Cisco ASR 9000 Series

Figure 31: GRE tunnel configured between PE to PE routers
Figure 32: GRE tunnel configured between P to P routers
Figure 33: GRE tunnel configured between P to PE routers
These deployment scenarios are applicable to VPWS and VPLS.
Note
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
226
Implementing Multipoint Layer 2 Services
GRE Deployment Scenarios