华为CE交换机-配置DHCPv4中继

2026年 4月 9日交换机 SE_YT

配置DHCPv4中继

背景信息

如图1所示，DHCPv4服务器与DHCPv4客户端不在同一网段，用户希望通过配置DHCPv4中继使DHCPv4客户端动态获取IPv4地址。

图1 配置DHCPv4中继组网图

本例中interface1和interface2分别代表100GE1/0/1和100GE1/0/2。

华为CE交换机-配置DHCPv4中继

操作步骤

配置设备间的网络互连

# 配置DeviceA。

<HUAWEI> system-view
[~HUAWEI] sysname DeviceA
[*HUAWEI] commit
[~DeviceA] vlan batch 100 200
[*DeviceA] interface 100ge 1/0/1
[*DeviceA-100GE1/0/1] portswitch
[*DeviceA-100GE1/0/1] port link-type hybrid
[*DeviceA-100GE1/0/1] port hybrid pvid vlan 200
[*DeviceA-100GE1/0/1] port hybrid untagged vlan 200
[*DeviceA-100GE1/0/1] quit
[*DeviceA] interface 100ge 1/0/2
[*DeviceA-100GE1/0/2] portswitch
[*DeviceA-100GE1/0/2] port link-type hybrid
[*DeviceA-100GE1/0/2] port hybrid pvid vlan 100
[*DeviceA-100GE1/0/2] port hybrid untagged vlan 100
[*DeviceA-100GE1/0/2] quit
[*DeviceA] interface vlanif 200
[*DeviceA-Vlanif200] ip address 10.10.20.1 24
[*DeviceA-Vlanif200] quit
[*DeviceA] commit

# 配置DeviceB。

<HUAWEI> system-view
[~HUAWEI] sysname DeviceB
[*HUAWEI] commit
[~DeviceB] vlan batch 200
[*DeviceB] interface 100ge 1/0/1
[*DeviceB-100GE1/0/1] portswitch
[*DeviceB-100GE1/0/1] port link-type hybrid
[*DeviceB-100GE1/0/1] port hybrid pvid vlan 200
[*DeviceB-100GE1/0/1] port hybrid untagged vlan 200
[*DeviceB-100GE1/0/1] quit
[*DeviceB] interface vlanif 200
[*DeviceB-Vlanif200] ip address 10.10.20.2 24
[*DeviceB-Vlanif200] quit
[*DeviceB] commit

配置DHCPv4中继。

# 在DeviceA的接口VLANIF100下使能DHCPv4中继功能，并配置DHCPv4服务器的IPv4地址。

[~DeviceA] dhcp enable
[*DeviceA] interface vlanif 100
[*DeviceA-Vlanif100] ip address 10.20.20.1 24
[*DeviceA-Vlanif100] dhcp select relay 
[*DeviceA-Vlanif100] dhcp relay server-ip 10.10.20.2
[*DeviceA-Vlanif100] quit
[*DeviceA] commit

配置DHCPv4服务器。

# 在DeviceB上配置基于全局地址池的DHCPv4服务器功能。

[~DeviceB] dhcp enable
[*DeviceB] interface vlanif 200
[*DeviceB-Vlanif200] dhcp select global
[*DeviceB-Vlanif200] quit
[*DeviceB] ip pool pool1
[*DeviceB-ip-pool-pool1] network 10.20.20.0 mask 24
[*DeviceB-ip-pool-pool1] gateway-list 10.20.20.1
[*DeviceB-ip-pool-pool1] option121 ip-address 10.10.20.0 24 10.20.20.1
[*DeviceB-ip-pool-pool1] quit
[*DeviceB] commit

配置路由。

# 在DeviceA上配置缺省路由。

[~DeviceA] ip route-static 0.0.0.0 0.0.0.0 10.10.20.2
[*DeviceA] commit

# 在DeviceB上配置静态路由。

[~DeviceB] ip route-static 10.20.20.0 255.255.255.0 10.10.20.1
[*DeviceB] commit

检查配置结果

# 在DeviceA上执行命令display dhcp relay interface vlanif 100命令用来查看DHCPv4中继的配置信息。

[~DeviceA] display dhcp relay interface vlanif 100
 Server IP address [00] : 10.10.20.2                                                                                                
 Gateway address in use : 10.20.20.1                                                                                                
 Gateway switch         : Disable

# 在DHCPv4客户端上查看IPv4地址信息，可以看到已经成功获取到IPv4地址。

配置脚本

DeviceA的配置文件

#
sysname DeviceA
#
vlan batch 100 200
#
dhcp enable
#
interface Vlanif100
 ip address 10.20.20.1 255.255.255.0
 dhcp select relay
 dhcp relay server-ip 10.10.20.2
#
interface Vlanif200
 ip address 10.10.20.1 255.255.255.0
#
interface 100GE1/0/1
 port link-type hybrid
 port hybrid pvid vlan 200
 port hybrid untagged vlan 200
#
interface 100GE1/0/2
 port link-type hybrid
 port hybrid pvid vlan 100
 port hybrid untagged vlan 100
#
ip route-static 0.0.0.0 0.0.0.0 10.10.20.2
#
return

DeviceB的配置文件

#
sysname DeviceB
#
vlan batch 200
#
dhcp enable
#
ip pool pool1
 gateway-list 10.20.20.1
 network 10.20.20.0 mask 255.255.255.0
 option121 ip-address 10.10.20.0 24 10.20.20.1
#
interface Vlanif200
 ip address 10.10.20.2 255.255.255.0
 dhcp select global
#
interface 100GE1/0/1
 port link-type hybrid
 port hybrid pvid vlan 200
 port hybrid untagged vlan 200
#
ip route-static 10.20.20.0 255.255.255.0 10.10.20.1
#
return

作者：SE_YT

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