R3204P16-HP Load Balancing Module Network Management Configuration Guide-6PW101

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DNS Proxy configuration example
1. Network requirements
As shown in Figure 128,
specify LB A as the DNS server of LB B (the DNS client). LB A acts as a DNS
proxy. The IP address of the real DNS server is 4.1.1.1.
LB B implements domain name resolution through LB A.
Figure 128 Network diagram for DNS proxy
2. Configuration procedure
NOTE:
Before performing the following configuration, assume that LB A, the DNS server, and the host are
reachable to each other and the IP addresses of the interfaces are configured as shown in Figure 128.
a. Configure the DNS server
This configuration may vary with different DNS servers. When a Windows server 2000 PC acts as the
DNS server, see “Dynamic domain name resolution configuration example” f
or related configuration
information.
b. Configure the DNS proxy
# S p e c i f y t h e D N S s e r v e r 4 .1.1.1.
<LB A> system-view
[LB A] dns server 4.1.1.1
# Enable DNS proxy.
[LB A] dns proxy enable
c. Configure the DNS client
# Enable the domain name resolution function.
<LB B> system-view
[LB B] dns resolve
# Specify the DNS server 2.1.1.2.
[LB B] dns server 2.1.1.2
d. Configuration verification
# Execute the ping host.com command on LB B to verify that the communication between LB B and the
host is normal and that the corresponding destination IP address is 3.1.1.1.
DNS proxy
(LB A)
DNS server
DNS client
(LB B)
IP network
Host
2.1.1.2/24
1.1.1.1/24
2.1.1.1/24
4.1.1.1/24
3.1.1.1/24
Host.com