i studied GVPN and i understood its concept but i haven't seen or worked in a place using GVPN either cisco or juniper ...
i want to know who use GVPN ?? is it used by serivce provider or by enterprises such as bank and its branchs
-Does it used by service provider to secure its MPLS network or its used by enterprise to secure its traffics when it pass through the SP networ ????
Juniper ADVPN and Cisco DVPN are used generally by large enterprises with a number of remote sites connecting using IPSEC VPN over the internet to a VPN conncentrator at the central site.
These technologies provide a simplicfication of deploy configuration for the large remote site and a measure of automation on the connection and routing that needs to occur for the enterprise WAN.
This free book: Day One: ADVPN Design & Implementation may be of interest.
One of advantages of Group VPN: Maintains network intelligence such as full-mesh connectivity, natural routing path, and quality of service (QoS) in MPLS networks.
Don't know the market, but from my perspective, the most suitable scenario is an enterprises with full mesh connectivity.
Don't think SP need a VPN because SP has dedicated line.
Only expresses individual viewpoint, only supplies the references.