tpvm dns

Configures the DNS server details for the TPVM instance. DNS configuration CLI already supports IPv4 address. It is enhanced to support IPv6 address.

Syntax

dns primary-server [ ipv4-addr | ipv6-addr ] secondary-server [ ipv4-addr | ipv6-addr ] { domain domain-name }

no dns [ primary-server ] [ secondary-server ] [ domain ]

Command Default

By default, a DNS server is not configured in TPVM.

Parameters

primary-server [ ipv4-addr | ipv6-addr ]: Adds a DNS server. Specifies the mandatory (primary) DNS server IP. DNS server IP can be in IPv4 or IPv6 format.
secondary-server [ ipv4-addr | ipv6-addr ]: Adds a secondary DNS server. This server will be used to resolve addresses in case the primary DNS server fails for any reason. Secondary DNS server IP can be in IPv4 or IPv6 format.
domain-name domain-name: Specifies the domain name for the DNS server. You can configure only one domain name.

Modes

TPVM Configuration mode

Usage Guidelines

When configuring DNS servers, both the primary and secondary servers should have the same IP address format.
When changing the DNS server IP of the primary server from one IP format to another, the secondary DNS server configuration will not be retained and must be reconfigured.
The secondary DNS server IP cannot be changed from one IP format to another without making the same change to the primary DNS server. You cannot modify only the secondary DNS server.
While re-configuring the primary IPv4 address to IPv6 address, then implicitly of secondary IPv4 address is removed.
You cannot change the secondary address alone from IPv4 to IPv6, till both primary and secondary address is provide.
If you re-configure primary IPv6 address to IPv4 address, then implicitly of secondary IPv6 address is removed.

Examples

This example shows the configuration of DNS server.

SLX(config-tpvm-TPVM)# dns primary-server ?
Possible completions: 
    <A.B.C.D> IPv4 address of primary DNS 
    <A:B::C:D> IPv6 address of primary DNS

This example shows the configuration of a IPv6 primary DNS server and configures its domain.

SLX(config-tpvm-TPVM)# dns primary-server 100:23::45:55 ?
Possible completions: 
    domain             Domain name 
    secondary-server   Secondary name server 
<cr> 
SLX(config-tpvm-TPVM)# dns primary-server 100:23::45:55
    secondary-server 110:13::15:51 domain ? 
 Possible completions: 
    <string>
SLX(config-tpvm-TPVM)# dns primary-server 100:23::45:55
    secondary-server 110:13::15:51 domain extreme

This example removes the secondary DNS server configuration from the TPVM.

SLX (config-tpvm-TPVM)# no dns secondary-server