z**r
发帖数: 17771 | 1 才看到题目问的是mGRE，mGRE在MVPN里是自动建立的一堆MTI，属于point to
multipoint。这个应用还是挺广的，因为目前MPLS backbone不能给mroutes分配label
，所以每个MVPN实际上还是走native mpls，不过是放在了GRE封装里
or
the |
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s*****g
发帖数: 1055 | 3 Multip-point GRE which is typically used in CISCO IOS to implement DMVPN or
multi-cast MPLS VPN, MGRE is different for regular point-to-point GRE in the
sense that tunnel destination is not pre-determined, buy rather decided
dynamically on the fly to PEs to encapsulate customer traffic. |
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z**r
发帖数: 17771 | 5 有几家在用，这个主要是为某些运营商不愿意升级backbone到mpls core，非要停留在
pure IP，但是大势所趋又不得不通过PE提供VPN服务。再就是要跨过几个Provider提供
vpn，但是又不值得跑inter-as vpn or CsC，总之不管哪种，都觉得是一个过渡方案 |
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s*****g
发帖数: 1055 | 6 Multicast VPN does not use MPLS at all, well except PIM Sparse register/
register stop packets. |
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z**r
发帖数: 17771 | 7 so I wasn't wrong right? ;) |
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t*******r
发帖数: 3271 | 8 Rosen就一直是比较搞的~ 居然北美的几大SP里还有不少人用~ SIGH... |
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