I had the same problem and after checking the logs i came to know that the IP was getting duplicate and the logs  were showing,"Failed to configure IP address on Vlan123. IPaddress overlaps with one of the address configured on Vlan321 in vrf default...

Hi ganpatspatil,To late to answer but a guidance for the others. 17 is the IGP label/tag that will specify the next hop using which you can reach other side of the MPLS VPN. For instance Router A will send a Traffic to Router B with label/tag 17 and ...