Configuration procedure

Configure IP addresses for interfaces.

<LB> system-view
[LB] interface gigabitethernet 1/0/1
[LB-GigabitEthernet1/0/1] ip address 192.168.1.100 24
[LB-GigabitEthernet1/0/1] quit
[LB] interface gigabitethernet 1/0/2
[LB-GigabitEthernet1/0/2] ip address 10.1.1.1 24
[LB-GigabitEthernet1/0/2] quit
[LB] interface gigabitethernet 1/0/3
[LB-GigabitEthernet1/0/3] ip address 20.1.1.1 24
[LB-GigabitEthernet1/0/3] quit

Configure links:

# Create the link link1 with next hop address 10.1.1.2.

[LB] loadbalance link link1
[LB-lb-link-link1] router ip 10.1.1.2
[LB-lb-link-link1] quit

# Create the link link2 with next hop address 20.1.1.2.

[LB] loadbalance link link2
[LB-lb-link-link2] router ip 20.1.1.2
[LB-lb-link-link2] quit

Create a DNS server pool named dsp.

[LB] loadbalance dns-server-pool dsp
[LB-lb-dspool-dsp] quit

Configure DNS servers:

# Create a DNS server named ds1, configure its IP address as 10.1.2.100, assign it to DNS server pool dsp, and associate it with link link1.

[LB] loadbalance dns-server ds1
[LB-lb-ds-ds1] ip address 10.1.2.100
[LB-lb-ds-ds1] dns-server-pool dsp
[LB-lb-ds-ds1] link link1
[LB-lb-ds-ds1] quit

# Create a DNS server named ds2, configure its IP address as 20.1.2.100, assign it to DNS server pool dsp, and associate it with link link2.

[LB] loadbalance dns-server ds2
[LB-lb-ds-ds2] ip address 20.1.2.100
[LB-lb-ds-ds2] dns-server-pool dsp
[LB-lb-ds-ds2] link link2
[LB-lb-ds-ds2] quit

Configure a transparent DNS proxy:

# Create a UDP transparent DNS proxy named dns-proxy1, configure its IP address as 0.0.0.0, specify DNS server pool dsp as its default DNS server pool, and enable the transparent DNS proxy.

[LB] loadbalance dns-proxy dns-proxy1 type udp
[LB-lb-dp-udp-dp] ip address 0.0.0.0 0 
[LB-lb-dp-udp-dp] default dns-server-pool dsp
[LB-lb-dp-udp-dp] service enable
[LB-lb-dp-udp-dp] quit