Contents

• Configuring DNS Servers
• DNS Servers in Cisco UCS
• Configuring a DNS Server
• Deleting a DNS Server

Configuring DNS Servers

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This chapter includes the following sections:

• DNS Servers in Cisco UCS
• Configuring a DNS Server
• Deleting a DNS Server

DNS Servers in Cisco UCS

You need to specify an external DNS server for each Cisco UCS domain to use if the system requires name resolution of hostnames. For example, you cannot use a name such as www.cisco.com when you are configuring a setting on a fabric interconnect if you do not configure a DNS server. You would need to use the IP address of the server. You can configure up to four DNS servers for each Cisco UCS domain.

Note	When you configure multiple DNS servers, the system searches for the servers only in any random order. If a local management command requires DNS server lookup, it can only search for three DNS servers in random order.

Configuring a DNS Server

Procedure

	Command or Action	Purpose
Step 1	UCS-A# scope system	Enters system mode.
Step 2	UCS-A /system # scope services	Enters system services mode.
Step 3	UCS-A /system/services # create dns ip-addr	Configures the system to use the DNS server with the specified IP address.
Step 4	UCS-A /system/services # commit-buffer	Commits the transaction to the system configuration.

The following example configures a DNS server with the IP address 192.168.200.105 and commits the transaction:

UCS-A# scope system
UCS-A /system # scope services
UCS-A /system/services # create dns 192.168.200.105
UCS-A /system/services* # commit-buffer
UCS-A /system/services # 

Deleting a DNS Server

Procedure

	Command or Action	Purpose
Step 1	UCS-A# scope system	Enters system mode.
Step 2	UCS-A /system # scope services	Enters system services mode.
Step 3	UCS-A /system/services # delete dns ip-addr	Deletes the NTP server with the specified IP address.
Step 4	UCS-A /system/services # commit-buffer	Commits the transaction to the system configuration.

The following example deletes the DNS server with the IP address 192.168.200.105 and commits the transaction:

UCS-A# scope system
UCS-A /system # scope services
UCS-A /system/services # delete dns 192.168.200.105
UCS-A /system/services* # commit-buffer
UCS-A /system/services #