[j-nsp] BGP route-target filtering issue

[Mihai]

Hi,

  I have three routers (r1,r3,r4) and a full mesh IBGP between them.
R1 is configured with inet-vpn , R3 and R4 with inet-vpn and route-target.

r1# show protocols bgp
group IBGP {
     type internal;
     local-address 1.1.1.1;
     family inet-vpn {
         unicast;
     }
     neighbor 3.3.3.3;
     neighbor 4.4.4.4;
}

r3# show protocols bgp
group IBGP {
     type internal;
     local-address 3.3.3.3;
     family inet-vpn {
         unicast;
     }
     family route-target;
     neighbor 1.1.1.1;
     neighbor 4.4.4.4;
}

r4# show protocols bgp
group IBGP {
     type internal;
     local-address 4.4.4.4;
     family inet-vpn {
         unicast;
     }
     family route-target;
     neighbor 1.1.1.1;
     neighbor 3.3.3.3;
}

I don't understand why R3 and R4 are advertising the default rt route 
(0:0:0/0) in this topology as I am not using route reflectors.

r3# run show  table bgp.rt
Jun 06 18:10:05

bgp.rtarget.0: 1 destinations, 2 routes (1 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both

0:0:0/0
                    *[RTarget/5] 00:10:46
                       Type Default
                       Local
                     [BGP/170] 00:10:42, localpref 100, from 4.4.4.4
                       AS path: I, validation-state: unverified
                     > to 10.0.2.6 via ge-0/0/4.34

r4# run show  table bgp.rt

bgp.rtarget.0: 1 destinations, 2 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0:0:0/0
                    *[RTarget/5] 00:11:13
                       Type Default
                       Local
                     [BGP/170] 00:11:09, localpref 100, from 3.3.3.3
                       AS path: I, validation-state: unverified
                     > to 10.0.2.5 via ge-0/0/3.34

If I want to create a VRF/L2VPN/VPLS on R3 (first) and R4 (later) the 
service will be down because R3 will not readvertise the VRF/L2VPN/VPLS 
when is receiving the VPN RT/ROUTE from R4.
The only solution to get the R3 VPN route on R4 is by requesting it with 
a ROUTE REFRESH (clear soft-inbound) from R4.

This has been tested on Junos 13.3 and 14.1.

PS: I don't want to configure R3/R4 with "keep all" and I can't make any 
configuration that will reset the BGP sessions.

Does this look like a BUG?

Regards,
Mihai