Gateway_less_Fwd: When IP-Fabric VN is configured as provider network over vn1 and vn2, with out policy routes of other compute node VMs getting leaked between vn1 and vn2

When IP-Fabric VN is configured as provider network over vn1 and vn2, with out policy routes of other compute node VMs getting leaked between vns.

Able to ping VM1 (vn1) from one compute to VM2(vn2) in another compute.

Build
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R4.1.0.0 Build 23 Ubuntu 14.04 Mitaka

Topology
—————
Control/config/analytics node :nodei15
Compute nodes : nodek11, nodec23 and nodeb3

Steps
———--
1. Create a vn1 (10.10.10.0/24) and vn2 (20.20.20.0/24) and configure IP Fabric network as provider network over both vn1 and vn2
2. Now, launch couple of VMs on both the VNs across compute nodes. (say VM1 (compute1) : 10.10.10.3/24, VM2 (compute1): 20.20.20.3/24, VM3 (compute2) : 10.10.10.4/24, VM4 (compute2): 20.20.20.4/24 )
3. Now, ping VM4 from VM1 is successful with out any policy between vns. Similar case on another compute also.

Below is the flow:

root@nodek11:~# flow --match 20.20.20.4
Flow table(size 80609280, entries 629760)

Entries: Created 59 Added 59 Deleted 72 Changed 76 Processed 59 Used Overflow entries 0
(Created Flows/CPU: 3 3 3 3 3 3 2 9 0 1 0 0 0 0 0 0 4 6 5 3 4 2 5 0 0 0 0 0 0 0 0 0)(oflows 0)

Action:F=Forward, D=Drop N=NAT(S=SNAT, D=DNAT, Ps=SPAT, Pd=DPAT, L=Link Local Port)
 Other:K(nh)=Key_Nexthop, S(nh)=RPF_Nexthop
 Flags:E=Evicted, Ec=Evict Candidate, N=New Flow, M=Modified Dm=Delete Marked
TCP(r=reverse):S=SYN, F=FIN, R=RST, C=HalfClose, E=Established, D=Dead

Listing flows matching ([20.20.20.4]:*)

    Index Source:Port/Destination:Port Proto(V)
-----------------------------------------------------------------------------------
   126504<=>316740 10.10.10.3:28929 1 (0)
                         20.20.20.4:0
(Gen: 1, K(nh):38, Action:F, Flags:, QOS:-1, S(nh):38, Stats:68/6664,
 SPort 65478, TTL 0, Sinfo 8.0.0.0)

   316740<=>126504 20.20.20.4:28929 1 (0)
                         10.10.10.3:0
(Gen: 1, K(nh):38, Action:F, Flags:, QOS:-1, S(nh):14, Stats:68/5712,
 SPort 55678, TTL 0, Sinfo 0.0.0.0)

root@nodek11:~#