Table of Contents

1 DNS Configuration Guide· 1-1

Static Domain Name Resolution Configuration Guide· 1-1

Network Diagram·· 1-1

Networking and Configuration Requirements· 1-1

Applicable Product Matrix· 1-1

Configuration Procedure· 1-1

Complete Configuration· 1-2

Precautions· 1-2

Dynamic Domain Name Resolution Configuration Guide· 1-2

Network Diagram·· 1-2

Networking and Configuration Requirements· 1-2

Applicable Product Matrix· 1-3

Configuration Procedure· 1-3

Complete Configuration· 1-3

Precautions· 1-4

 

Static Domain Name Resolution Configuration Guide

Static domain name resolution is based on manually configured domain name-to-IP address mappings. If you telnet a remote device using its name, the local device will look up the corresponding IP address in the static domain name resolution table.

Network Diagram

Figure 1-1 Network diagram for static domain name resolution configuration

 

Networking and Configuration Requirements

As shown in the above figure, the switch can use static domain name resolution to access host 10.1.1.2 through domain name host.com.

Applicable Product Matrix

Product series	Software version	Hardware version
S5600 series Ethernet switches	Release 1510, Release 1602	All versions
S5100-SI/EI series Ethernet switches	Release 2200, Release 2201	All versions
S3600-SI/EI series Ethernet switches	Release 1510, Release 1602	All versions
S3100-EI series Ethernet switches	Release 2104, Release 2107	All versions
S3100-C-SI series Ethernet switches S3100-T-SI series Ethernet switches	Release 0011, Release 2102, Release 2107	All versions
S3100-TP-SI series Ethernet switches	Release 2102, Release 2107	All versions( except S3100-52TP-SI)
S3100-52TP-SI	Release 2106, Release 2107	S3100-52TP-SI
S3100-52P	Release 1500, Release 1602	S3100-52P

 

Configuration Procedure

# Map host name host.com to IP address 10.1.1.2.

<Switch> system-view

[Switch] ip host host.com 10.1.1.2

# Execute the ping host.com command to verify that Switch can get the IP address 10.1.1.2 of name host.com.

[Switch] ping host.com

  PING host.com (10.1.1.2): 56  data bytes, press CTRL_C to break

    Reply from 10.1.1.2: bytes=56 Sequence=1 ttl=127 time=3 ms

    Reply from 10.1.1.2: bytes=56 Sequence=2 ttl=127 time=3 ms

    Reply from 10.1.1.2: bytes=56 Sequence=3 ttl=127 time=2 ms

    Reply from 10.1.1.2: bytes=56 Sequence=4 ttl=127 time=5 ms

    Reply from 10.1.1.2: bytes=56 Sequence=5 ttl=127 time=3 ms

 

  --- host.com ping statistics ---

    5 packet(s) transmitted

    5 packet(s) received

    0.00% packet loss

    round-trip min/avg/max = 2/3/5 ms

Complete Configuration

#

 ip host host.com 10.1.1.2

#

Precautions

None

Dynamic Domain Name Resolution Configuration Guide

Domain Name System (DNS) is a distributed database used by TCP/IP applications to translate domain names into corresponding IP addresses. With DNS, you can use easy-to-remember domain names in some applications and let the DNS server translate them into correct IP addresses.

Network Diagram

Figure 1-2 Network diagram for dynamic domain name resolution configuration

 

Networking and Configuration Requirements

l          Switch serves as a DNS client to access the host at 3.1.1.1/16 through domain name host.

l          The DNS server has the IP address 2.1.1.2/16. The domain name suffix is com.

Applicable Product Matrix

Product series	Software version	Hardware version
S5600 series Ethernet switches	Release 1510, Release 1602	All versions
S5100-SI/EI series Ethernet switches	Release 2200, Release 2201	All versions
S3600-SI/EI series Ethernet switches	Release 1510, Release 1602	All versions
S3100-EI series Ethernet switches	Release 2104, Release 2107	All versions
S3100-52P	Release 1500, Release 1602	S3100-52P

 

Configuration Procedure

# Enable dynamic domain name resolution.

<Switch> system-view

[Switch] dns resolve

# Specify the DNS server 2.1.1.2.

[Switch] dns server 2.1.1.2

# Configure com as the DNS suffix.

[Switch] dns domain com

Execute the ping host command on Switch. The ping is successful and the corresponding IP address is 3.1.1.1.

[Switch] ping host

 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=125 time=4 ms

    Reply from 3.1.1.1: bytes=56 Sequence=2 ttl=125 time=4 ms

    Reply from 3.1.1.1: bytes=56 Sequence=3 ttl=125 time=4 ms

    Reply from 3.1.1.1: bytes=56 Sequence=4 ttl=125 time=4 ms

    Reply from 3.1.1.1: bytes=56 Sequence=5 ttl=125 time=5 ms

 

--- host.com ping statistics ---

    5 packet(s) transmitted

    5 packet(s) received

    0.00% packet loss

    round-trip min/avg/max = 4/4/5 ms

Complete Configuration

#

 dns resolve

 dns server 2.1.1.2

 dns domain com

#

Precautions

l          The routes between the DNS server, Switch, and Host are reachable. Necessary configurations are done on the devices.

l          There is a mapping between domain name host and IP address 3.1.1.1/16 on the DNS server.