from the diagram cisco B is having loopback which is advertised by cisco C as label of 45 but the same is advertised by Maipu A as label of implicit null to Maipu B.
Load balacing is done between cisco C -> Cisco A and Maipu A -> Cisco A.
My question is that why cisco C router is advertised by some label .As per cisco it should do the PHP and advertise the loopback of cisco B router to Maipu B with impicit null. But it is not performing. Please provide the solution and send ur comments.