interface GigabitEthernet1
 ip address dhcp
!
interface GigabitEthernet2
 ip address 203.0.113.27 255.255.255.0
!
interface GigabitEthernet3
 ip address 192.0.2.1 255.255.255.0 secondary
 ip address 192.0.2.2 255.255.255.0
 ipv6 address 2001:DB8:0:3::/64
 ipv6 address autoconfig
!
interface GigabitEthernet4
!
