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Section 1 (Introduction) says:
This document describes requirements for two types of network-based
L3 PPVPNs: aggregated routing VPNs [RFC2547bis] and virtual routers
[PPVPN-VR] and one type of CE-based PPVPN [IPsec-PPVPN].
Please reword. It is not clear how to parse this sentence into two types.
The right hand side of Figure 3.2 is not quite right.