Pseudowire With Multiple Input VLANs

[ben.wiechman]

We have a customer with multiple sites they want to hand off to us at two handoff points. At each handoff point we are to be provided with multiple vlans (5-8), one for each of their sites. Each vlan will have a specific prefix associated with it, with us providing their L3 gateway interface on an ASR 9k. 

We've been trying to come up with a way to handle each of the two handoffs within a single pw, but are struggling to come up with a way to ensure that the downstream traffic is classified in the appropriate vlan when we hand it back off to the customer. 

Would something like this work? 

Handoff interface at site1

int xxxx.x l2transport

encapsulation dot1q 210-217

rewrite ingress tag push dot1q OUTER_TAG sym

PE

(trunk interfaces to border router)

int yyyy.210 l2transport 

encapsulation dot1q 210

rewrite integress tag push dot1q OUTER_TAG sym

int yyyy.211 l2transport 

encapsulation dot1q 211

rewrite integress tag push dot1q OUTER_TAG sym

etc

l2vpn

bg

bd

  neighbor... pw-id blah

    backup neigh ... pw-id blah2

  int yyyy.210

  int yyyy.211

  int yyyy.212

And then on the Border build the L3 interfaces on each of those subinterfaces, add to IGP, etc? 

int zzzz1.210 

  encapsulation dot1q 210

  rewrite ingress tag pop 1 sym

  ipv4 address 1.1.1.1 255.255.255.0

  etc. 

[sreenivasgajula]

This is interesting. So, your customer has VLAN's 210-217 and you have to have a gateway for each VLAN.

I'd rather do it this way:

Hand-off to customer:

int yyyy.210 l2transport 

encapsulation dot1q 210

rewrite integress tag pop 1 symmetric

int yyyy.211 l2transport 

encapsulation dot1q 211

rewrite integress tag pop 1 symmetric

 Build l2vpn xconnect's to the border router.

l2vpn

 xconnect group

 int yyyy.210 l2transport 

neighbor ipv4 A.B.C.D pw-id XYZ

On the border router:

Create BVI's with gateway IP addresses associated with each VLAN.

interface BVI 210

ipv4 address x.y.z.z/xx

Create a bridge-domain for each VLAN;

bridge group XYZ

 bridge-domain XYZ

  neighbor ipv4 [hand-off router] pw-id XYZ

  "add another PW for other hand-off sites if needed"

routed interface BVI 210

Add all the BVI's to an IGP

router ospf 1

area 0

interface BVI 210

interface BVI 211

....etc

Are these routers dedicated for this customer? Reason being all the routes would be in the global routing table....

Let me know if this makes sense.