QinQ
service instance 940 ethernet
description description TEST_OUTER_940_Inner_942
encapsulation dot1q 940 second-dot1q 942
rewrite ingress tag pop 2 symmetric
bridge-domain 942
interface Vlan942
description TEST_OUTER_INNER_TAGs
mtu 9100
ip address 10.97.97.1 255.255.255.252
no ip proxy-arp
end
#ping 10.97.97.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.97.97.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
#sh mac address-table dyn bridge-domain 942
Mac Address Table
——————————————-
BD Mac Address Type Ports
—- ———– ——– —–
942 5087.89fd.d320 DYNAMIC Gi0/24+Efp940
http://d2zmdbbm9feqrf.cloudfront.net/2012/usa/pdf/BRKSPG-2209.pdf
A Catalyst Switch will only look at the first VLAN Tag(Outter), it doesn’t care about the inner vlan tag and will forward the frame on. Just watch your MTU Size, because you lose 4btyes to the inner vlan tag.
A Good Example. http://blog.jhe.co/2009/11/dot1q-tunneling.html
Look at the Routed VPLS/EoMPLS section
What you are looking for a is a VPLS Routed Interface Configuration, just association the VPLS instance with the bridge group. I have never tried this, so I could be wrong, but it’s worth a shot.
Try adding this. This creates’ a VPLS Instance and associates it to the Bridge Group 941.
l2 vfi TESTING manual
vpn id 941
bridge-domain 941
Then under your VLAN Interface associate the VLAN Interface with the VPLS Instanace.
interface Vlan941
xconnect vfi TESTING <<<<<<<<<<<< ADD THIS
description INNER_OUTER_TAG_TEST
mtu 9100
ip address xxx.xxx.xxx.xxx 255.255.255.252 no ip proxy-arp
Also watch your MTU Size’s a mismatch can cause the VPLS instance to be down. You can check it with “show mpls l2transport vc vcid 941 detail”
This looks good
interface GigabitEthernet0/24 <- Connects to 4500X
service instance 940 ethernet
description description Inner_outer_tag_test_Outer_940_Inner_941
encapsulation dot1q 940 second-dot1q 941
rewrite ingress tag pop 2 symmetric
bridge-domain 941
Here is a step by step,
Step By Step Description Commands “semi-colon is a new line”
————————————————————————————————————————–
- Create a Bridge Group l2 vfi TESTING manual; vpn id 820; bridge-domain 820
- Go to the interface interface g0/0/11
- Incoming frame Outter 800, inner 20 encapsulation dot1q 800 second-dot1q 20
- Removed Both Taggs 800 and 20 rewrite ingress tag pop 2 symmetric
- Put Unttagged Frame in Bridge Group 820 bridge-domain 820
Global Config
6a. ASR920 Created L3 Routed Interface bridge-group 820; interface bdi820
6b. ME3800 Create L3 Routed Interface interface vlan 820
6b. ME3800 Connect Interface to BridgeGroup xconnect vfi TESTING
- Assigned IP Address to the Interface ip address 192.168.0.2 255.255.255.0
Cisco 4500X Provider Port
Cisco 4500X Port to ME3800.
Cisco ME3800 Port Config
I Did lab this up on a ASR920, the commands should be fairly close, I noted the difference between the ASR920 and ME3800
Carrier Side: QinQ Interface Outer VLAN 800 InnerVLAN 20 IP 192.168.0.1/24
l2 vfi TESTING manual
vpn id 820
bridge-domain 820
interface GigabitEthernet0/0/11
no ip address
negotiation auto
service instance 820 ethernet
encapsulation dot1q 800 second-dot1q 20
rewrite ingress tag pop 2 symmetric
bridge-domain 820
!!! ON A ASR920
bridge-domain 820
interface BDI820
ip vrf forwarding TESTING2
ip address 192.168.0.2 255.255.255.0
no shut
!!!!ON A ME3800
int vlan 820
xconnect vfi TESTING
ip address 192.168.0.2 255.255.255.0
no shut
ASR920#ping vrf TESTING2 192.168.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
ASR920#show mac-address-table bdomain 820
Nile Mac Address Entries
BD mac addr type ports
———————————————————————————————-
820 0012.448e.8062 DYNAMIC Gi0/0/11.Efp820
ASR920#sh ip arp vrf TESTING2
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.0.1 2 0012.448e.8062 ARPA BDI820
Internet 192.168.0.2 – 00f2.8bdd.603f ARPA BDI820
You must do switchport commands
Services Instance is just a number, we keep it the same as the VLAN Id Under the Service Instance you specify the VLAN ID with endcapsulation dot1q x Rewrite ingress Tag POP 1 symmetric — This removes the first VLAN Tag on in incoming frame, if you do pop 2, it removes the 2 VLAN Tags.
First Example is VPLS with Bridge Domains. Bridge domain ID does not have to the same as the VLAN Id Second Example is EoMPLS XConnect
VPLS
——
l2 vfi VPLS1 manual
vpn id 41
bridge-domain 41
neighbor 1.2.3.4 encapsulation mpls
interface GigabitEthernet0/19
switchport trunk allowed vlan none
switchport mode trunk
mtu 9180
!VPLS Example
service instance 41 ethernet
encapsulation dot1q 41
rewrite ingress tag pop 1 symmetric
bridge-domain 41
!EoMPLS Example
service instance 117 ethernet
encapsulation dot1q 117
rewrite ingress tag pop 1 symmetric
xconnect 3.4.5.6 275 encapsulation mpls pw-class L2VPN
xconnect <Remote router IP> <Unique ID in the AS>
Thanks for the quick reply – We use service instances quite a bit, but only popping first tag, then creating vlan int (for vrf), or PW….so fairly basic stuff 🙂
In this circumstance, where we would receive vlan 800 as outer tag, and we want to access inner vlans 10,20,30 how would this look under a service instance?
- Something like?
service instance 800 ethernet
description description LINK_TO_CARRIER_X_VIA_4500X
encapsulation dot1q 800 second-dot1q 10,20,30
rewrite ingress tag pop 2 symmetric
bridge-domain ?
or a separate service instance and pop inner vlans on each one?
service instance 800 ethernet
description description LINK_TO_CARRIER_X_VIA_4500X
encapsulation dot1q 800 second-dot1q 10
rewrite ingress tag pop 2 symmetric
bridge-domain 10
service instance 801 ethernet
description description LINK_TO_CARRIER_X_VIA_4500X
encapsulation dot1q 800 second-dot1q 20
rewrite ingress tag pop 2 symmetric
bridge-domain 20
You are probably better using a service instance for each vlan. Then you can send each VLAN where ever.
service instance 800 ethernet
description description LINK_TO_CARRIER_X_VIA_4500X
encapsulation dot1q 800 second-dot1q 10
rewrite ingress tag pop 2 symmetric
bridge-domain 10
service instance 801 ethernet
description description LINK_TO_CARRIER_X_VIA_4500X
encapsulation dot1q 800 second-dot1q 20
rewrite ingress tag pop 2 symmetric
bridge-domain 20