interfaceFastEthernet0/23 
noswitchport 
ipaddress192.168.100.1255.255.255.0 
! 
interfaceFastEthernet0/24 
! 
interfaceGigabitEthernet0/1 
! 
interfaceGigabitEthernet0/2 
! 
interfaceVlan1 
noipaddress 
! 
ipclassless 
iphttpserver 
iphttpsecure-server 
! 
! 
! 
control-plane 
! 
! 
linecon0 
linevty04 
login 
linevty515 
login 
! 
end

#p#

Switch#conft 
Switch(config)#intfa0/1进入F0/1 
Switch(config-if)#noswitchport关闭L2端口 
Switch(config-if)#ipadd10.0.0.1255.255.255.0配置IP地址 
Switch(config-if)#nosh打开端口 
Switch(config-if)#exi 
Switch(config)#intfa0/2 
Switch(config-if)#nosw 
Switch(config-if)#noswitchport 
Switch(config-if)#nosh 
Switch(config-if)#ipadd10.0.1.1255.255.255.0 
Switch(config-if)#nosh 
Switch(config-if)#exi 
Switch(config)#ipdhcppoolccna设置DHCP组 
Switch(dhcp-config)#network10.0.0.0255.255.255.0地址池 
Switch(dhcp-config)#default-router10.0.0.254缺省路由（网关） 
Switch(dhcp-config)#dns-server202.103.24.68DNS地址设置 
Switch(dhcp-config)#lease365地址租期 
Switch(dhcp-config)#exi 
Switch(config)#ipdhcppoolccnp 
Switch(dhcp-config)#network10.0.1.0255.255.255.0 
Switch(dhcp-config)#default-router10.0.1.254 
Switch(dhcp-config)#dns-server202.103.24.68 
Switch(dhcp-config)#lease365 
Switch(dhcp-config)#exi 
Switch(config)#ipdhcpexcluded-address10.0.0.1不参与分配的地址 
Switch(config)#ipdhcpexcluded-address10.0.0.254 
Switch(config)#ipdhcpexcluded-address10.0.1.254 
Switch(config)#ipdhcpexcluded-address10.0.1.1 
Switch(config)#exi 
Switch(config)#intfa0/1 
Switch(config-if)#iphelper-address10.0.0.1指定帮助地址，它将默认转发给8个UDP服务 
Switch(config-if)#exi 
Switch(config)#intfa0/2 
Switch(config-if)#iphelper-address10.0.1.1 
Switch(config-if)#exi 
Switch#shrun 
Switch#shrunning-config 
Buildingconfiguration...

#p#

Currentconfiguration:1864bytes 
! 
version12.2 
noservicepad 
servicetimestampsdebuguptime 
servicetimestampsloguptime 
noservicepassword-encryption 
! 
hostnameSwitch 
! 
! 
noaaanew-model 
systemmturouting1500 
ipsubnet-zero 
noipdomain-lookup 
ipdhcpexcluded-address10.0.0.1 
ipdhcpexcluded-address10.0.0.254 
ipdhcpexcluded-address10.0.1.254 
ipdhcpexcluded-address10.0.1.1 
! 
ipdhcppoolccna 
network10.0.0.0255.255.255.0 
default-router10.0.0.254 
dns-server202.103.24.68 
lease365 
! 
ipdhcppoolccnp 
network10.0.1.0255.255.255.0 
default-router10.0.1.254 
dns-server202.103.24.68 
lease365 
! 
! 
! 
! 
! 
! 
! 
! 
! 
spanning-treemodepvst 
spanning-treeextendsystem-id 
! 
vlaninternalallocationpolicyascending 
! 
! 
! 
! 
interfaceFastEthernet0/1 
noswitchport 
ipaddress10.0.0.1255.255.255.0 
iphelper-address10.0.0.1 
! 
interfaceFastEthernet0/2 
noswitchport 
ipaddress10.0.1.1255.255.255.0 
iphelper-address10.0.1.1 
! 
interfaceFastEthernet0/3 
! 
interfaceFastEthernet0/4 
! 
interfaceFastEthernet0/5 
! 
interfaceFastEthernet0/6 
! 
interfaceFastEthernet0/7 
! 
interfaceFastEthernet0/8 
! 
interfaceFastEthernet0/9 
! 
interfaceFastEthernet0/10 
! 
interfaceFastEthernet0/11 
! 
interfaceFastEthernet0/12 
! 
interfaceFastEthernet0/13 
! 
interfaceFastEthernet0/14 
! 
interfaceFastEthernet0/15 
! 
interfaceFastEthernet0/16 
! 
interfaceFastEthernet0/17 
! 
interfaceFastEthernet0/18 
! 
interfaceFastEthernet0/19 
! 
interfaceFastEthernet0/20 
! 
interfaceFastEthernet0/21 
! 
interfaceFastEthernet0/22 
! 
interfaceFastEthernet0/23 
noswitchport 
ipaddress192.168.100.1255.255.255.0 
! 
interfaceFastEthernet0/24 
! 
 
Switch#sharp 
ProtocolAddressAge(min)HardwareAddrTypeInterface 
Internet10.0.0.20001a.4b58.42a9ARPAFastEthernet0/1 
Internet10.0.1.1-001e.4a0a.2042ARPAFastEthernet0/2 
Internet10.0.0.1-001e.4a0a.2041ARPAFastEthernet0/1 
Internet192.168.100.1-001e.4a0a.2043ARPAFastEthernet0/23