I was reading one case study in CISCO IOS MPLS configuration of Cisco Press book. There they have three PE routers PE1/PE2/PE3 is connected with P routers in core as well as connected with CE1/CE2/CE3 of customer A respectively.
now what is the need of mGRE there as all the CE facing interfaces of PE routers are part of VRF custA? how can i take advantages of mGRE in such kind of environment? Actually i need deployment idea of mGRE in MPLS VPN environment.