802.1Q Tunneling (Q-in-Q) | Brief Overview and Sample Configuration

In this video I briefly touch on the concepts of Q-in-Q.

R1

interface gi0/0.10
encapsulation dot1q 10
ip address 192.168.10.1 255.255.255.0

R2

interface gi0/0.10
encapsulation dot1q 10
ip address 192.168.10.2 255.255.255.0

SW1

system mtu 1504
vlan 101
vlan dot1q tag native

interface gi0/3
switchport mode dot1q-tunnel
switchport access vlan 101

interface gi0/1
switchport trunk encapsulation dot1q
switchport mode trunk

SW2

system mtu 1504
vlan 101

interface gi0/1
switchport trunk encapsulation dot1q
switchport mode trunk

interface gi0/2
switchport trunk encapsulation dot1q
switchport mode trunk

SW3

system mtu 1504
vlan 101
vlan dot1q tag native

interface gi0/2
switchport trunk encapsulation dot1q
switchport mode trunk

interface gi0/3
switchport mode dot1q-tunnel
switchport access vlan 101

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