[c-nsp] Multicast not working with physical interface

[selamat pagi]

When the 2 PE routers (IBGP) connect via their loopback address,
everything works fine. Multicast source R7 can send data to receiver R8

However as soon as I use the physical address, BGP comes up, icmp is ok, but
no more multicast trafffic.

Setup:
CE R7 - PE R3 --- MPLS -- PE R6 --- CE R8

R7 / R8 are in vrf BLUE

Any idea would be very appreciated,
 thankx, keti


*Config R3*
ip vrf BLUE
 rd 1:100
 route-target export 1:100
 route-target import 1:100
 bgp next-hop Loopback0  <-- this command seems not to have any effect
 mdt default 232.0.0.1

ip multicast-routing
ip multicast-routing vrf BLUE
ip pim ssm default


R3#*sh ip pim int*
Address          Interface                Ver/   Nbr    Query  DR     DR
                                          Mode   Count  Intvl  Prior
150.1.3.3        Loopback0                v2/S   0      30     1
150.1.3.3
150.1.13.3       Serial3/0                v2/S   1      30     1
0.0.0.0

R3#*sh ip pim vrf BLUE int*
Address          Interface                Ver/   Nbr    Query  DR     DR
                                          Mode   Count  Intvl  Prior
150.1.3.3        Tunnel0                  v2/S   0      30     1
150.1.3.3
10.1.37.3        Ethernet0/0              v2/S   1      30     1
10.1.37.7

R3#*sh ip pim mdt*
  MDT Group       Interface   Source                   VRF
* 232.0.0.1       Tunnel0     Loopback0                BLUE
R3#

R3#*sh ip pim mdt bgp *
Peer (Route Distinguisher + IPv4)                                  Next Hop
  MDT group 232.0.0.1
   2:1:100:150.1.6.6
150.1.56.6


R3#*sh ip bgp vpnv4 all*
BGP table version is 11, local router ID is 150.1.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf BLUE)
*> 10.1.7.7/32      10.1.37.7                1         32768 ?
*>i10.1.8.8/32      150.1.6.6                1    100      0 ?
*> 10.1.37.0/24     0.0.0.0                  0         32768 ?
*>i10.1.68.0/24     150.1.6.6                0    100      0 ?
Route Distinguisher: 2:1:100
*> 150.1.3.3/32     0.0.0.0                                0 ?
*>i150.1.6.6/32     150.1.56.6               0    100      0 ?




R3#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
       L - Local, P - Pruned, R - RP-bit set, F - Register flag,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report,
       Z - Multicast Tunnel, z - MDT-data group sender,
       Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched, A - Assert winner
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(150.1.3.3, 232.0.0.1), 00:24:23/00:02:53, flags: sPT
  Incoming interface: Loopback0, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(150.1.56.6, 232.0.0.1), 00:19:41/stopped, flags: sTIZ
  Incoming interface: Serial3/0, RPF nbr 150.1.13.1
  Outgoing interface list:
    MVRF BLUE, Forward/Sparse, 00:19:41/00:00:03

(*, 224.0.1.40), 00:24:26/00:02:11, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Loopback0, Forward/Sparse, 00:24:26/00:02:11


R3#sh ip mrout vrf BLUE
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
       L - Local, P - Pruned, R - RP-bit set, F - Register flag,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report,
       Z - Multicast Tunnel, z - MDT-data group sender,
       Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched, A - Assert winner
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 224.0.1.40), 00:44:28/00:02:52, RP 10.1.37.7, flags: SJPL
  Incoming interface: Ethernet0/0, RPF nbr 10.1.37.7
  Outgoing interface list: Null

R3#