7
11.2 Flow Control .......................................................................................................................................... 72
12 VPN ...................................................................................................................................................................73
12.1 IPSec ........................................................................................................................................................73
12.2 GRE .........................................................................................................................................................79
12.3 .......................................................................................................................................................... ….. ...88
12.4 Certificate Management ......................................................................................................................85
12.5 DMVPN ..................................................................................................................................................86
13 Tools ...................................................................................................................................................................95
13.1 PING detection ......................................................................................................................................95
13.2 Routing detection ..................................................................................................................................96
13.3 Internet Speed Testing .......................................................................................................................... 97
14 Typical Networking Configuration Examples...........................................................................................98
15 Appendix - Setting of Command Line ...................................................................................................... 101
15.1 Set up Configuration Environment through the Console Port ................................................... 102
15.2 Online Help of Command Line ........................................................................................................ 104
15.3 Command Line Operation ................................................................................................................. 105
16 Appendix - Troubleshooting ....................................................................................................................... 107
17 Appendix - Default Settings ........................................................................................................................ 110
18 Appendix - Glossary of Terms.................................................................................................................... 111