1.1.1
display dns domain
Syntax
display dns domain
View
Any view
Parameter
None
Description
Use the display dns domain command
to display the information in the DNS suffix list.
Related command: dns domain.
Example
# 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
Parameter
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.
Example
# 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
Parameter
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 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 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
Parameter
None
Description
Use the display ip host command to
display the hostnames and corresponding IP addresses in the static DNS list.
Example
# 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
Parameter
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 command: display dns domain.
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 “_”.
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 DNS resolution.
Use the undo dns resolve command to
disable dynamic DNS resolution.
Dynamic DNS resolution is disabled by
default.
Example
# 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
Parameter
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 command: display dns server.
Example
# 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
Syntax
ip host hostname
ip-address
undo ip host
hostname [ ip-address ]
View
System view
Parameter
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 command: display ip host.
Example
# 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
Syntax
reset dns dynamic-host
View
User view
Parameter
None
Description
Use the reset dns dynamic-host
command to clear the dynamic DNS cache.
Related command: display dns
dynamic-host.
Example
# Clear the dynamic DNS cache.
<H3C> reset dns dynamic-host
