QinQ Tunneling

2811 Config

interface FastEthernet0/1.400
 encapsulation dot1Q 1400 second-dot1q 400
 ip address 172.16.40.1 255.255.255.0
!
interface FastEthernet0/1.401
 encapsulation dot1Q 1400 second-dot1q 401
 ip address 172.16.41.1 255.255.255.0
!
interface FastEthernet0/1.402
 encapsulation dot1Q 1400 second-dot1q 402
 ip address 172.16.42.1 255.255.255.0

3750 Config

interface FastEthernet3/0/48
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1400
 switchport mode trunk
 speed 100
 duplex full
!
interface GigabitEthernet3/0/3
 switchport access vlan 1400
 switchport mode dot1q-tunnel
 speed nonegotiate
 mls qos trust ip-precedence
 no cdp enable
 spanning-tree bpdufilter enable

3560 Config

interface GigabitEthernet0/28
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 400-402
 switchport mode trunk
 speed nonegotiate
end
!
interface Vlan400
 ip address 172.16.40.2 255.255.255.0
!
interface Vlan401
 ip address 172.16.41.2 255.255.255.0
!
interface Vlan402
 ip address 172.16.42.2 255.255.255.0

Verification

3750#show dot1q-tunnel
dot1q-tunnel mode LAN Port(s)
-----------------------------
Gi3/0/3

3750#show spanning-tree vlan 1400
VLAN1400
  Spanning tree enabled protocol ieee
  Root ID    Priority    34368
             Address     0022.be7a.8480
             This bridge is the root
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
  Bridge ID  Priority    34368  (priority 32768 sys-id-ext 1400)
             Address     0022.be7a.8480
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300
Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Gi3/0/3          Desg FWD 4         128.135  P2p
Fa3/0/48         Desg FWD 19        128.160  P2p

3560#ping 172.16.40.1
!!!!!

c3560#ping 172.16.41.1
!!!!!

c3560#ping 172.16.42.1
!!!!!