The Network Interface Device (NID) support feature enables support for the NID functionality on a device without including an NID hardware in the network. This feature combines the Customer-Premises Equipment (CPE) and the NID functionality into a physical device. The following are the advantages of configuring the NID functionality:

• Eliminates the need for a physical NID device and trunk roll.

• Supports both the managed CPE feature set and the NID requirements.

The NID Support feature is supported on the following platforms:

• Cisco ISR 4000 Series Integrated Services Routers

Perform the following task to configure NID support:

enable 
    configure terminal
        interface gigabitEthernet 0/0/2  
            no ip address
            port tagging  
            encapsulation dot1q 10
            set cos 6
            end

This configuration example shows how to configure the NID:

Device>enable
Device#configure terminal
Device(config)#interface gigabitethernet 0/2
Device(config-if)#port-tagging
Device(config-if-port-tagging)#encapsulation dot1q 10
Device(config-if-port-tagging)#set cos 6
Device(config-if-port-tagging)#end

Use the following commands to verify the port tagging sessions:

• show run int

• ping

Use the show run int command to display the port tagging sessions:

Device#show run interface GigabitEthernet 0/2
Building configuration...
Current configuration : 10585 bytes
!
interface GigabitEthernet0/2
 no ip address
 duplex auto
 speed auto
 port-tagging
  encapsulation dot1q 10
  set cos 6
  exit
end
!
interface GigabitEthernet0/2.1101
encapsulation dot1Q 100 
ip address 10.0.2.4 255.255.255.0
!
interface GigabitEthernet0/2.1102
encapsulation dot1Q 100
ip address 10.0.3.4 255.255.255.0
!

Use the ping command to verify the connectivity with port tagging configured:

Device#ping
 10.0.2.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.2.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
router#