[j-nsp] ng-mvpn problem

[Stacy W. Smith]

On Oct 22, 2013, at 2:44 PM, Mihai <mihaigabriel at gmail.com> wrote:
> Removing PIM fromlt-1/1/10.770 is not a solution because the PE will not learn about the source and the multicast group.

Actually, removing lt-1/1/10.770 from PIM would allow the source and multicast group to be learned, and fix the problem (as long as multicast routing was still enabled on the lt-1/1/10.770 interface).

The problem is that there's a PIM neighbor relationship between a and x. Because of your IP addressing, a is the DR for the a-x LAN.

Because you are injecting traffic with ping and "bypass-routing interface lt-1/1/10.771" logical-system a is NOT the first-hop router. It's simply acting as a multicast source that's pumping traffic with destination IP 225.10.10.10 out the lt-1/1/10.771 interface.

Logical-system x instance mvpn receives this traffic on lt-1/1/10.770 and does not forward it because it is not the DR.

Therefore, the logical-system x instance mvpn doesn't learn about the active (S,G).

Another way to solve this problem is disabling PIM on logical-system a. This will make lt-1/1/10.770 on logical-system x instance mvpn the DR, and cause it to learn about the active S,G (and therefore generate the NG-MVPN Type 5 route).

I have mocked up your configuration in the lab and confirmed that removing PIM from logical-system a fixes the issue.

--Stacy