We are given a MPLS backbone from a service provider. When we connect a L3 switch with HSRP and connect 3 IP we can ping all other location. But when we connect the 4th PC it cannot PINg Even the ARP table for the 4th PC shows Incomplete.
The same is the case with a L2 switch also. There is no ARP entry for the 4th PC and we cannot PINg from it.
The service provider uses a Juniper M40 Router for MPLS and a subinterface is created for us. There are L2 transport equipment between the M40 and our cisco router.