User's Manual

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3.6.3. L2TP
In com puter networking, L ayer 2 Tunneling Prot ocol (L2TP) is a tunneli ng p rotocol used to
support virtual private networks (VPNs). It does not provide any encryption or confidentiality by
itself. It relies on an encryption protocol that it passes within the tunnel to provide privacy. The
entire L2TP packet, including payload and L2TP header, is sent within a UDP datagram. It is
common to carry Point-to-Point Protocol (PPP) session within an L2TP tunnel. L2TP does not
provide confidentiality or strong aut hentication by it self. IPsec is of ten use d to secu re L2 TP
packets by providing confidentiality, authentication and integrity.
Above is based on information from Wikipedia (http://en.wikipedia.org/wiki/Layer_2_Tunneling_Protocol)
3.6.4. L2TP Server
User can setup WiMAX outdoor CPE from web page as shown in Figure 32. The definition for
each field of PPTP Server is shown on Table 18.