Users Guide

Switch Management Commands 2095
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.
Example
The following example configures a source interface for a VLAN interface
that obtains its address via DHCP:
console#configure
console(config)#interface vlan 1
console(config-if-vlan1)#ip address dhcp
console(config-if-vlan1)#exit
console(config)#ip name-server source-interface vlan 1
This example configures a source interface for a loopback interface. Using a
loopback address is the recommended method for assigning a source
interface.
console#configure
console(config)#interface loopback 0
console(config-if-vlan1)#ip address 129.168.0.13 /32
console(config-if-vlan1)#exit
console(config)#ip name-server source-interface vlan 1
ipv6 address (Interface Configuration)
Use the ipv6 address command to set the IPv6 address of an interface. Use
the no form of this command to reset the IPv6 address to the default.