H3C Technologies H3C S5560 Series Switches - Manual (Page 111)

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# Specify the DNS server 2.1.1.2.
system-view
[Sysname] dns server 2.1.1.2
# Specify com as the name suffix.
[Sysname] dns domain com
Verifying the configuration
# Use the ping host command on the device to verify that the communication between the device and the
host is normal and that the translated destination IP address is 3.1.1.1.
[Sysname] ping host
Ping host.com (3.1.1.1): 56 data bytes, press CTRL_C to break
56 bytes from 3.1.1.1: icmp_seq=0 ttl=255 time=1.000 ms
56 bytes from 3.1.1.1: icmp_seq=1 ttl=255 time=1.000 ms
56 bytes from 3.1.1.1: icmp_seq=2 ttl=255 time=1.000 ms
56 bytes from 3.1.1.1: icmp_seq=3 ttl=255 time=1.000 ms
56 bytes from 3.1.1.1: icmp_seq=4 ttl=255 time=2.000 ms
--- Ping statistics for host ---
5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss
round-trip min/avg/max/std-dev = 1.000/1.200/2.000/0.400 ms
DNS proxy configuration example
Network requirements
When the IP address of the DNS server changes, you must configure the new IPv6 address of the DNS
server on each device on the LAN. To simplify network management, you can use the DNS proxy
function.
As shown in
Figure 38 :
• Specify Device A as the DNS server of Device B (the DNS client). Device A acts as a DNS proxy.
The IPv6 address of the real DNS server is 4.1.1.1.
• Configure the IP address of the DNS proxy on Device B. DNS requests of Device B are forwarded
to the real DNS server through the DNS proxy.