Configuring the IP Address of Hub 1564Configuring the Pre-Shared Key of VAM Server for a VPN Domain 1565Configuring Keepalive Parameters 1565Configuring the VAM Client 1565VAM Client Configuration Task List 1566Creating a VAM Client 1566Specifying an Interval for Resending a VAM Packet 1566Specifying the Primary VAM Server 1566Specifying the Secondary VAM Server 1567Creating a Local User and Password 1567Specifying the VPN Domain of the VAM Client 1567Specifying the Pre-Shared Key of the VAM Client 1567Enabling the VAM Client 1568Configuring an IPSec Profile 1568Configuration Prerequisites 1568Configuring an IPSec Profile 1568Configuring the DVPN Tunnel Parameters 1569Prerequisites 1569Configuring a DVPN Tunnel 1569Configuring a DVPN Route 1571Displaying and Maintaining DVPN 1571DVPN Configuration Example 1571DVPN Configuration Example for Full-Mesh Networks 1571DVPN Configuration Example for Spoke-Hub Networks 158181 GRE C ONFIGURATIONGRE Overview 1589Introduction to GRE 1589GRE Applications 1591Configuring a GRE over IPv4 Tunnel 1593Configuration Prerequisites 1593Configuration Procedure 1593Configuring a GRE over IPv6 Tunnel 1594Configuration Prerequisites 1594Configuration Procedure 1594Displaying and Maintaining GRE 1596GRE over IPv4 Tunnel Configuration Example 1596GRE over IPv6 Tunnel Configuration Example 1598Troubleshooting GRE 160082 L2TP C ONFIGURATIONL2TP Overview 1601Introduction to VPDN 1601Introduction to L2TP 1602L2TP Configuration Task List 1607LAC Configuration 1607Configuring the LAC 1607Configuring the Local AAA Scheme and the Users and Passwords 1609LNS Configuration 1609Configuring the LNS 1609
