- Table of Contents
-
- H3C S5500-SI Series Ethernet Switches Command Manual-Release 1205-(V1.03)
- 00-1Cover
- 01-Login Command
- 02-Basic System Configuration and Maintenance Command
- 03-File System Management Command
- 04-VLAN Command
- 05-QinQ-BPDU TUNNEL Command
- 06-Port Correlation Configuration Command
- 07-MAC Address Table Management Command
- 08-MSTP Commands
- 09-IP Address and Performance Command
- 10-IPv6 Configuration Command
- 11-Routing Overview Command
- 12-IPv4 Routing Command
- 13-IPv6 Routing Command
- 14-802.1x-HABP-MAC Authentication Command
- 15-AAA-RADIUS-HWTACACS Command
- 16-Multicast Protocol Command
- 17-ARP Command
- 18-DHCP Command
- 19-ACL Command
- 20-QoS Command
- 21-Port Mirroring Command
- 22-Cluster Command
- 23-SNMP-RMON Command
- 24-NTP Command
- 25-DNS Command
- 26-Information Center Command
- 27-NQA Command
- 28-SSH Terminal Service Command
- 29-UDP Helper Command
- 30-SSL-HTTPS Command
- 31-PKI Command
- 32-PoE-PoE Profile Command
- 33-Appendix
- Related Documents
-
Title | Size | Download |
---|---|---|
25-DNS Command | 56 KB |
Chapter 1 DNS Configuration Commands
1.1 DNS Configuration Commands
1.1.1 display dns domain
Syntax
display dns domain [ dynamic ]
View
Any view
Parameter
dynamic: Displays the domain name suffixes dynamically obtained through DHCP or other protocols.
Description
Use the display dns domain command to display the domain name suffixes.
Related command: dns domain.
Example
# Display domain name suffixes.
<Sysname> display dns domain
Type:
D:Dynamic S:Static
No. Type Domain-name
1 S net
2 S com
Table 1-1 Description on fields of display dns domain command
Field |
Description |
No. |
Sequence number |
Type |
Type of domain name suffix: S represents a statically configured domain name suffix, and D represents a domain name suffix obtained dynamically through DHCP. |
Domain-name |
Domain name suffix |
1.1.2 display dns dynamic-host
Syntax
display dns dynamic-host
View
Any view
Parameter
None
Description
Use the display dns dynamic-host command to display the dynamic domain name resolution cache information.
After a successful domain name resolution, the DNS Client saves the result in the cache. In the case of a repeated domain name resolution request, the DNS Client first searches the cache for the mapping between the domain name and the IP address. If the mapping is cleared because of timeout, the DNS Client sends the domain name resolution request to the DNS server.
Example
# Display the information in the dynamic domain name resolution cache.
<Sysname> display dns dynamic-host
No Domain-name IP Address TTL
1 www.baidu.com 202.108.249.134 63000
2 www.yahoo.akadns.net 66.94.230.39 24
3 www.hotmail.com 207.68.172.239 3585
4 www.eyou.com 61.136.62.70 3591
Table 1-2 Description on the field of the display dns dynamic-host command
Field |
Description |
No. |
Sequence number |
Domain-name |
Domain name |
IP Address |
IP address for the corresponding domain name |
TTL |
Time for storing in the cache memory (s). |
& Note:
The domain-name field in the display dns dynamic-host command contains 21 characters at most. If a resolved domain name consists of more than 21 characters, only the first 21 characters are displayed.
1.1.3 display dns server
Syntax
display dns server [ dynamic ]
View
Any view
Parameter
dynamic: Displays the DNS Server information dynamically obtained through DHCP or other protocols
Description
Use the display dns server command to display the DNS Server information.
Related command: dns server.
Example
# Display the DNS Server information.
<Sysname> display dns server
Type:
D:Dynamic S:Static
IPv4 DNS Servers :
Domain-server Type IP Address
1 S 169.254.65.125
IPv6 DNS Servers :
Domain-server Type IPv6 Address (Interface Name)
1 S 3001::2
Table 1-3 Description on fields of the display dns server command
Field |
Description |
Domain-server |
Number of the DNS Server. Configured automatically by the device, starts from 1. Servers with IPv4 or IPv6 addresses are numbered respectively. |
Type |
Type of domain name server: S represents a statically configured domain name suffix, and D represents a domain name suffix obtained dynamically through DHCP. |
IP Address |
IPv4 address of the DNS Server |
IPv6 Address |
IPv6 address of the DNS Server |
Interface Name |
Only available when the DNS Server is configured with an IPv6 address. |
1.1.4 display ip host
Syntax
display ip host
View
Any view
Parameter
None
Description
Use the display ip host command to display the host names and corresponding IP addresses in the static domain name resolution resolving list.
Example
# Display the host names and corresponding IP addresses in the static domain name resolution resolving list.
<Sysname> display ip host
Host Age Flags Address
My 0 static 1.1.1.1
Aa 0 static 2.2.2.4
Table 1-4 Description on fields of the display ip host command
Field |
Description |
Host |
Host |
Age |
Time to live. 0 means that a static entry is never outdated. You can only manually remove the mappings between host names and IP addresses. |
Flags |
Indicates the type of mappings between host names and IP addresses, static or dynamic. Static is the type for static domain name resolution |
Address |
Host IP addresses |
1.1.5 dns domain
Syntax
dns domain domain-name
undo dns domain [ domain-name ]
View
System view
Parameter
domain-name: DNS suffixes, comprises 1 to 238 characters, including case-insensitive letters, numbers, hyphens (-), underscores (_), and dots (.).
Description
Use the dns domain command to configure the DNS suffixes.
Use the undo dns domain command to delete the DNS suffixes.
No DNS suffixes are configured by default.
You can configure maximum 10 DNS suffixes. You must input the suffix name to delete it, otherwise, all the statically configured suffixes are deleted.
Related command: display dns domain.
Example
# Configure com as a DNS suffix.
<Sysname> system-view
[Sysname] dns domain com
1.1.6 dns resolve
Syntax
dns resolve
undo dns resolve
View
System view
Parameter
None
Description
Use the dns resolve command to enable dynamic domain name resolution.
Use the undo dns resolve command to disable dynamic domain name resolution.
Dynamic domain name resolution is disabled by default.
Example
# Enable dynamic domain name resolution.
<Sysname> system-view
[Sysname] dns resolve
1.1.7 dns server
Syntax
dns server ip-address
undo dns server [ ip-address ]
View
System view
Parameter
ip-address: IP address of the DNS Server.
Description
Use the dns server command to configure an IP address to the DNS Server.
Use the undo dns server to remove IP addresses.
No IP address is configured to the DNS Server by default.
You can configure maximum 6 DNS Servers.
Related command: display dns server.
Example
# Configure a DNS Server address to 172.16.1.1.
<Sysname> system-view
[Sysname] dns server 172.16.1.1
1.1.8 ip host
Syntax
ip host hostname ip-address
undo ip host hostname [ ip-address ]
View
System view
Parameter
Hostname: Host name, comprises 1 to 20 characters, including case-insensitive letters, numbers, hyphens (-), or dots (.). The host name must include at least one letter.
ip-address: IP address of the specified host in dotted decimal notation.
Description
Use the ip host command to create a mapping between host name and IP address in the static resolving list.
Use the undo ip host command to remove the mapping.
No mappings are created by default.
You can configure only one mapping between IP address to host name. For example, a new mapping configured will overwrite the old one if there is any.
Related command: display ip host.
Example
# Configure IP address 10.110.0.1 to a host named aaa.
<Sysname> system-view
[Sysname] ip host aaa 10.110.0.1
1.1.9 reset dns dynamic-host
Syntax
reset dns dynamic-host
View
User view
Parameter
None
Description
Use the reset dns dynamic-host command to clear the cache.
Related command: display dns dynamic-host.
Example
# Clear the cache.
<Sysname> reset dns dynamic-host