SW1---MPLS R1 ---MPLS R2----SW2
Scenario 1 : when MPLS R1 and MPLS R2 P2P IP is set on VLAN
Result : MPLS R1 can ping MPLS R2
MPLS LDP SESSION - ACTIVE
VSI - UP
SW1 can not ping SW2 [SW1 and SW2 have Interface vlanif ]

Scenario 2 : when MPLS R1 and MPLS R2 P2P IP is set on Physical Interface G0/0/0
Result : MPLS R1 can ping MPLS R2
MPLS LDP SESSION - ACTIVE
VSI - UP
SW1 can ping SW2 [SW1 and SW2 have Interface vlanif ]
