S21交换机dhcp中继配置方法

配置DHCP Relay Agent

缺省的DHCP Relay Agent设置

项目	缺省值
DHCP Relay Agent状态	Disable,关闭DHCP服务
DHCP Server的IP地址	255.255.255.255

打开DHCP Relay Agent

步骤:
Switch# configure terminal
!进入全局配置模式
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# service dhcp
!打开DHCP服务,这里指打开DHCP Relay Agent
2006-03-16 09:27:39  @5-CONFIG:Configured from outband
Switch(config)# end
!退回到特权模式
2006-03-16 09:27:40  @5-CONFIG:Configured from outband
Switch# show running-config
!显示当前配置
System software version : 1.63 Build Jan  6 2006 Rel

Building configuration...
Current configuration : 371 bytes

!
version 1.0
!
no enable services web-server
hostname Switch
vlan 1
!
enable secret level 1 5 &t;C,tZ[qu<D+S(\rv=G1X)ss:>H.Y*T
enable secret level 15 5 &t,1u_;Cqu-8U0<Drv.tj9=Gs+/7R:>H
!
service dhcp
interface vlan 1
no shutdown
ip address 192.168.26.38 255.255.255.0
!
ip default-gateway 192.168.26.10
snmp-server community public ro
end

Switch# write
!保存配置
Building configuration...
[OK]

配置DHCP Server的IP地址

步骤:
Switch# configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# ip helper-address 192.168.26.47
!设置DHCP Server的IP地址
2006-03-16 09:40:02  @5-CONFIG:Configured from outband
Switch(config)# end
2006-03-16 09:40:05  @5-CONFIG:Configured from outband
Switch# show running-config

System software version : 1.63 Build Jan  6 2006 Rel

Building configuration...
Current configuration : 406 bytes

!
version 1.0
!
no enable services web-server
hostname Switch
vlan 1
!
enable secret level 1 5 &t,1u_;Cqu-8U0<Drv.tj9=Gs+/7R:>H
enable secret level 15 5 &t-aeh`@qu'dfimLrv{bcknAs7zyglow
!
service dhcp
ip helper-address 192.168.26.47
interface vlan 1
no shutdown
ip address 192.168.26.38 255.255.255.0
!
ip default-gateway 192.168.26.10
snmp-server community public ro
end

Switch# write
Building configuration...
[OK]

注:如果要把DHCP Server的IP地址恢复到缺省值,可以用no ip helper-address全局配置命令来设置,

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