1.1.1
display dns domain
Syntax
display dns domain [ dynamic ]
View
Any view
Parameter
dynamic: Displays
the DNS suffixes dynamically obtained through DHCP or other protocols.
Description
Use the display dns domain command
to display the DNS suffixes.
Related command: dns domain.
Example
# Display DNS suffixes
<H3C> display dns domain
No Domain-name
0 aaa.com
Table 1-1
Description on fields of the display dns domain
command
|
Field
|
Description
|
|
No
|
Sequence number
|
|
Domain-name
|
DNS 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 information in the dynamic domain name cache.
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 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 fields of the display dns
dynamic-host command
|
Field
|
Description
|
|
No
|
Sequence number
|
|
Domain-name
|
Domain name
|
|
IpAddress
|
IP address of the corresponding domain
name
|
|
TTL
|
Time for which an entry is cached in
seconds.
|
|
Alias
|
Alias for the domain name. There can be four
aliases at most.
|
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.
<H3C> display dns server
Domain-server IpAddress
0 169.254.65.125
1 169.254.66.15
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 0.
|
|
IpAddress
|
IP address of the DNS Server
|
1.1.4 display
ip host
Syntax
display ip host
View
Any view
Parameter
None
Description
Use the display ip host command to
display mappings between host names and IP addresses in the static DNS database.
Example
# Display mappings between host names and
IP addresses in the static DNS database.
<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 fields of the display ip host
command
|
Field
|
Description
|
|
Host
|
Host name
|
|
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 indicates static mapping between host
names and IP addresses
|
|
Address
|
IP address of a host
|
1.1.5 dns
domain
Syntax
dns domain domain-name
undo dns domain [ domain-name ]
View
System view
Parameter
domain-name:
DNS suffix, a string of 1 to 60 characters which can be letters, numbers,
hyphens (-), underscores (_), and dots (.).
Description
Use the dns domain command to
configure a DNS suffix.
Use the undo dns domain command to
delete the configured DNS suffix.
No DNS suffix is configured by default.
You can configure a maximum of 10 DNS
suffixes. You must enter the DNS suffix before deleting it. Otherwise, all statically
configured DNS suffixes are deleted.
Related command: display dns domain.
The DNS feature
supported by S3600 serial Ethernet switches should be used together with a DNS
server. DNS implementations vary with DNS servers. For example, S3600 serial
Ethernet switches support a domain name containing “_”, while a
Windows 2000 Server may not be able to resolve the domain name.
Example
# Configure com as a DNS suffix.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] dns domain com
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.
<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
Parameter
ip-address:
IP address of the DNS Server.
Description
Use the dns server command to configure
an IP address for the DNS Server.
Use the undo dns server to remove the
IP address of the DNS server.
No IP address is configured for the DNS
Server by default.
You can configure a maximum of 6 DNS
Servers.
Related command: display dns server.
Example
# Configure 172.16.1.1 for a DNS Server.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] dns server 172.16.1.1
Syntax
ip host hostname
ip-address
undo ip host
hostname [ ip-address ]
View
System view
Parameter
hostname:
Host name, a string of 1 to 20 characters which can be 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 DNS database.
Use the undo ip host command to
remove the mapping.
No mappings are created by default.
Each host name can correspond to only one
IP address. When IP addresses are configured for the same host for multiple
times, only the IP address configured last time is valid.
Related command: display ip host.
Example
# Configure the IP address 10.110.0.1 for
the host named aaa.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] ip host aaa 10.110.0.1
Syntax
nslookup type { ptr ip-address | a domain-name }
View
Any view
Parameter
ptr ip-address:
Resolves the corresponding domain name for an IP address.
a domain-name: Resolves the corresponding IP address for a DNS
domain name. A domain name consists of a string of up to 30 characters. Automatic
domain name addition is supported.
Description
Use the nslookup type command to display
DNS resolution result, namely, the domain name for a specified IP address or IP
address for a specified domain name.
Example
# Display the corresponding domain name for
192.168.3.2.
<H3C> nslookup type ptr 192.168.3.2
Trying DNS server (10.72.66.36)
Name: www.h3c.com
Address: 192.168.3.2
# Display the corresponding IP address for www.h3c.com.
<H3C> nslookup type a www.h3c.com
Trying DNS server (10.72.66.36)
Name: www.h3c.com
Address: 192.168.3.2
Syntax
reset dns dynamic-host
View
User view
Parameter
None
Description
Use the reset dns dynamic-host
command to clear information in the dynamic domain name cache.
Related command: display dns
dynamic-host.
Example
# Clear the information in the dynamic
domain name cache.
<H3C> reset dns dynamic-host
