Configuration procedure

Configure Switch A:

# Specify the IP address of VLAN-interface 2.

<SwitchA> system-view
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] ip address 10.1.1.1 24
[SwitchA-Vlan-interface2] quit

# Enable the DHCP service.

[SwitchA] dhcp enable

# Exclude an IP address from automatic allocation.

[SwitchA] dhcp server forbidden-ip 10.1.1.2

# Configure DHCP address pool 0 and specify the subnet, lease duration, DNS server address, and a static route to subnet 20.1.1.0/24.

[SwitchA] dhcp server ip-pool 0
[SwitchA-dhcp-pool-0] network 10.1.1.0 mask 255.255.255.0
[SwitchA-dhcp-pool-0] expired day 10
[SwitchA-dhcp-pool-0] dns-list 20.1.1.1
[SwitchA-dhcp-pool-0] option 121 hex 18 14 01 01 0A 01 01 02

Enable the DHCP client on VLAN-interface 2 of Switch B.

<SwitchB> system-view
[SwitchB] interface vlan-interface 2
[SwitchB-Vlan-interface2] ip address dhcp-alloc