This document provides a sample configuration for configuring Dial backup on a Dynamic Multipoint poke router in a Dynamic Multipoint VPN (DMVPN) Hub-and-spoke network. The DMVPN solution is used to build large Cisco IOS® IP Security (IPsec) VPNs. DMVPN combines generic routing encapsulation (GRE) tunnels, IPsec encryption, and Next Hop Resolution Protocol (NHRP). Dial backup enables the spoke router to try alternative path to reach the hub router, when the direct primary path to the hub router fails. This configuration relies on Dial back up, Reliable Static Routing Backup Using Object Tracking, and Policy Based Routing. This sample configuration shows how to enable the failover over a dial-up modem, when the primary path to the hub router fails and how to recover from the backup path, when the primary path is recovered.
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