H3C Technologies H3C S7500E Series Switches - Manual (Page 100)

9-10
Configuration procedure
Before performing the following configuration, assume that Switch 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 9-8 .
1) Configure the DNS server
This configuration may vary with different DNS servers. When a Windows server 2000 PC acts as the
DNS server, refer to Dynamic Domain Name Resolution Configuration Example for related
configuration information.
2) Configure the DNS proxy
# Specify the DNS server 4.1.1.1.
<SwitchA> system-view
[SwitchA] dns server 4.1.1.1
# Enable DNS proxy.
[SwitchA] dns proxy enable
3) Configure the DNS client
# Enable the domain name resolution function.
<SwitchB> system-view
[SwitchB] dns resolve
# Specify the DNS server 2.1.1.2.
[SwitchB] dns server 2.1.1.2
4) Configuration verification
# Execute the ping host.com command on Switch B to verify that the communication between the
Switch and the host is normal and that the corresponding destination IP address is 3.1.1.1.
[SwitchB] ping host.com
Trying DNS resolve, press CTRL_C to break
Trying DNS server (2.1.1.2)
PING host.com (3.1.1.1):
56 data bytes, press CTRL_C to break
Reply from 3.1.1.1: bytes=56 Sequence=1 ttl=126 time=3 ms
Reply from 3.1.1.1: bytes=56 Sequence=2 ttl=126 time=1 ms
Reply from 3.1.1.1: bytes=56 Sequence=3 ttl=126 time=1 ms
Reply from 3.1.1.1: bytes=56 Sequence=4 ttl=126 time=1 ms
Reply from 3.1.1.1: bytes=56 Sequence=5 ttl=126 time=1 ms
--- host.com ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 1/1/3 ms