Mikrotik Inter-AS MPLS L3VPN

RouterOS Forwarding Protocols
1

Hi all,

I am trying to find an example of inter-AS MPLS L3VPN with Mikrotik.
Regarding MPLS L3VPN inside same AS everything is ok, I did some test and integrate it and it is working fine.
However, problem is when I am trying in LAB to exchange L3VPN routes between two ASs I am not succeeding in it. Many examples I found but it is all for Cisco, nothing found for Mikrotik.
For start I used this example http://wiki.mikrotik.com/wiki/Manual:Layer-3_MPLS_VPN_example. Only difference is I added one more P router because I was planning later to make test of MPLS L3VPN with to AS. Left side would be one AS and right side would be another AS.
Inter-AS connection would happen between two P routers which means those routers would become ASBRs.
When I followed this example and did tests inside same AS everything was working fine, I had VPN4 routes on CE devices and I could ping, trace it, everything was working fine.
After I did test by dividing left and right side into separate AS problem occurred. On CE routers I got all VPN4 routes but traceroute from one to another is not working. Obviously some settings between two ASBRs are not configured as it should be.
All I could find online is documentation for Cisco but it is not of any help since there is one option in Cisco which Mikrotik doesn’t have - mpls bgp forwarding .
Sadly but Mikrotik documentation and examples are really rare and hard to find. Only example inside the same AS but not one I could find showing MPLS L3VPN between two AS.
I am familiar with three possibilities how it can be done:

  1. Inter-AS MPLS L3VPN – Option A – Back to Back VRF (example is here https://mellowd.co.uk/ccie/?p=3766 )
  2. Inter-AS MPLS L3VPN – Option B – ASBR + VPNv4 (example is here https://mellowd.co.uk/ccie/?p=3783 )
  3. Inter-AS MPLS L3VPN – Option C – BGP + Label ( example is here https://mellowd.co.uk/ccie/?p=3804 )
    I am interested in option 2 and possibly in option 1.
    Does anybody have any experience regarding BGP peering and exchanging MPLS L3VPN routes or any example of configuration to share?
    This is NNI we are talking about.