Administrator Guide

Switch Management Commands 1993
Syntax
ip name-server source-interface {loopback loopback-id | tunnel tunnel-id |
vlan vlan-id }
no ip name-server source-interface
• loopback-id— A loopback interface identifier.
• tunnel-id— A tunnel identifier.
• vlan-id— A VLAN identifier.
Default Configuration
By default, the switch uses the assigned switch IP address as the source IP
address for DNS packets. This address is either the IP address assigned to the
VLAN from which the DNS packet originates or the out-of-band interface IP
address.
Command Mode
Global Configuration mode
User Guidelines
The source interface must have an assigned IP address (assigned either
manually or via another method such as DHCP).
The use of a source interface allows firewalls devices to identify DNS packets
as coming from a specific switch. If the source interface is not specified, the
primary address of the outbound interface is used as the source interface. If
the specified interface is down, the DNS client falls back to it’s original
(unconfigured) behavior.
This command is not supported on Dell EMC N1100-ON switches. Dell
EMC N1100-ON switches support configuration of a single IP address in
interface vlan configuration mode. That IP address is used as the source
interface address for this function.
Command History
Introduced in version 6.3.0.1 firmware.