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- Table of Contents
-
- H3C S7500 Series Command Manual(Release 3100 Series)-(V1.04)
- 00-1Cover
- 01-CLI Commands
- 02-Login Commands
- 03-Configuration File Management Commands
- 04-VLAN Commands
- 05-Extended VLAN Application Commands
- 06-IP Address-IP Performance-IPX Commands
- 07-GVRP Commands
- 08-QinQ Commands
- 09-Port Basic Configuration Commands
- 10-Link Aggregation Commands
- 11-Port Isolation Commands
- 12-Port Binding Commands
- 13-DLDP Commands
- 14-MAC Address Table Commands
- 15-MSTP Commands
- 16-Routing Protocol Commands
- 17-Multicast Commands
- 18-802.1x Commands
- 19-AAA-RADIUS-HWTACACS-EAD Commands
- 20-Traffic Accounting Commands
- 21-VRRP-HA Commands
- 22-ARP Commands
- 23-DHCP Commands
- 24-ACL Commands
- 25-QoS Commands
- 26-Mirroring Commands
- 27-Cluster Commands
- 28-PoE Commands
- 29-UDP-Helper Commands
- 30-SNMP-RMON Commands
- 31-NTP Commands
- 32-SSH Terminal Service Commands
- 33-File System Management Commands
- 34-FTP and TFTP Commands
- 35-Information Center Commands
- 36-DNS Commands
- 37-System Maintenance and Debugging Commands
- 38-HWPing Commands
- 39-RRPP Commands
- 40-NAT-Netstream-Policy Routing Commands
- 41-Telnet Protection Commands
- 42-Hardware-Dependent Software Configuration Commands
- 43-Appendix
- Related Documents
-
| Title | Size | Download |
|---|---|---|
| 36-DNS Commands | 54 KB |
Table of Contents
Chapter 1 DNS Configuration Commands
1.1 DNS Configuration Commands
1.1.2 display dns dynamic-host
Chapter 1 DNS Configuration Commands
1.1 DNS Configuration Commands
1.1.1 display dns domain
Syntax
display dns domain
View
Any view
Parameters
None
Description
Use the display dns domain command to display the information in the DNS suffix list.
Related commands: dns domain.
Examples
# Display the information in the DNS suffix list.
<H3C> display dns domain
No. Domain-name
0 aaa.com
Table 1-1 Description on the fields of the display dns domain command
|
Field |
Description |
|
No. |
Sequence number |
|
Domain-name |
Domain suffix name |
1.1.2 display dns dynamic-host
Syntax
display dns dynamic-host
View
Any view
Parameters
None
Description
Use the display dns dynamic-host command to display information about the dynamic DNS cache.
The DNS client saves a successful DNS resolution result to the DNS cache. When receiving a name query, the DNS Client first looks up the DNS cache for a match. If a match is found, it returns the corresponding IP address to the user program. If not, it sends a query to the DNS server.
Examples
# Display the information in the dynamic DNS cache.
<H3C> display dns dynamic-host
No. Domain-name IpAddress TTL Alias
0 www.baidu.com 202.108.249.134 63000
1 www.yahoo.akadns.net 66.94.230.39 24
2 www.hotmail.com 207.68.172.239 3585
3 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 |
|
IpAddress |
IP address corresponding to the domain name |
|
TTL |
Time for the entry to be stored in the cache (in seconds) |
|
Alias |
Alias name for the domain name, up to 4 |
1.1.3 display dns server
Syntax
display dns server [ dynamic ]
View
Any view
Parameters
Dynamic: Specifies to display the DNS server information dynamically obtained by DHCP or other protocols.
Description
Use the display dns server command to display the DNS server information.
Related commands: dns server.
Examples
# Display the DNS server information.
<H3C> display dns server
Domain-server IpAddress
0 169.254.65.125
1 169.254.66.15
Table 1-3 Description on the fields of the display dns server command
|
Field |
Description |
|
Domain-server |
Sequence number of the DNS server. The system automatically numbers the configured DNS servers starting from 0. |
|
IpAddress |
IP address of the DNS server |
1.1.4 display ip host
Syntax
display ip host
View
Any view
Parameters
None
Description
Use the display ip host command to display the hostnames and corresponding IP addresses in the static DNS list.
Examples
# Display the hostnames and corresponding IP addresses in the static DNS list.
<H3C> 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 the fields of the display ip host command
|
Field |
Description |
|
Host |
Hostname |
|
Age |
Time to live. It is always 0 for static entries, meaning the static entries will never age out. A static name-to-address mapping entry can only be manually removed. |
|
Flags |
Type flag for the name-to-address mapping entry. It is "static" for static entries. |
|
Address |
IP address of the host |
1.1.5 dns domain
Syntax
dns domain domain-name
undo dns domain [ domain-name ]
View
System view
Parameters
domain-name: DNS suffix, a string of 1 to 60 characters, including alphanumeric characters, hyphens (-), underscores (_), and dots (.).
Description
Use the dns domain command to configure a DNS suffix.
Use the undo dns domain command to delete one or all DNS suffixes.
No DNS suffix is configured by default.
You can configure up to 10 DNS suffixes.
When you execute the undo dns domain command:
l If you specify a DNS suffix, only the specified DNS suffix is removed,
l Otherwise, all statically configured suffixes are removed.
Related commands: display dns domain.
& Note:
The DNS function supported by S7500 switches must be used together with a DNS server. DNS servers differ from one another in DNS implementation. For example, the S7500 supports a domain name which includes “_”, while Windows 2000 Server may be unable to resolve the “_”.
Examples
# Configure com as a DNS suffix.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] dns domain com
1.1.6 dns resolve
Syntax
dns resolve
undo dns resolve
View
System view
Parameters
None
Description
Use the dns resolve command to enable dynamic DNS resolution.
Use the undo dns resolve command to disable dynamic DNS resolution.
Dynamic DNS resolution is disabled by default.
Examples
# Enable dynamic DNS resolution.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] dns resolve
1.1.7 dns server
Syntax
dns server ip-address
undo dns server [ ip-address ]
View
System view
Parameters
ip-address: IP address of a DNS server.
Description
Use the dns server command to configure an IP address for a DNS server.
Use the undo dns server to remove a configured DNS server IP address.
No DNS server IP address is configured by default.
You can configure up to 6 DNS servers.
Related commands: display dns server.
Examples
# Configure a DNS server with an IP address of 172.16.1.1.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] 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
Parameters
Hostname: Hostname, a string of 1 to 30 characters, including alphanumeric characters, hyphens (-), or dots (.). It must contain at least one letter.
ip-address: IP address of the specified host, in dotted decimal notation.
Description
Use the ip host command to add a hostname-to-IP address mapping entry in the static DNS list.
Use the undo ip host command to remove a mapping entry from the static DNS list.
By default, there is no entry in the static DNS list.
One hostname can be mapped to only one IP address. When you add multiple hostname-to-address mapping entries with the same hostname, only the last one will be valid.
Related commands: display ip host.
Examples
# Configure a mapping entry from the host named aaa to the IP address 10.110.0.1
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] ip host aaa 10.110.0.1
1.1.9 reset dns dynamic-host
Syntax
reset dns dynamic-host
View
User view
Parameters
None
Description
Use the reset dns dynamic-host command to clear the dynamic DNS cache.
Related commands: display dns dynamic-host.
Examples
# Clear the dynamic DNS cache.
<H3C> reset dns dynamic-host
